mercurial-scm/hg-stable: mercurial/revlogutils/deltas.py annotate

annotate mercurial/revlogutils/deltas.py @ 49794:40e24d82b513

delta-find: make sure we only use newer full snapshot as candidate The current code does not needs to protect against this, as there are no older snapshot in the current cache. However as we are getting ready to reuse this cache from one revision to another, we need the code to protect itself about what's coming.

author	Pierre-Yves David <pierre-yves.david@octobus.net>
date	Sun, 06 Nov 2022 17:55:55 -0500
parents	b670eb3dd6c9
children	c261a628e525

rev	line source
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	1 # revlogdeltas.py - Logic around delta computation for revlog
8226 8b2cd04a6e97 put license and copyright info into comment blocks Martin Geisler <mg@lazybytes.net> parents: 8225 diff changeset	2 #
46819 d4ba4d51f85f contributor: change mentions of mpm to olivia Rapha?l Gom?s <rgomes@octobus.net> parents: 43089 diff changeset	3 # Copyright 2005-2007 Olivia Mackall <olivia@selenic.com>
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	4 # Copyright 2018 Octobus <contact@octobus.net>
8226 8b2cd04a6e97 put license and copyright info into comment blocks Martin Geisler <mg@lazybytes.net> parents: 8225 diff changeset	5 #
8b2cd04a6e97 put license and copyright info into comment blocks Martin Geisler <mg@lazybytes.net> parents: 8225 diff changeset	6 # This software may be used and distributed according to the terms of the
10263 25e572394f5c Update license to GPLv2+ Matt Mackall <mpm@selenic.com> parents: 10047 diff changeset	7 # GNU General Public License version 2 or any later version.
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	8 """Helper class to compute deltas stored inside revlogs"""
8227 0a9542703300 turn some comments back into module docstrings Martin Geisler <mg@lazybytes.net> parents: 8226 diff changeset	9
27361 29f50344fa83 revlog: use absolute_import Gregory Szorc <gregory.szorc@gmail.com> parents: 27251 diff changeset	10
39510 3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot Boris Feld <boris.feld@octobus.net> parents: 39509 diff changeset	11 import collections
27361 29f50344fa83 revlog: use absolute_import Gregory Szorc <gregory.szorc@gmail.com> parents: 27251 diff changeset	12 import struct
29f50344fa83 revlog: use absolute_import Gregory Szorc <gregory.szorc@gmail.com> parents: 27251 diff changeset	13
29f50344fa83 revlog: use absolute_import Gregory Szorc <gregory.szorc@gmail.com> parents: 27251 diff changeset	14 # import stuff from node for others to import from revlog
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	15 from ..node import nullrev
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	16 from ..i18n import _
43089 c59eb1560c44 py3: manually import getattr where it is needed Gregory Szorc <gregory.szorc@gmail.com> parents: 43077 diff changeset	17 from ..pycompat import getattr
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	18
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	19 from .constants import (
47458 c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	20 COMP_MODE_DEFAULT,
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	21 COMP_MODE_INLINE,
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	22 COMP_MODE_PLAIN,
49791 05db41701ece find-delta: pass the cache-delta usage policy alongside the cache-delta Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49789 diff changeset	23 DELTA_BASE_REUSE_NO,
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	24 KIND_CHANGELOG,
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	25 KIND_FILELOG,
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	26 KIND_MANIFESTLOG,
39356 729082bb9938 revlog: split constants into a new `revlogutils.constants` module Boris Feld <boris.feld@octobus.net> parents: 39260 diff changeset	27 REVIDX_ISCENSORED,
729082bb9938 revlog: split constants into a new `revlogutils.constants` module Boris Feld <boris.feld@octobus.net> parents: 39260 diff changeset	28 REVIDX_RAWTEXT_CHANGING_FLAGS,
729082bb9938 revlog: split constants into a new `revlogutils.constants` module Boris Feld <boris.feld@octobus.net> parents: 39260 diff changeset	29 )
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	30
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	31 from ..thirdparty import attr
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	32
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	33 from .. import (
27361 29f50344fa83 revlog: use absolute_import Gregory Szorc <gregory.szorc@gmail.com> parents: 27251 diff changeset	34 error,
29f50344fa83 revlog: use absolute_import Gregory Szorc <gregory.szorc@gmail.com> parents: 27251 diff changeset	35 mdiff,
41111 38e88450138c delta: have a native implementation of _findsnapshot Boris Feld <boris.feld@octobus.net> parents: 41082 diff changeset	36 util,
27361 29f50344fa83 revlog: use absolute_import Gregory Szorc <gregory.szorc@gmail.com> parents: 27251 diff changeset	37 )
10913 f2ecc5733c89 revlog: factor out _maxinline global. Greg Ward <greg-hg@gerg.ca> parents: 10404 diff changeset	38
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	39 from . import flagutil
42994 dff95420480f flagprocessors: make `processflagsraw` a module level function Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42884 diff changeset	40
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	41 # maximum <delta-chain-data>/<revision-text-length> ratio
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	42 LIMIT_DELTA2TEXT = 2
1091 d62130f99a73 Move hash function back to revlog from node mpm@selenic.com parents: 1089 diff changeset	43
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	44
49037 642e31cb55f0 py3: use class X: instead of class X(object): Gregory Szorc <gregory.szorc@gmail.com> parents: 48966 diff changeset	45 class _testrevlog:
38637 e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	46 """minimalist fake revlog to use in doctests"""
e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	47
40684 85b14f0dc334 doctest: add a `issnapshot` method to _testrevlog Boris Feld <boris.feld@octobus.net> parents: 40655 diff changeset	48 def __init__(self, data, density=0.5, mingap=0, snapshot=()):
38637 e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	49 """data is an list of revision payload boundaries"""
e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	50 self._data = data
e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	51 self._srdensitythreshold = density
e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	52 self._srmingapsize = mingap
40684 85b14f0dc334 doctest: add a `issnapshot` method to _testrevlog Boris Feld <boris.feld@octobus.net> parents: 40655 diff changeset	53 self._snapshot = set(snapshot)
40748 39d29542fe40 sparse-revlog: put the native implementation of slicechunktodensity to use Boris Feld <boris.feld@octobus.net> parents: 40698 diff changeset	54 self.index = None
38637 e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	55
e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	56 def start(self, rev):
41082 88d813cd9acd revlog: fix pure python slicing test when chain contains nullrev Boris Feld <boris.feld@octobus.net> parents: 41036 diff changeset	57 if rev == nullrev:
88d813cd9acd revlog: fix pure python slicing test when chain contains nullrev Boris Feld <boris.feld@octobus.net> parents: 41036 diff changeset	58 return 0
38637 e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	59 if rev == 0:
e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	60 return 0
e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	61 return self._data[rev - 1]
e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	62
e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	63 def end(self, rev):
41082 88d813cd9acd revlog: fix pure python slicing test when chain contains nullrev Boris Feld <boris.feld@octobus.net> parents: 41036 diff changeset	64 if rev == nullrev:
88d813cd9acd revlog: fix pure python slicing test when chain contains nullrev Boris Feld <boris.feld@octobus.net> parents: 41036 diff changeset	65 return 0
38637 e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	66 return self._data[rev]
e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	67
e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	68 def length(self, rev):
e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	69 return self.end(rev) - self.start(rev)
e33f784f2a44 revlog: introduce a tiny mock of a revlog class Boris Feld <boris.feld@octobus.net> parents: 38636 diff changeset	70
38718 f8762ea73e0d sparse-revlog: implement algorithm to write sparse delta chains (issue5480) Paul Morelle <paul.morelle@octobus.net> parents: 38717 diff changeset	71 def __len__(self):
f8762ea73e0d sparse-revlog: implement algorithm to write sparse delta chains (issue5480) Paul Morelle <paul.morelle@octobus.net> parents: 38717 diff changeset	72 return len(self._data)
f8762ea73e0d sparse-revlog: implement algorithm to write sparse delta chains (issue5480) Paul Morelle <paul.morelle@octobus.net> parents: 38717 diff changeset	73
40684 85b14f0dc334 doctest: add a `issnapshot` method to _testrevlog Boris Feld <boris.feld@octobus.net> parents: 40655 diff changeset	74 def issnapshot(self, rev):
41082 88d813cd9acd revlog: fix pure python slicing test when chain contains nullrev Boris Feld <boris.feld@octobus.net> parents: 41036 diff changeset	75 if rev == nullrev:
88d813cd9acd revlog: fix pure python slicing test when chain contains nullrev Boris Feld <boris.feld@octobus.net> parents: 41036 diff changeset	76 return True
40684 85b14f0dc334 doctest: add a `issnapshot` method to _testrevlog Boris Feld <boris.feld@octobus.net> parents: 40655 diff changeset	77 return rev in self._snapshot
85b14f0dc334 doctest: add a `issnapshot` method to _testrevlog Boris Feld <boris.feld@octobus.net> parents: 40655 diff changeset	78
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	79
40651 3ac23dad6364 sparse-revlog: drop unused deltainfo parameter from _slicechunktodensity Boris Feld <boris.feld@octobus.net> parents: 40650 diff changeset	80 def slicechunk(revlog, revs, targetsize=None):
34824 e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	81 """slice revs to reduce the amount of unrelated data to be read from disk.
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	82
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	83 ``revs`` is sliced into groups that should be read in one time.
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	84 Assume that revs are sorted.
38640 f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	85
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	86 The initial chunk is sliced until the overall density (payload/chunks-span
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	87 ratio) is above `revlog._srdensitythreshold`. No gap smaller than
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	88 `revlog._srmingapsize` is skipped.
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	89
38643 967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	90 If `targetsize` is set, no chunk larger than `targetsize` will be yield.
967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	91 For consistency with other slicing choice, this limit won't go lower than
967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	92 `revlog._srmingapsize`.
967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	93
967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	94 If individual revisions chunk are larger than this limit, they will still
967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	95 be raised individually.
967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	96
40685 9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	97 >>> data = [
38640 f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	98 ... 5, #00 (5)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	99 ... 10, #01 (5)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	100 ... 12, #02 (2)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	101 ... 12, #03 (empty)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	102 ... 27, #04 (15)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	103 ... 31, #05 (4)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	104 ... 31, #06 (empty)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	105 ... 42, #07 (11)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	106 ... 47, #08 (5)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	107 ... 47, #09 (empty)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	108 ... 48, #10 (1)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	109 ... 51, #11 (3)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	110 ... 74, #12 (23)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	111 ... 85, #13 (11)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	112 ... 86, #14 (1)
f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	113 ... 91, #15 (5)
40685 9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	114 ... ]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	115 >>> revlog = _testrevlog(data, snapshot=range(16))
38640 f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	116
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	117 >>> list(slicechunk(revlog, list(range(16))))
38640 f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	118 [[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]]
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	119 >>> list(slicechunk(revlog, [0, 15]))
38640 f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	120 [[0], [15]]
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	121 >>> list(slicechunk(revlog, [0, 11, 15]))
38640 f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	122 [[0], [11], [15]]
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	123 >>> list(slicechunk(revlog, [0, 11, 13, 15]))
38640 f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	124 [[0], [11, 13, 15]]
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	125 >>> list(slicechunk(revlog, [1, 2, 3, 5, 8, 10, 11, 14]))
38640 f62b8fb0a484 revlog: document and test _slicechunk Boris Feld <boris.feld@octobus.net> parents: 38639 diff changeset	126 [[1, 2], [5, 8, 10, 11], [14]]
38643 967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	127
967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	128 Slicing with a maximum chunk size
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	129 >>> list(slicechunk(revlog, [0, 11, 13, 15], targetsize=15))
38643 967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	130 [[0], [11], [13], [15]]
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	131 >>> list(slicechunk(revlog, [0, 11, 13, 15], targetsize=20))
38643 967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	132 [[0], [11], [13, 15]]
41082 88d813cd9acd revlog: fix pure python slicing test when chain contains nullrev Boris Feld <boris.feld@octobus.net> parents: 41036 diff changeset	133
88d813cd9acd revlog: fix pure python slicing test when chain contains nullrev Boris Feld <boris.feld@octobus.net> parents: 41036 diff changeset	134 Slicing involving nullrev
88d813cd9acd revlog: fix pure python slicing test when chain contains nullrev Boris Feld <boris.feld@octobus.net> parents: 41036 diff changeset	135 >>> list(slicechunk(revlog, [-1, 0, 11, 13, 15], targetsize=20))
88d813cd9acd revlog: fix pure python slicing test when chain contains nullrev Boris Feld <boris.feld@octobus.net> parents: 41036 diff changeset	136 [[-1, 0], [11], [13, 15]]
88d813cd9acd revlog: fix pure python slicing test when chain contains nullrev Boris Feld <boris.feld@octobus.net> parents: 41036 diff changeset	137 >>> list(slicechunk(revlog, [-1, 13, 15], targetsize=5))
88d813cd9acd revlog: fix pure python slicing test when chain contains nullrev Boris Feld <boris.feld@octobus.net> parents: 41036 diff changeset	138 [[-1], [13], [15]]
34824 e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	139 """
38643 967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	140 if targetsize is not None:
967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	141 targetsize = max(targetsize, revlog._srmingapsize)
38718 f8762ea73e0d sparse-revlog: implement algorithm to write sparse delta chains (issue5480) Paul Morelle <paul.morelle@octobus.net> parents: 38717 diff changeset	142 # targetsize should not be specified when evaluating delta candidates:
f8762ea73e0d sparse-revlog: implement algorithm to write sparse delta chains (issue5480) Paul Morelle <paul.morelle@octobus.net> parents: 38717 diff changeset	143 # * targetsize is used to ensure we stay within specification when reading,
40748 39d29542fe40 sparse-revlog: put the native implementation of slicechunktodensity to use Boris Feld <boris.feld@octobus.net> parents: 40698 diff changeset	144 densityslicing = getattr(revlog.index, 'slicechunktodensity', None)
39d29542fe40 sparse-revlog: put the native implementation of slicechunktodensity to use Boris Feld <boris.feld@octobus.net> parents: 40698 diff changeset	145 if densityslicing is None:
39d29542fe40 sparse-revlog: put the native implementation of slicechunktodensity to use Boris Feld <boris.feld@octobus.net> parents: 40698 diff changeset	146 densityslicing = lambda x, y, z: _slicechunktodensity(revlog, x, y, z)
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	147 for chunk in densityslicing(
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	148 revs, revlog._srdensitythreshold, revlog._srmingapsize
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	149 ):
38643 967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	150 for subchunk in _slicechunktosize(revlog, chunk, targetsize):
967fee55e8d9 revlog: postprocess chunk to slice them down to a certain size Boris Feld <boris.feld@octobus.net> parents: 38642 diff changeset	151 yield subchunk
38641 feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	152
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	153
38718 f8762ea73e0d sparse-revlog: implement algorithm to write sparse delta chains (issue5480) Paul Morelle <paul.morelle@octobus.net> parents: 38717 diff changeset	154 def _slicechunktosize(revlog, revs, targetsize=None):
38642 e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	155 """slice revs to match the target size
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	156
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	157 This is intended to be used on chunk that density slicing selected by that
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	158 are still too large compared to the read garantee of revlog. This might
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	159 happens when "minimal gap size" interrupted the slicing or when chain are
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	160 built in a way that create large blocks next to each other.
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	161
40685 9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	162 >>> data = [
38642 e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	163 ... 3, #0 (3)
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	164 ... 5, #1 (2)
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	165 ... 6, #2 (1)
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	166 ... 8, #3 (2)
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	167 ... 8, #4 (empty)
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	168 ... 11, #5 (3)
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	169 ... 12, #6 (1)
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	170 ... 13, #7 (1)
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	171 ... 14, #8 (1)
40685 9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	172 ... ]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	173
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	174 == All snapshots cases ==
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	175 >>> revlog = _testrevlog(data, snapshot=range(9))
38642 e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	176
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	177 Cases where chunk is already small enough
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	178 >>> list(_slicechunktosize(revlog, [0], 3))
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	179 [[0]]
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	180 >>> list(_slicechunktosize(revlog, [6, 7], 3))
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	181 [[6, 7]]
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	182 >>> list(_slicechunktosize(revlog, [0], None))
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	183 [[0]]
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	184 >>> list(_slicechunktosize(revlog, [6, 7], None))
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	185 [[6, 7]]
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	186
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	187 cases where we need actual slicing
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	188 >>> list(_slicechunktosize(revlog, [0, 1], 3))
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	189 [[0], [1]]
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	190 >>> list(_slicechunktosize(revlog, [1, 3], 3))
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	191 [[1], [3]]
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	192 >>> list(_slicechunktosize(revlog, [1, 2, 3], 3))
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	193 [[1, 2], [3]]
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	194 >>> list(_slicechunktosize(revlog, [3, 5], 3))
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	195 [[3], [5]]
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	196 >>> list(_slicechunktosize(revlog, [3, 4, 5], 3))
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	197 [[3], [5]]
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	198 >>> list(_slicechunktosize(revlog, [5, 6, 7, 8], 3))
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	199 [[5], [6, 7, 8]]
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	200 >>> list(_slicechunktosize(revlog, [0, 1, 2, 3, 4, 5, 6, 7, 8], 3))
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	201 [[0], [1, 2], [3], [5], [6, 7, 8]]
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	202
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	203 Case with too large individual chunk (must return valid chunk)
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	204 >>> list(_slicechunktosize(revlog, [0, 1], 2))
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	205 [[0], [1]]
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	206 >>> list(_slicechunktosize(revlog, [1, 3], 1))
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	207 [[1], [3]]
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	208 >>> list(_slicechunktosize(revlog, [3, 4, 5], 2))
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	209 [[3], [5]]
40685 9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	210
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	211 == No Snapshot cases ==
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	212 >>> revlog = _testrevlog(data)
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	213
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	214 Cases where chunk is already small enough
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	215 >>> list(_slicechunktosize(revlog, [0], 3))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	216 [[0]]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	217 >>> list(_slicechunktosize(revlog, [6, 7], 3))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	218 [[6, 7]]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	219 >>> list(_slicechunktosize(revlog, [0], None))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	220 [[0]]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	221 >>> list(_slicechunktosize(revlog, [6, 7], None))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	222 [[6, 7]]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	223
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	224 cases where we need actual slicing
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	225 >>> list(_slicechunktosize(revlog, [0, 1], 3))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	226 [[0], [1]]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	227 >>> list(_slicechunktosize(revlog, [1, 3], 3))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	228 [[1], [3]]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	229 >>> list(_slicechunktosize(revlog, [1, 2, 3], 3))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	230 [[1], [2, 3]]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	231 >>> list(_slicechunktosize(revlog, [3, 5], 3))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	232 [[3], [5]]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	233 >>> list(_slicechunktosize(revlog, [3, 4, 5], 3))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	234 [[3], [4, 5]]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	235 >>> list(_slicechunktosize(revlog, [5, 6, 7, 8], 3))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	236 [[5], [6, 7, 8]]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	237 >>> list(_slicechunktosize(revlog, [0, 1, 2, 3, 4, 5, 6, 7, 8], 3))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	238 [[0], [1, 2], [3], [5], [6, 7, 8]]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	239
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	240 Case with too large individual chunk (must return valid chunk)
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	241 >>> list(_slicechunktosize(revlog, [0, 1], 2))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	242 [[0], [1]]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	243 >>> list(_slicechunktosize(revlog, [1, 3], 1))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	244 [[1], [3]]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	245 >>> list(_slicechunktosize(revlog, [3, 4, 5], 2))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	246 [[3], [5]]
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	247
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	248 == mixed case ==
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	249 >>> revlog = _testrevlog(data, snapshot=[0, 1, 2])
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	250 >>> list(_slicechunktosize(revlog, list(range(9)), 5))
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	251 [[0, 1], [2], [3, 4, 5], [6, 7, 8]]
38642 e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	252 """
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	253 assert targetsize is None or 0 <= targetsize
40685 9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	254 startdata = revlog.start(revs[0])
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	255 enddata = revlog.end(revs[-1])
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	256 fullspan = enddata - startdata
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	257 if targetsize is None or fullspan <= targetsize:
38642 e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	258 yield revs
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	259 return
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	260
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	261 startrevidx = 0
40698 2eb48aa0acce sparse-revlog: align endrevidx usages in the _slicechunktosize Boris Feld <boris.feld@octobus.net> parents: 40697 diff changeset	262 endrevidx = 1
38642 e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	263 iterrevs = enumerate(revs)
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	264 next(iterrevs) # skip first rev.
40685 9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	265 # first step: get snapshots out of the way
38642 e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	266 for idx, r in iterrevs:
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	267 span = revlog.end(r) - startdata
40685 9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	268 snapshot = revlog.issnapshot(r)
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	269 if span <= targetsize and snapshot:
40698 2eb48aa0acce sparse-revlog: align endrevidx usages in the _slicechunktosize Boris Feld <boris.feld@octobus.net> parents: 40697 diff changeset	270 endrevidx = idx + 1
38642 e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	271 else:
40698 2eb48aa0acce sparse-revlog: align endrevidx usages in the _slicechunktosize Boris Feld <boris.feld@octobus.net> parents: 40697 diff changeset	272 chunk = _trimchunk(revlog, revs, startrevidx, endrevidx)
38642 e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	273 if chunk:
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	274 yield chunk
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	275 startrevidx = idx
e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	276 startdata = revlog.start(r)
40698 2eb48aa0acce sparse-revlog: align endrevidx usages in the _slicechunktosize Boris Feld <boris.feld@octobus.net> parents: 40697 diff changeset	277 endrevidx = idx + 1
40685 9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	278 if not snapshot:
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	279 break
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	280
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	281 # for the others, we use binary slicing to quickly converge toward valid
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	282 # chunks (otherwise, we might end up looking for start/end of many
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	283 # revisions). This logic is not looking for the perfect slicing point, it
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	284 # focuses on quickly converging toward valid chunks.
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	285 nbitem = len(revs)
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	286 while (enddata - startdata) > targetsize:
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	287 endrevidx = nbitem
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	288 if nbitem - startrevidx <= 1:
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	289 break # protect against individual chunk larger than limit
40685 9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	290 localenddata = revlog.end(revs[endrevidx - 1])
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	291 span = localenddata - startdata
40697 fd1d41ccbe38 sparse-revlog: use `span` variable as intended Boris Feld <boris.feld@octobus.net> parents: 40685 diff changeset	292 while span > targetsize:
40685 9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	293 if endrevidx - startrevidx <= 1:
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	294 break # protect against individual chunk larger than limit
40685 9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	295 endrevidx -= (endrevidx - startrevidx) // 2
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	296 localenddata = revlog.end(revs[endrevidx - 1])
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	297 span = localenddata - startdata
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	298 chunk = _trimchunk(revlog, revs, startrevidx, endrevidx)
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	299 if chunk:
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	300 yield chunk
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	301 startrevidx = endrevidx
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	302 startdata = revlog.start(revs[startrevidx])
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	303
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	304 chunk = _trimchunk(revlog, revs, startrevidx)
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	305 if chunk:
9c3c697267db sparse-revlog: rework the way we enforce chunk size limit Boris Feld <boris.feld@octobus.net> parents: 40684 diff changeset	306 yield chunk
38642 e59e27e52297 revlog: add function to slice chunk down to a given size Boris Feld <boris.feld@octobus.net> parents: 38641 diff changeset	307
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	308
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	309 def _slicechunktodensity(revlog, revs, targetdensity=0.5, mingapsize=0):
38641 feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	310 """slice revs to reduce the amount of unrelated data to be read from disk.
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	311
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	312 ``revs`` is sliced into groups that should be read in one time.
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	313 Assume that revs are sorted.
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	314
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	315 The initial chunk is sliced until the overall density (payload/chunks-span
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	316 ratio) is above `targetdensity`. No gap smaller than `mingapsize` is
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	317 skipped.
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	318
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	319 >>> revlog = _testrevlog([
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	320 ... 5, #00 (5)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	321 ... 10, #01 (5)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	322 ... 12, #02 (2)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	323 ... 12, #03 (empty)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	324 ... 27, #04 (15)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	325 ... 31, #05 (4)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	326 ... 31, #06 (empty)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	327 ... 42, #07 (11)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	328 ... 47, #08 (5)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	329 ... 47, #09 (empty)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	330 ... 48, #10 (1)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	331 ... 51, #11 (3)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	332 ... 74, #12 (23)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	333 ... 85, #13 (11)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	334 ... 86, #14 (1)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	335 ... 91, #15 (5)
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	336 ... ])
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	337
38655 cd1c484e31e8 revlog: adjust doctest examples to be portable to Python 3 Augie Fackler <augie@google.com> parents: 38644 diff changeset	338 >>> list(_slicechunktodensity(revlog, list(range(16))))
38641 feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	339 [[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]]
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	340 >>> list(_slicechunktodensity(revlog, [0, 15]))
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	341 [[0], [15]]
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	342 >>> list(_slicechunktodensity(revlog, [0, 11, 15]))
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	343 [[0], [11], [15]]
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	344 >>> list(_slicechunktodensity(revlog, [0, 11, 13, 15]))
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	345 [[0], [11, 13, 15]]
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	346 >>> list(_slicechunktodensity(revlog, [1, 2, 3, 5, 8, 10, 11, 14]))
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	347 [[1, 2], [5, 8, 10, 11], [14]]
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	348 >>> list(_slicechunktodensity(revlog, [1, 2, 3, 5, 8, 10, 11, 14],
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	349 ... mingapsize=20))
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	350 [[1, 2, 3, 5, 8, 10, 11], [14]]
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	351 >>> list(_slicechunktodensity(revlog, [1, 2, 3, 5, 8, 10, 11, 14],
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	352 ... targetdensity=0.95))
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	353 [[1, 2], [5], [8, 10, 11], [14]]
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	354 >>> list(_slicechunktodensity(revlog, [1, 2, 3, 5, 8, 10, 11, 14],
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	355 ... targetdensity=0.95, mingapsize=12))
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	356 [[1, 2], [5, 8, 10, 11], [14]]
feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	357 """
34824 e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	358 start = revlog.start
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	359 length = revlog.length
e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	360
34880 9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	361 if len(revs) <= 1:
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	362 yield revs
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	363 return
34824 e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	364
40651 3ac23dad6364 sparse-revlog: drop unused deltainfo parameter from _slicechunktodensity Boris Feld <boris.feld@octobus.net> parents: 40650 diff changeset	365 deltachainspan = segmentspan(revlog, revs)
34880 9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	366
38641 feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	367 if deltachainspan < mingapsize:
38635 d083ae26c325 revlog: early return in _slicechunk when span is already small enough Boris Feld <boris.feld@octobus.net> parents: 38634 diff changeset	368 yield revs
d083ae26c325 revlog: early return in _slicechunk when span is already small enough Boris Feld <boris.feld@octobus.net> parents: 38634 diff changeset	369 return
d083ae26c325 revlog: early return in _slicechunk when span is already small enough Boris Feld <boris.feld@octobus.net> parents: 38634 diff changeset	370
38718 f8762ea73e0d sparse-revlog: implement algorithm to write sparse delta chains (issue5480) Paul Morelle <paul.morelle@octobus.net> parents: 38717 diff changeset	371 readdata = deltachainspan
40653 bfbfd15d65bd sparse-revlog: fast-path before computing payload size Boris Feld <boris.feld@octobus.net> parents: 40652 diff changeset	372 chainpayload = sum(length(r) for r in revs)
34824 e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	373
34880 9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	374 if deltachainspan:
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	375 density = chainpayload / float(deltachainspan)
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	376 else:
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	377 density = 1.0
34824 e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	378
38641 feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	379 if density >= targetdensity:
38634 f0ea8b847831 revlog: early return in _slicechunk when density is already good Paul Morelle <paul.morelle@octobus.net> parents: 38632 diff changeset	380 yield revs
f0ea8b847831 revlog: early return in _slicechunk when density is already good Paul Morelle <paul.morelle@octobus.net> parents: 38632 diff changeset	381 return
f0ea8b847831 revlog: early return in _slicechunk when density is already good Paul Morelle <paul.morelle@octobus.net> parents: 38632 diff changeset	382
34880 9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	383 # Store the gaps in a heap to have them sorted by decreasing size
40654 54de23400b2a sparse-revlog: stop using a heap to track gaps Boris Feld <boris.feld@octobus.net> parents: 40653 diff changeset	384 gaps = []
34880 9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	385 prevend = None
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	386 for i, rev in enumerate(revs):
40651 3ac23dad6364 sparse-revlog: drop unused deltainfo parameter from _slicechunktodensity Boris Feld <boris.feld@octobus.net> parents: 40650 diff changeset	387 revstart = start(rev)
3ac23dad6364 sparse-revlog: drop unused deltainfo parameter from _slicechunktodensity Boris Feld <boris.feld@octobus.net> parents: 40650 diff changeset	388 revlen = length(rev)
34824 e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	389
34898 1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk Paul Morelle <paul.morelle@octobus.net> parents: 34881 diff changeset	390 # Skip empty revisions to form larger holes
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk Paul Morelle <paul.morelle@octobus.net> parents: 34881 diff changeset	391 if revlen == 0:
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk Paul Morelle <paul.morelle@octobus.net> parents: 34881 diff changeset	392 continue
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk Paul Morelle <paul.morelle@octobus.net> parents: 34881 diff changeset	393
34880 9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	394 if prevend is not None:
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	395 gapsize = revstart - prevend
34881 8c9b08a0c48c sparse-read: skip gaps too small to be worth splitting Paul Morelle <paul.morelle@octobus.net> parents: 34880 diff changeset	396 # only consider holes that are large enough
38641 feba6be0941b revlog: extract density based slicing into its own function Boris Feld <boris.feld@octobus.net> parents: 38640 diff changeset	397 if gapsize > mingapsize:
40654 54de23400b2a sparse-revlog: stop using a heap to track gaps Boris Feld <boris.feld@octobus.net> parents: 40653 diff changeset	398 gaps.append((gapsize, i))
34880 9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	399
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	400 prevend = revstart + revlen
40654 54de23400b2a sparse-revlog: stop using a heap to track gaps Boris Feld <boris.feld@octobus.net> parents: 40653 diff changeset	401 # sort the gaps to pop them from largest to small
54de23400b2a sparse-revlog: stop using a heap to track gaps Boris Feld <boris.feld@octobus.net> parents: 40653 diff changeset	402 gaps.sort()
34880 9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	403
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	404 # Collect the indices of the largest holes until the density is acceptable
40655 526ee887c4d5 sparse-revlog: stop using a heap to track selected gap Boris Feld <boris.feld@octobus.net> parents: 40654 diff changeset	405 selected = []
40654 54de23400b2a sparse-revlog: stop using a heap to track gaps Boris Feld <boris.feld@octobus.net> parents: 40653 diff changeset	406 while gaps and density < targetdensity:
54de23400b2a sparse-revlog: stop using a heap to track gaps Boris Feld <boris.feld@octobus.net> parents: 40653 diff changeset	407 gapsize, gapidx = gaps.pop()
34880 9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	408
40655 526ee887c4d5 sparse-revlog: stop using a heap to track selected gap Boris Feld <boris.feld@octobus.net> parents: 40654 diff changeset	409 selected.append(gapidx)
34824 e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	410
34880 9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	411 # the gap sizes are stored as negatives to be sorted decreasingly
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	412 # by the heap
40654 54de23400b2a sparse-revlog: stop using a heap to track gaps Boris Feld <boris.feld@octobus.net> parents: 40653 diff changeset	413 readdata -= gapsize
34880 9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	414 if readdata > 0:
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	415 density = chainpayload / float(readdata)
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	416 else:
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	417 density = 1.0
40655 526ee887c4d5 sparse-revlog: stop using a heap to track selected gap Boris Feld <boris.feld@octobus.net> parents: 40654 diff changeset	418 selected.sort()
34824 e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	419
34880 9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	420 # Cut the revs at collected indices
9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	421 previdx = 0
40655 526ee887c4d5 sparse-revlog: stop using a heap to track selected gap Boris Feld <boris.feld@octobus.net> parents: 40654 diff changeset	422 for idx in selected:
34898 1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk Paul Morelle <paul.morelle@octobus.net> parents: 34881 diff changeset	423
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk Paul Morelle <paul.morelle@octobus.net> parents: 34881 diff changeset	424 chunk = _trimchunk(revlog, revs, previdx, idx)
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk Paul Morelle <paul.morelle@octobus.net> parents: 34881 diff changeset	425 if chunk:
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk Paul Morelle <paul.morelle@octobus.net> parents: 34881 diff changeset	426 yield chunk
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk Paul Morelle <paul.morelle@octobus.net> parents: 34881 diff changeset	427
34880 9e18ab7f7240 sparse-read: move from a recursive-based approach to a heap-based one Boris Feld <boris.feld@octobus.net> parents: 34825 diff changeset	428 previdx = idx
34898 1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk Paul Morelle <paul.morelle@octobus.net> parents: 34881 diff changeset	429
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk Paul Morelle <paul.morelle@octobus.net> parents: 34881 diff changeset	430 chunk = _trimchunk(revlog, revs, previdx)
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk Paul Morelle <paul.morelle@octobus.net> parents: 34881 diff changeset	431 if chunk:
1bde8e8e5de0 sparse-read: ignore trailing empty revs in each read chunk Paul Morelle <paul.morelle@octobus.net> parents: 34881 diff changeset	432 yield chunk
34824 e2ad93bcc084 revlog: introduce an experimental flag to slice chunks reads when too sparse Paul Morelle <paul.morelle@octobus.net> parents: 34823 diff changeset	433
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	434
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	435 def _trimchunk(revlog, revs, startidx, endidx=None):
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	436 """returns revs[startidx:endidx] without empty trailing revs
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	437
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	438 Doctest Setup
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	439 >>> revlog = _testrevlog([
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	440 ... 5, #0
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	441 ... 10, #1
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	442 ... 12, #2
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	443 ... 12, #3 (empty)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	444 ... 17, #4
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	445 ... 21, #5
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	446 ... 21, #6 (empty)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	447 ... ])
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	448
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	449 Contiguous cases:
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	450 >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 0)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	451 [0, 1, 2, 3, 4, 5]
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	452 >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 0, 5)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	453 [0, 1, 2, 3, 4]
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	454 >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 0, 4)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	455 [0, 1, 2]
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	456 >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 2, 4)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	457 [2]
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	458 >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 3)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	459 [3, 4, 5]
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	460 >>> _trimchunk(revlog, [0, 1, 2, 3, 4, 5, 6], 3, 5)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	461 [3, 4]
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	462
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	463 Discontiguous cases:
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	464 >>> _trimchunk(revlog, [1, 3, 5, 6], 0)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	465 [1, 3, 5]
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	466 >>> _trimchunk(revlog, [1, 3, 5, 6], 0, 2)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	467 [1]
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	468 >>> _trimchunk(revlog, [1, 3, 5, 6], 1, 3)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	469 [3, 5]
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	470 >>> _trimchunk(revlog, [1, 3, 5, 6], 1)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	471 [3, 5]
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	472 """
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	473 length = revlog.length
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	474
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	475 if endidx is None:
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	476 endidx = len(revs)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	477
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	478 # If we have a non-emtpy delta candidate, there are nothing to trim
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	479 if revs[endidx - 1] < len(revlog):
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	480 # Trim empty revs at the end, except the very first revision of a chain
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	481 while (
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	482 endidx > 1 and endidx > startidx and length(revs[endidx - 1]) == 0
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	483 ):
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	484 endidx -= 1
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	485
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	486 return revs[startidx:endidx]
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	487
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	488
40652 a32ccd32982b sparse-revlog: drop unused deltainfo parameter from segmentspan Boris Feld <boris.feld@octobus.net> parents: 40651 diff changeset	489 def segmentspan(revlog, revs):
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	490 """Get the byte span of a segment of revisions
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	491
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	492 revs is a sorted array of revision numbers
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	493
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	494 >>> revlog = _testrevlog([
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	495 ... 5, #0
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	496 ... 10, #1
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	497 ... 12, #2
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	498 ... 12, #3 (empty)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	499 ... 17, #4
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	500 ... ])
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	501
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	502 >>> segmentspan(revlog, [0, 1, 2, 3, 4])
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	503 17
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	504 >>> segmentspan(revlog, [0, 4])
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	505 17
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	506 >>> segmentspan(revlog, [3, 4])
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	507 5
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	508 >>> segmentspan(revlog, [1, 2, 3,])
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	509 7
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	510 >>> segmentspan(revlog, [1, 3])
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	511 7
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	512 """
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	513 if not revs:
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	514 return 0
40652 a32ccd32982b sparse-revlog: drop unused deltainfo parameter from segmentspan Boris Feld <boris.feld@octobus.net> parents: 40651 diff changeset	515 end = revlog.end(revs[-1])
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	516 return end - revlog.start(revs[0])
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	517
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	518
39358 fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	519 def _textfromdelta(fh, revlog, baserev, delta, p1, p2, flags, expectednode):
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	520 """build full text from a (base, delta) pair and other metadata"""
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	521 # special case deltas which replace entire base; no need to decode
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	522 # base revision. this neatly avoids censored bases, which throw when
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	523 # they're decoded.
43077 687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals Augie Fackler <augie@google.com> parents: 43076 diff changeset	524 hlen = struct.calcsize(b">lll")
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	525 if delta[:hlen] == mdiff.replacediffheader(
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	526 revlog.rawsize(baserev), len(delta) - hlen
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	527 ):
39358 fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	528 fulltext = delta[hlen:]
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	529 else:
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	530 # deltabase is rawtext before changed by flag processors, which is
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	531 # equivalent to non-raw text
48564 c514936d92b4 revlog: remove deprecated APIs Rapha?l Gom?s <rgomes@octobus.net> parents: 47463 diff changeset	532 basetext = revlog.revision(baserev, _df=fh)
39358 fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	533 fulltext = mdiff.patch(basetext, delta)
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	534
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	535 try:
42994 dff95420480f flagprocessors: make `processflagsraw` a module level function Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42884 diff changeset	536 validatehash = flagutil.processflagsraw(revlog, fulltext, flags)
39358 fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	537 if validatehash:
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	538 revlog.checkhash(fulltext, expectednode, p1=p1, p2=p2)
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	539 if flags & REVIDX_ISCENSORED:
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	540 raise error.StorageError(
43077 687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals Augie Fackler <augie@google.com> parents: 43076 diff changeset	541 _(b'node %s is not censored') % expectednode
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	542 )
39790 4a2466b2a434 revlog: drop some more error aliases (API) Gregory Szorc <gregory.szorc@gmail.com> parents: 39789 diff changeset	543 except error.CensoredNodeError:
39358 fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	544 # must pass the censored index flag to add censored revisions
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	545 if not flags & REVIDX_ISCENSORED:
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	546 raise
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	547 return fulltext
fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	548
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	549
35638 edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta' Paul Morelle <paul.morelle@octobus.net> parents: 35637 diff changeset	550 @attr.s(slots=True, frozen=True)
49037 642e31cb55f0 py3: use class X: instead of class X(object): Gregory Szorc <gregory.szorc@gmail.com> parents: 48966 diff changeset	551 class _deltainfo:
35638 edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta' Paul Morelle <paul.morelle@octobus.net> parents: 35637 diff changeset	552 distance = attr.ib()
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta' Paul Morelle <paul.morelle@octobus.net> parents: 35637 diff changeset	553 deltalen = attr.ib()
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta' Paul Morelle <paul.morelle@octobus.net> parents: 35637 diff changeset	554 data = attr.ib()
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta' Paul Morelle <paul.morelle@octobus.net> parents: 35637 diff changeset	555 base = attr.ib()
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta' Paul Morelle <paul.morelle@octobus.net> parents: 35637 diff changeset	556 chainbase = attr.ib()
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta' Paul Morelle <paul.morelle@octobus.net> parents: 35637 diff changeset	557 chainlen = attr.ib()
edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta' Paul Morelle <paul.morelle@octobus.net> parents: 35637 diff changeset	558 compresseddeltalen = attr.ib()
39187 e0da43e2f71f revlog: compute snapshot depth on delta info Boris Feld <boris.feld@octobus.net> parents: 39185 diff changeset	559 snapshotdepth = attr.ib()
35638 edc9330acac1 revlog: introduce 'deltainfo' to distinguish from 'delta' Paul Morelle <paul.morelle@octobus.net> parents: 35637 diff changeset	560
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	561
47264 b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	562 def drop_u_compression(delta):
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	563 """turn into a "u" (no-compression) into no-compression without header
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	564
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	565 This is useful for revlog format that has better compression method.
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	566 """
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	567 assert delta.data[0] == b'u', delta.data[0]
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	568 return _deltainfo(
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	569 delta.distance,
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	570 delta.deltalen - 1,
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	571 (b'', delta.data[1]),
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	572 delta.base,
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	573 delta.chainbase,
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	574 delta.chainlen,
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	575 delta.compresseddeltalen,
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	576 delta.snapshotdepth,
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	577 )
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	578
b876f0bf7366 revlog: introduce a plain compression mode Pierre-Yves David <pierre-yves.david@octobus.net> parents: 46819 diff changeset	579
49788 5af4a0a73e4c find-delta: rename _isgooddeltainfo Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49772 diff changeset	580 def is_good_delta_info(revlog, deltainfo, revinfo):
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	581 """Returns True if the given delta is good. Good means that it is within
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	582 the disk span, disk size, and chain length bounds that we know to be
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	583 performant."""
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	584 if deltainfo is None:
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	585 return False
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	586
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	587 # - 'deltainfo.distance' is the distance from the base revision --
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	588 # bounding it limits the amount of I/O we need to do.
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	589 # - 'deltainfo.compresseddeltalen' is the sum of the total size of
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	590 # deltas we need to apply -- bounding it limits the amount of CPU
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	591 # we consume.
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	592
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	593 textlen = revinfo.textlen
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	594 defaultmax = textlen * 4
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	595 maxdist = revlog._maxdeltachainspan
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	596 if not maxdist:
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	597 maxdist = deltainfo.distance # ensure the conditional pass
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	598 maxdist = max(maxdist, defaultmax)
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	599
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	600 # Bad delta from read span:
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	601 #
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	602 # If the span of data read is larger than the maximum allowed.
40650 2f7e531ef3e7 sparse-revlog: skip the span check in the sparse-revlog case Boris Feld <boris.feld@octobus.net> parents: 40425 diff changeset	603 #
2f7e531ef3e7 sparse-revlog: skip the span check in the sparse-revlog case Boris Feld <boris.feld@octobus.net> parents: 40425 diff changeset	604 # In the sparse-revlog case, we rely on the associated "sparse reading"
2f7e531ef3e7 sparse-revlog: skip the span check in the sparse-revlog case Boris Feld <boris.feld@octobus.net> parents: 40425 diff changeset	605 # to avoid issue related to the span of data. In theory, it would be
2f7e531ef3e7 sparse-revlog: skip the span check in the sparse-revlog case Boris Feld <boris.feld@octobus.net> parents: 40425 diff changeset	606 # possible to build pathological revlog where delta pattern would lead
2f7e531ef3e7 sparse-revlog: skip the span check in the sparse-revlog case Boris Feld <boris.feld@octobus.net> parents: 40425 diff changeset	607 # to too many reads. However, they do not happen in practice at all. So
2f7e531ef3e7 sparse-revlog: skip the span check in the sparse-revlog case Boris Feld <boris.feld@octobus.net> parents: 40425 diff changeset	608 # we skip the span check entirely.
2f7e531ef3e7 sparse-revlog: skip the span check in the sparse-revlog case Boris Feld <boris.feld@octobus.net> parents: 40425 diff changeset	609 if not revlog._sparserevlog and maxdist < deltainfo.distance:
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	610 return False
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	611
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	612 # Bad delta from new delta size:
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	613 #
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	614 # If the delta size is larger than the target text, storing the
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	615 # delta will be inefficient.
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	616 if textlen < deltainfo.deltalen:
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	617 return False
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	618
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	619 # Bad delta from cumulated payload size:
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	620 #
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	621 # If the sum of delta get larger than K * target text length.
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	622 if textlen * LIMIT_DELTA2TEXT < deltainfo.compresseddeltalen:
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	623 return False
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	624
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	625 # Bad delta from chain length:
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	626 #
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	627 # If the number of delta in the chain gets too high.
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	628 if revlog._maxchainlen and revlog._maxchainlen < deltainfo.chainlen:
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	629 return False
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	630
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	631 # bad delta from intermediate snapshot size limit
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	632 #
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	633 # If an intermediate snapshot size is higher than the limit. The
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	634 # limit exist to prevent endless chain of intermediate delta to be
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	635 # created.
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	636 if (
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	637 deltainfo.snapshotdepth is not None
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	638 and (textlen >> deltainfo.snapshotdepth) < deltainfo.deltalen
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	639 ):
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	640 return False
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	641
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	642 # bad delta if new intermediate snapshot is larger than the previous
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	643 # snapshot
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	644 if (
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	645 deltainfo.snapshotdepth
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	646 and revlog.length(deltainfo.base) < deltainfo.deltalen
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	647 ):
39357 655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	648 return False
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	649
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	650 return True
655b5b465953 revlog: split functionality related to deltas computation in a new module Boris Feld <boris.feld@octobus.net> parents: 39356 diff changeset	651
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	652
40991 42f59d3f714d delta: exclude base candidate much smaller than the target Boris Feld <boris.feld@octobus.net> parents: 40970 diff changeset	653 # If a revision's full text is that much bigger than a base candidate full
42f59d3f714d delta: exclude base candidate much smaller than the target Boris Feld <boris.feld@octobus.net> parents: 40970 diff changeset	654 # text's, it is very unlikely that it will produce a valid delta. We no longer
42f59d3f714d delta: exclude base candidate much smaller than the target Boris Feld <boris.feld@octobus.net> parents: 40970 diff changeset	655 # consider these candidates.
41036 b373477948df revlog: limit base to rev size ratio to 500 instead of 50 Boris Feld <boris.feld@octobus.net> parents: 40992 diff changeset	656 LIMIT_BASE2TEXT = 500
40991 42f59d3f714d delta: exclude base candidate much smaller than the target Boris Feld <boris.feld@octobus.net> parents: 40970 diff changeset	657
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	658
49740 2afee2176775 delta-find: expand a function definition and call before extendin it Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49739 diff changeset	659 def _candidategroups(
2afee2176775 delta-find: expand a function definition and call before extendin it Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49739 diff changeset	660 revlog,
2afee2176775 delta-find: expand a function definition and call before extendin it Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49739 diff changeset	661 textlen,
2afee2176775 delta-find: expand a function definition and call before extendin it Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49739 diff changeset	662 p1,
2afee2176775 delta-find: expand a function definition and call before extendin it Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49739 diff changeset	663 p2,
2afee2176775 delta-find: expand a function definition and call before extendin it Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49739 diff changeset	664 cachedelta,
49741 e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49740 diff changeset	665 excluded_bases=None,
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49740 diff changeset	666 target_rev=None,
49740 2afee2176775 delta-find: expand a function definition and call before extendin it Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49739 diff changeset	667 ):
39363 1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	668 """Provides group of revision to be tested as delta base
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	669
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	670 This top level function focus on emitting groups with unique and worthwhile
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	671 content. See _raw_candidate_groups for details about the group order.
39361 507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function Boris Feld <boris.feld@octobus.net> parents: 39360 diff changeset	672 """
39363 1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	673 # should we try to build a delta?
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	674 if not (len(revlog) and revlog._storedeltachains):
39514 5b308a4e6d03 snapshot: use None as a stop value when looking for a good delta Boris Feld <boris.feld@octobus.net> parents: 39513 diff changeset	675 yield None
39363 1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	676 return
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	677
39364 37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	678 deltalength = revlog.length
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	679 deltaparent = revlog.deltaparent
40991 42f59d3f714d delta: exclude base candidate much smaller than the target Boris Feld <boris.feld@octobus.net> parents: 40970 diff changeset	680 sparse = revlog._sparserevlog
39515 04b75f3a3f2a snapshot: add refining logic at the findeltainfo level Boris Feld <boris.feld@octobus.net> parents: 39514 diff changeset	681 good = None
39364 37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	682
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	683 deltas_limit = textlen * LIMIT_DELTA2TEXT
49772 f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	684 group_chunk_size = revlog._candidate_group_chunk_size
39364 37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	685
42057 566daffc607d cleanup: use set literals where possible Martin von Zweigbergk <martinvonz@google.com> parents: 41824 diff changeset	686 tested = {nullrev}
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	687 candidates = _refinedgroups(
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	688 revlog,
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	689 p1,
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	690 p2,
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	691 cachedelta,
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	692 )
39516 51cec7fb672e snapshot: also use None as a stop value for `_refinegroup` Boris Feld <boris.feld@octobus.net> parents: 39515 diff changeset	693 while True:
39517 cc85ebb68ff9 snapshot: turn _refinedgroups into a coroutine Boris Feld <boris.feld@octobus.net> parents: 39516 diff changeset	694 temptative = candidates.send(good)
39516 51cec7fb672e snapshot: also use None as a stop value for `_refinegroup` Boris Feld <boris.feld@octobus.net> parents: 39515 diff changeset	695 if temptative is None:
51cec7fb672e snapshot: also use None as a stop value for `_refinegroup` Boris Feld <boris.feld@octobus.net> parents: 39515 diff changeset	696 break
39364 37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	697 group = []
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	698 for rev in temptative:
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	699 # skip over empty delta (no need to include them in a chain)
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	700 while revlog._generaldelta and not (
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	701 rev == nullrev or rev in tested or deltalength(rev)
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	702 ):
39610 bdb41eaa8b59 snapshot: fix line order when skipping over empty deltas Boris Feld <boris.feld@octobus.net> parents: 39522 diff changeset	703 tested.add(rev)
39364 37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	704 rev = deltaparent(rev)
40970 f960c51eebf3 delta: filter nullrev out first Boris Feld <boris.feld@octobus.net> parents: 40748 diff changeset	705 # no need to try a delta against nullrev, this will be done as a
f960c51eebf3 delta: filter nullrev out first Boris Feld <boris.feld@octobus.net> parents: 40748 diff changeset	706 # last resort.
f960c51eebf3 delta: filter nullrev out first Boris Feld <boris.feld@octobus.net> parents: 40748 diff changeset	707 if rev == nullrev:
f960c51eebf3 delta: filter nullrev out first Boris Feld <boris.feld@octobus.net> parents: 40748 diff changeset	708 continue
39364 37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	709 # filter out revision we tested already
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	710 if rev in tested:
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	711 continue
49741 e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49740 diff changeset	712 # an higher authority deamed the base unworthy (e.g. censored)
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49740 diff changeset	713 if excluded_bases is not None and rev in excluded_bases:
49744 4956942c0416 delta-find: adjust the moment when we mark something as "tested" Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49743 diff changeset	714 tested.add(rev)
49741 e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49740 diff changeset	715 continue
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49740 diff changeset	716 # We are in some recomputation cases and that rev is too high in
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49740 diff changeset	717 # the revlog
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49740 diff changeset	718 if target_rev is not None and rev >= target_rev:
49744 4956942c0416 delta-find: adjust the moment when we mark something as "tested" Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49743 diff changeset	719 tested.add(rev)
49741 e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49740 diff changeset	720 continue
39364 37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	721 # filter out delta base that will never produce good delta
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	722 if deltas_limit < revlog.length(rev):
49744 4956942c0416 delta-find: adjust the moment when we mark something as "tested" Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49743 diff changeset	723 tested.add(rev)
39364 37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	724 continue
40991 42f59d3f714d delta: exclude base candidate much smaller than the target Boris Feld <boris.feld@octobus.net> parents: 40970 diff changeset	725 if sparse and revlog.rawsize(rev) < (textlen // LIMIT_BASE2TEXT):
49744 4956942c0416 delta-find: adjust the moment when we mark something as "tested" Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49743 diff changeset	726 tested.add(rev)
40991 42f59d3f714d delta: exclude base candidate much smaller than the target Boris Feld <boris.feld@octobus.net> parents: 40970 diff changeset	727 continue
39364 37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	728 # no delta for rawtext-changing revs (see "candelta" for why)
37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	729 if revlog.flags(rev) & REVIDX_RAWTEXT_CHANGING_FLAGS:
49744 4956942c0416 delta-find: adjust the moment when we mark something as "tested" Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49743 diff changeset	730 tested.add(rev)
39364 37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	731 continue
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	732
40992 ba09db267cb6 delta: ignore base whose chains already don't match expectations Boris Feld <boris.feld@octobus.net> parents: 40991 diff changeset	733 # If we reach here, we are about to build and test a delta.
ba09db267cb6 delta: ignore base whose chains already don't match expectations Boris Feld <boris.feld@octobus.net> parents: 40991 diff changeset	734 # The delta building process will compute the chaininfo in all
ba09db267cb6 delta: ignore base whose chains already don't match expectations Boris Feld <boris.feld@octobus.net> parents: 40991 diff changeset	735 # case, since that computation is cached, it is fine to access it
ba09db267cb6 delta: ignore base whose chains already don't match expectations Boris Feld <boris.feld@octobus.net> parents: 40991 diff changeset	736 # here too.
ba09db267cb6 delta: ignore base whose chains already don't match expectations Boris Feld <boris.feld@octobus.net> parents: 40991 diff changeset	737 chainlen, chainsize = revlog._chaininfo(rev)
ba09db267cb6 delta: ignore base whose chains already don't match expectations Boris Feld <boris.feld@octobus.net> parents: 40991 diff changeset	738 # if chain will be too long, skip base
ba09db267cb6 delta: ignore base whose chains already don't match expectations Boris Feld <boris.feld@octobus.net> parents: 40991 diff changeset	739 if revlog._maxchainlen and chainlen >= revlog._maxchainlen:
49744 4956942c0416 delta-find: adjust the moment when we mark something as "tested" Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49743 diff changeset	740 tested.add(rev)
40992 ba09db267cb6 delta: ignore base whose chains already don't match expectations Boris Feld <boris.feld@octobus.net> parents: 40991 diff changeset	741 continue
ba09db267cb6 delta: ignore base whose chains already don't match expectations Boris Feld <boris.feld@octobus.net> parents: 40991 diff changeset	742 # if chain already have too much data, skip base
ba09db267cb6 delta: ignore base whose chains already don't match expectations Boris Feld <boris.feld@octobus.net> parents: 40991 diff changeset	743 if deltas_limit < chainsize:
49744 4956942c0416 delta-find: adjust the moment when we mark something as "tested" Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49743 diff changeset	744 tested.add(rev)
40992 ba09db267cb6 delta: ignore base whose chains already don't match expectations Boris Feld <boris.feld@octobus.net> parents: 40991 diff changeset	745 continue
42479 a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	746 if sparse and revlog.upperboundcomp is not None:
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	747 maxcomp = revlog.upperboundcomp
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	748 basenotsnap = (p1, p2, nullrev)
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	749 if rev not in basenotsnap and revlog.issnapshot(rev):
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	750 snapshotdepth = revlog.snapshotdepth(rev)
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	751 # If text is significantly larger than the base, we can
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	752 # expect the resulting delta to be proportional to the size
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	753 # difference
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	754 revsize = revlog.rawsize(rev)
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	755 rawsizedistance = max(textlen - revsize, 0)
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	756 # use an estimate of the compression upper bound.
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	757 lowestrealisticdeltalen = rawsizedistance // maxcomp
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	758
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	759 # check the absolute constraint on the delta size
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	760 snapshotlimit = textlen >> snapshotdepth
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	761 if snapshotlimit < lowestrealisticdeltalen:
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	762 # delta lower bound is larger than accepted upper bound
49744 4956942c0416 delta-find: adjust the moment when we mark something as "tested" Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49743 diff changeset	763 tested.add(rev)
42479 a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	764 continue
a0b26fc8fbba deltas: skip if projected delta size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42057 diff changeset	765
42480 66c27df1be84 deltas: skip if projected delta size is bigger than previous snapshot Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42479 diff changeset	766 # check the relative constraint on the delta size
66c27df1be84 deltas: skip if projected delta size is bigger than previous snapshot Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42479 diff changeset	767 revlength = revlog.length(rev)
66c27df1be84 deltas: skip if projected delta size is bigger than previous snapshot Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42479 diff changeset	768 if revlength < lowestrealisticdeltalen:
66c27df1be84 deltas: skip if projected delta size is bigger than previous snapshot Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42479 diff changeset	769 # delta probable lower bound is larger than target base
49744 4956942c0416 delta-find: adjust the moment when we mark something as "tested" Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49743 diff changeset	770 tested.add(rev)
42480 66c27df1be84 deltas: skip if projected delta size is bigger than previous snapshot Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42479 diff changeset	771 continue
66c27df1be84 deltas: skip if projected delta size is bigger than previous snapshot Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42479 diff changeset	772
39364 37957e07138c revlogdeltas: move finddeltainfo filtering inside _candidategroups Boris Feld <boris.feld@octobus.net> parents: 39363 diff changeset	773 group.append(rev)
39363 1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	774 if group:
49772 f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	775 # When the size of the candidate group is big, it can result in a
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	776 # quite significant performance impact. To reduce this, we can send
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	777 # them in smaller batches until the new batch does not provide any
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	778 # improvements.
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	779 #
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	780 # This might reduce the overall efficiency of the compression in
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	781 # some corner cases, but that should also prevent very pathological
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	782 # cases from being an issue. (eg. 20 000 candidates).
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	783 #
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	784 # XXX note that the ordering of the group becomes important as it
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	785 # now impacts the final result. The current order is unprocessed
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	786 # and can be improved.
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	787 if group_chunk_size == 0:
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	788 tested.update(group)
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	789 good = yield tuple(group)
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	790 else:
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	791 prev_good = good
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	792 for start in range(0, len(group), group_chunk_size):
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	793 sub_group = group[start : start + group_chunk_size]
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	794 tested.update(sub_group)
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	795 good = yield tuple(sub_group)
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	796 if prev_good == good:
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	797 break
f5f113f1b011 delta-find: add a way to control the number of bases tested at the same time Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49744 diff changeset	798
39514 5b308a4e6d03 snapshot: use None as a stop value when looking for a good delta Boris Feld <boris.feld@octobus.net> parents: 39513 diff changeset	799 yield None
39363 1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	800
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	801
39513 2f9f7889549b snapshot: introduce an intermediate `_refinedgroups` generator Boris Feld <boris.feld@octobus.net> parents: 39512 diff changeset	802 def _refinedgroups(revlog, p1, p2, cachedelta):
2f9f7889549b snapshot: introduce an intermediate `_refinedgroups` generator Boris Feld <boris.feld@octobus.net> parents: 39512 diff changeset	803 good = None
39518 993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source Boris Feld <boris.feld@octobus.net> parents: 39517 diff changeset	804 # First we try to reuse a the delta contained in the bundle.
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source Boris Feld <boris.feld@octobus.net> parents: 39517 diff changeset	805 # (or from the source revlog)
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source Boris Feld <boris.feld@octobus.net> parents: 39517 diff changeset	806 #
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source Boris Feld <boris.feld@octobus.net> parents: 39517 diff changeset	807 # This logic only applies to general delta repositories and can be disabled
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source Boris Feld <boris.feld@octobus.net> parents: 39517 diff changeset	808 # through configuration. Disabling reuse source delta is useful when
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source Boris Feld <boris.feld@octobus.net> parents: 39517 diff changeset	809 # we want to make sure we recomputed "optimal" deltas.
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	810 debug_info = None
49791 05db41701ece find-delta: pass the cache-delta usage policy alongside the cache-delta Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49789 diff changeset	811 if cachedelta is not None and cachedelta[2] > DELTA_BASE_REUSE_NO:
39518 993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source Boris Feld <boris.feld@octobus.net> parents: 39517 diff changeset	812 # Assume what we received from the server is a good choice
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source Boris Feld <boris.feld@octobus.net> parents: 39517 diff changeset	813 # build delta will reuse the cache
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	814 if debug_info is not None:
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	815 debug_info['cached-delta.tested'] += 1
39518 993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source Boris Feld <boris.feld@octobus.net> parents: 39517 diff changeset	816 good = yield (cachedelta[0],)
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source Boris Feld <boris.feld@octobus.net> parents: 39517 diff changeset	817 if good is not None:
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	818 if debug_info is not None:
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	819 debug_info['cached-delta.accepted'] += 1
39518 993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source Boris Feld <boris.feld@octobus.net> parents: 39517 diff changeset	820 yield None
993d7e2c8b79 snapshot: make sure we'll never refine delta base from a reused source Boris Feld <boris.feld@octobus.net> parents: 39517 diff changeset	821 return
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	822 # XXX cache me higher
49792 efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	823 snapshot_cache = SnapshotCache()
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	824 groups = _rawgroups(
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	825 revlog,
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	826 p1,
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	827 p2,
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	828 cachedelta,
49792 efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	829 snapshot_cache,
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	830 )
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	831 for candidates in groups:
39513 2f9f7889549b snapshot: introduce an intermediate `_refinedgroups` generator Boris Feld <boris.feld@octobus.net> parents: 39512 diff changeset	832 good = yield candidates
2f9f7889549b snapshot: introduce an intermediate `_refinedgroups` generator Boris Feld <boris.feld@octobus.net> parents: 39512 diff changeset	833 if good is not None:
2f9f7889549b snapshot: introduce an intermediate `_refinedgroups` generator Boris Feld <boris.feld@octobus.net> parents: 39512 diff changeset	834 break
39519 e4d4361d0bcd snapshot: try to refine new snapshot base down the chain Boris Feld <boris.feld@octobus.net> parents: 39518 diff changeset	835
40415 bafa1c4bb7a8 sparse-revlog: only refine delta candidates in the sparse case (issue6006) Boris Feld <boris.feld@octobus.net> parents: 39793 diff changeset	836 # If sparse revlog is enabled, we can try to refine the available deltas
bafa1c4bb7a8 sparse-revlog: only refine delta candidates in the sparse case (issue6006) Boris Feld <boris.feld@octobus.net> parents: 39793 diff changeset	837 if not revlog._sparserevlog:
bafa1c4bb7a8 sparse-revlog: only refine delta candidates in the sparse case (issue6006) Boris Feld <boris.feld@octobus.net> parents: 39793 diff changeset	838 yield None
bafa1c4bb7a8 sparse-revlog: only refine delta candidates in the sparse case (issue6006) Boris Feld <boris.feld@octobus.net> parents: 39793 diff changeset	839 return
bafa1c4bb7a8 sparse-revlog: only refine delta candidates in the sparse case (issue6006) Boris Feld <boris.feld@octobus.net> parents: 39793 diff changeset	840
39519 e4d4361d0bcd snapshot: try to refine new snapshot base down the chain Boris Feld <boris.feld@octobus.net> parents: 39518 diff changeset	841 # if we have a refinable value, try to refine it
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain Boris Feld <boris.feld@octobus.net> parents: 39518 diff changeset	842 if good is not None and good not in (p1, p2) and revlog.issnapshot(good):
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain Boris Feld <boris.feld@octobus.net> parents: 39518 diff changeset	843 # refine snapshot down
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain Boris Feld <boris.feld@octobus.net> parents: 39518 diff changeset	844 previous = None
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain Boris Feld <boris.feld@octobus.net> parents: 39518 diff changeset	845 while previous != good:
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain Boris Feld <boris.feld@octobus.net> parents: 39518 diff changeset	846 previous = good
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain Boris Feld <boris.feld@octobus.net> parents: 39518 diff changeset	847 base = revlog.deltaparent(good)
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain Boris Feld <boris.feld@octobus.net> parents: 39518 diff changeset	848 if base == nullrev:
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain Boris Feld <boris.feld@octobus.net> parents: 39518 diff changeset	849 break
e4d4361d0bcd snapshot: try to refine new snapshot base down the chain Boris Feld <boris.feld@octobus.net> parents: 39518 diff changeset	850 good = yield (base,)
39520 5aef5afa8654 snapshot: refine candidate snapshot base upward Boris Feld <boris.feld@octobus.net> parents: 39519 diff changeset	851 # refine snapshot up
49792 efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	852 if not snapshot_cache.snapshots:
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	853 snapshot_cache.update(revlog, good + 1)
39520 5aef5afa8654 snapshot: refine candidate snapshot base upward Boris Feld <boris.feld@octobus.net> parents: 39519 diff changeset	854 previous = None
5aef5afa8654 snapshot: refine candidate snapshot base upward Boris Feld <boris.feld@octobus.net> parents: 39519 diff changeset	855 while good != previous:
5aef5afa8654 snapshot: refine candidate snapshot base upward Boris Feld <boris.feld@octobus.net> parents: 39519 diff changeset	856 previous = good
49792 efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	857 children = tuple(sorted(c for c in snapshot_cache.snapshots[good]))
39520 5aef5afa8654 snapshot: refine candidate snapshot base upward Boris Feld <boris.feld@octobus.net> parents: 39519 diff changeset	858 good = yield children
5aef5afa8654 snapshot: refine candidate snapshot base upward Boris Feld <boris.feld@octobus.net> parents: 39519 diff changeset	859
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	860 if debug_info is not None:
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	861 if good is None:
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	862 debug_info['no-solution'] += 1
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	863
39516 51cec7fb672e snapshot: also use None as a stop value for `_refinegroup` Boris Feld <boris.feld@octobus.net> parents: 39515 diff changeset	864 yield None
39513 2f9f7889549b snapshot: introduce an intermediate `_refinedgroups` generator Boris Feld <boris.feld@octobus.net> parents: 39512 diff changeset	865
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	866
49792 efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	867 def _rawgroups(revlog, p1, p2, cachedelta, snapshot_cache=None):
39363 1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	868 """Provides group of revision to be tested as delta base
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	869
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	870 This lower level function focus on emitting delta theorically interresting
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	871 without looking it any practical details.
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	872
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	873 The group order aims at providing fast or small candidates first.
39361 507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function Boris Feld <boris.feld@octobus.net> parents: 39360 diff changeset	874 """
507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function Boris Feld <boris.feld@octobus.net> parents: 39360 diff changeset	875 gdelta = revlog._generaldelta
41312 189e06b2d719 revlog: make sure we never use sparserevlog without general delta (issue6056) Boris Feld <boris.feld@octobus.net> parents: 41112 diff changeset	876 # gate sparse behind general-delta because of issue6056
189e06b2d719 revlog: make sure we never use sparserevlog without general delta (issue6056) Boris Feld <boris.feld@octobus.net> parents: 41112 diff changeset	877 sparse = gdelta and revlog._sparserevlog
39361 507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function Boris Feld <boris.feld@octobus.net> parents: 39360 diff changeset	878 curr = len(revlog)
507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function Boris Feld <boris.feld@octobus.net> parents: 39360 diff changeset	879 prev = curr - 1
39509 a33f394b2bfd snapshot: try intermediate snapshot against parents' base Boris Feld <boris.feld@octobus.net> parents: 39505 diff changeset	880 deltachain = lambda rev: revlog._deltachain(rev)[0]
39361 507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function Boris Feld <boris.feld@octobus.net> parents: 39360 diff changeset	881
39363 1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	882 if gdelta:
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	883 # exclude already lazy tested base if any
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	884 parents = [p for p in (p1, p2) if p != nullrev]
39361 507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function Boris Feld <boris.feld@octobus.net> parents: 39360 diff changeset	885
39363 1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	886 if not revlog._deltabothparents and len(parents) == 2:
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	887 parents.sort()
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	888 # To minimize the chance of having to build a fulltext,
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	889 # pick first whichever parent is closest to us (max rev)
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	890 yield (parents[1],)
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	891 # then the other one (min rev) if the first did not fit
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	892 yield (parents[0],)
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	893 elif len(parents) > 0:
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	894 # Test all parents (1 or 2), and keep the best candidate
1c6ff52fe9cf revlogdeltas: split candidate groups selection from the filtering logic Boris Feld <boris.feld@octobus.net> parents: 39362 diff changeset	895 yield parents
39361 507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function Boris Feld <boris.feld@octobus.net> parents: 39360 diff changeset	896
39509 a33f394b2bfd snapshot: try intermediate snapshot against parents' base Boris Feld <boris.feld@octobus.net> parents: 39505 diff changeset	897 if sparse and parents:
49792 efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	898 if snapshot_cache is None:
49742 5447c1507c86 delta-find: small documentation update Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49741 diff changeset	899 # map: base-rev: [snapshot-revs]
49792 efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	900 snapshot_cache = SnapshotCache()
39509 a33f394b2bfd snapshot: try intermediate snapshot against parents' base Boris Feld <boris.feld@octobus.net> parents: 39505 diff changeset	901 # See if we can use an existing snapshot in the parent chains to use as
a33f394b2bfd snapshot: try intermediate snapshot against parents' base Boris Feld <boris.feld@octobus.net> parents: 39505 diff changeset	902 # a base for a new intermediate-snapshot
39511 e72130f58f5d snapshot: consider all snapshots in the parents' chains Boris Feld <boris.feld@octobus.net> parents: 39510 diff changeset	903 #
e72130f58f5d snapshot: consider all snapshots in the parents' chains Boris Feld <boris.feld@octobus.net> parents: 39510 diff changeset	904 # search for snapshot in parents delta chain
e72130f58f5d snapshot: consider all snapshots in the parents' chains Boris Feld <boris.feld@octobus.net> parents: 39510 diff changeset	905 # map: snapshot-level: snapshot-rev
e72130f58f5d snapshot: consider all snapshots in the parents' chains Boris Feld <boris.feld@octobus.net> parents: 39510 diff changeset	906 parents_snaps = collections.defaultdict(set)
39521 05a165dc4f55 snapshot: extract parent chain computation Boris Feld <boris.feld@octobus.net> parents: 39520 diff changeset	907 candidate_chains = [deltachain(p) for p in parents]
05a165dc4f55 snapshot: extract parent chain computation Boris Feld <boris.feld@octobus.net> parents: 39520 diff changeset	908 for chain in candidate_chains:
05a165dc4f55 snapshot: extract parent chain computation Boris Feld <boris.feld@octobus.net> parents: 39520 diff changeset	909 for idx, s in enumerate(chain):
39511 e72130f58f5d snapshot: consider all snapshots in the parents' chains Boris Feld <boris.feld@octobus.net> parents: 39510 diff changeset	910 if not revlog.issnapshot(s):
e72130f58f5d snapshot: consider all snapshots in the parents' chains Boris Feld <boris.feld@octobus.net> parents: 39510 diff changeset	911 break
e72130f58f5d snapshot: consider all snapshots in the parents' chains Boris Feld <boris.feld@octobus.net> parents: 39510 diff changeset	912 parents_snaps[idx].add(s)
39512 6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	913 snapfloor = min(parents_snaps[0]) + 1
49792 efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	914 snapshot_cache.update(revlog, snapfloor)
39522 c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	915 # search for the highest "unrelated" revision
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	916 #
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	917 # Adding snapshots used by "unrelated" revision increase the odd we
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	918 # reuse an independant, yet better snapshot chain.
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	919 #
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	920 # XXX instead of building a set of revisions, we could lazily enumerate
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	921 # over the chains. That would be more efficient, however we stick to
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	922 # simple code for now.
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	923 all_revs = set()
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	924 for chain in candidate_chains:
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	925 all_revs.update(chain)
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	926 other = None
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	927 for r in revlog.revs(prev, snapfloor):
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	928 if r not in all_revs:
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	929 other = r
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	930 break
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	931 if other is not None:
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	932 # To avoid unfair competition, we won't use unrelated intermediate
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	933 # snapshot that are deeper than the ones from the parent delta
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	934 # chain.
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	935 max_depth = max(parents_snaps.keys())
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	936 chain = deltachain(other)
49743 01ccb45b7393 delta-find: rename a variable for clarity Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49742 diff changeset	937 for depth, s in enumerate(chain):
39522 c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	938 if s < snapfloor:
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	939 continue
49743 01ccb45b7393 delta-find: rename a variable for clarity Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49742 diff changeset	940 if max_depth < depth:
39522 c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	941 break
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	942 if not revlog.issnapshot(s):
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	943 break
49743 01ccb45b7393 delta-find: rename a variable for clarity Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49742 diff changeset	944 parents_snaps[depth].add(s)
39511 e72130f58f5d snapshot: consider all snapshots in the parents' chains Boris Feld <boris.feld@octobus.net> parents: 39510 diff changeset	945 # Test them as possible intermediate snapshot base
e72130f58f5d snapshot: consider all snapshots in the parents' chains Boris Feld <boris.feld@octobus.net> parents: 39510 diff changeset	946 # We test them from highest to lowest level. High level one are more
e72130f58f5d snapshot: consider all snapshots in the parents' chains Boris Feld <boris.feld@octobus.net> parents: 39510 diff changeset	947 # likely to result in small delta
39512 6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	948 floor = None
39511 e72130f58f5d snapshot: consider all snapshots in the parents' chains Boris Feld <boris.feld@octobus.net> parents: 39510 diff changeset	949 for idx, snaps in sorted(parents_snaps.items(), reverse=True):
39512 6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	950 siblings = set()
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	951 for s in snaps:
49792 efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	952 siblings.update(snapshot_cache.snapshots[s])
39512 6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	953 # Before considering making a new intermediate snapshot, we check
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	954 # if an existing snapshot, children of base we consider, would be
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	955 # suitable.
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	956 #
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	957 # It give a change to reuse a delta chain "unrelated" to the
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	958 # current revision instead of starting our own. Without such
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	959 # re-use, topological branches would keep reopening new chains.
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	960 # Creating more and more snapshot as the repository grow.
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	961
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	962 if floor is not None:
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	963 # We only do this for siblings created after the one in our
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	964 # parent's delta chain. Those created before has less chances
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	965 # to be valid base since our ancestors had to create a new
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	966 # snapshot.
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	967 siblings = [r for r in siblings if floor < r]
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	968 yield tuple(sorted(siblings))
6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	969 # then test the base from our parent's delta chain.
39511 e72130f58f5d snapshot: consider all snapshots in the parents' chains Boris Feld <boris.feld@octobus.net> parents: 39510 diff changeset	970 yield tuple(sorted(snaps))
39512 6a53842727c1 snapshot: consider unrelated snapshots at a similar level first Boris Feld <boris.feld@octobus.net> parents: 39511 diff changeset	971 floor = min(snaps)
39510 3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot Boris Feld <boris.feld@octobus.net> parents: 39509 diff changeset	972 # No suitable base found in the parent chain, search if any full
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot Boris Feld <boris.feld@octobus.net> parents: 39509 diff changeset	973 # snapshots emitted since parent's base would be a suitable base for an
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot Boris Feld <boris.feld@octobus.net> parents: 39509 diff changeset	974 # intermediate snapshot.
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot Boris Feld <boris.feld@octobus.net> parents: 39509 diff changeset	975 #
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot Boris Feld <boris.feld@octobus.net> parents: 39509 diff changeset	976 # It give a chance to reuse a delta chain unrelated to the current
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot Boris Feld <boris.feld@octobus.net> parents: 39509 diff changeset	977 # revisions instead of starting our own. Without such re-use,
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot Boris Feld <boris.feld@octobus.net> parents: 39509 diff changeset	978 # topological branches would keep reopening new full chains. Creating
3ca144f1c8dd snapshot: search for unrelated but reusable full-snapshot Boris Feld <boris.feld@octobus.net> parents: 39509 diff changeset	979 # more and more snapshot as the repository grow.
49794 40e24d82b513 delta-find: make sure we only use newer full snapshot as candidate Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49793 diff changeset	980 full = [r for r in snapshot_cache.snapshots[nullrev] if snapfloor <= r]
40e24d82b513 delta-find: make sure we only use newer full snapshot as candidate Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49793 diff changeset	981 yield tuple(sorted(full))
39509 a33f394b2bfd snapshot: try intermediate snapshot against parents' base Boris Feld <boris.feld@octobus.net> parents: 39505 diff changeset	982
39522 c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	983 if not sparse:
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	984 # other approach failed try against prev to hopefully save us a
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	985 # fulltext.
c6b8eab5db19 snapshot: also consider the snapshot chain of one unrelated revision Boris Feld <boris.feld@octobus.net> parents: 39521 diff changeset	986 yield (prev,)
39361 507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function Boris Feld <boris.feld@octobus.net> parents: 39360 diff changeset	987
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	988
49792 efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	989 class SnapshotCache:
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	990 __slots__ = ('snapshots', '_start_rev', '_end_rev')
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	991
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	992 def __init__(self):
49793 b670eb3dd6c9 delta-find: use sets instead of list in the snapshot cache Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49792 diff changeset	993 self.snapshots = collections.defaultdict(set)
49792 efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	994 self._start_rev = None
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	995 self._end_rev = None
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	996
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	997 def update(self, revlog, start_rev=0):
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	998 """find snapshots from start_rev to tip"""
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	999 nb_revs = len(revlog)
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1000 end_rev = nb_revs - 1
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1001 if start_rev > end_rev:
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1002 return # range is empty
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1003
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1004 if self._start_rev is None:
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1005 assert self._end_rev is None
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1006 self._update(revlog, start_rev, end_rev)
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1007 elif not (self._start_rev <= start_rev and end_rev <= self._end_rev):
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1008 if start_rev < self._start_rev:
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1009 self._update(revlog, start_rev, self._start_rev - 1)
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1010 if self._end_rev < end_rev:
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1011 self._update(revlog, self._end_rev + 1, end_rev)
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1012
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1013 if self._start_rev is None:
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1014 assert self._end_rev is None
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1015 self._end_rev = end_rev
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1016 self._start_rev = start_rev
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1017 else:
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1018 self._start_rev = min(self._start_rev, start_rev)
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1019 self._end_rev = max(self._end_rev, end_rev)
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1020 assert self._start_rev <= self._end_rev, (
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1021 self._start_rev,
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1022 self._end_rev,
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1023 )
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1024
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1025 def _update(self, revlog, start_rev, end_rev):
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1026 """internal method that actually do update content"""
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1027 assert self._start_rev is None or (
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1028 start_rev < self._start_rev or start_rev > self._end_rev
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1029 ), (self._start_rev, self._end_rev, start_rev, end_rev)
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1030 assert self._start_rev is None or (
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1031 end_rev < self._start_rev or end_rev > self._end_rev
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1032 ), (self._start_rev, self._end_rev, start_rev, end_rev)
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1033 cache = self.snapshots
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1034 if util.safehasattr(revlog.index, b'findsnapshots'):
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1035 revlog.index.findsnapshots(cache, start_rev, end_rev)
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1036 else:
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1037 deltaparent = revlog.deltaparent
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1038 issnapshot = revlog.issnapshot
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1039 for rev in revlog.revs(start_rev, end_rev):
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1040 if issnapshot(rev):
49793 b670eb3dd6c9 delta-find: use sets instead of list in the snapshot cache Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49792 diff changeset	1041 cache[deltaparent(rev)].add(rev)
49792 efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1042
efbbc2f9121e delta-find: use a smarter object for snapshot caching Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49791 diff changeset	1043
49037 642e31cb55f0 py3: use class X: instead of class X(object): Gregory Szorc <gregory.szorc@gmail.com> parents: 48966 diff changeset	1044 class deltacomputer:
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1045 def __init__(
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1046 self,
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1047 revlog,
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1048 write_debug=None,
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1049 debug_search=False,
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1050 debug_info=None,
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1051 ):
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1052 self.revlog = revlog
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1053 self._write_debug = write_debug
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1054 self._debug_search = debug_search
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1055 self._debug_info = debug_info
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1056
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1057 def buildtext(self, revinfo, fh):
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1058 """Builds a fulltext version of a revision
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1059
47405 34cc102c73f5 revlog: move `revisioninfo` in `revlogutils` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47264 diff changeset	1060 revinfo: revisioninfo instance that contains all needed info
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1061 fh: file handle to either the .i or the .d revlog file,
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1062 depending on whether it is inlined or not
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1063 """
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1064 btext = revinfo.btext
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1065 if btext[0] is not None:
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1066 return btext[0]
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1067
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1068 revlog = self.revlog
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1069 cachedelta = revinfo.cachedelta
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1070 baserev = cachedelta[0]
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1071 delta = cachedelta[1]
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1072
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1073 fulltext = btext[0] = _textfromdelta(
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1074 fh,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1075 revlog,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1076 baserev,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1077 delta,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1078 revinfo.p1,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1079 revinfo.p2,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1080 revinfo.flags,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1081 revinfo.node,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1082 )
39358 fd0150a3c2fe revlogdeltas: extra fulltext building in its own function Boris Feld <boris.feld@octobus.net> parents: 39357 diff changeset	1083 return fulltext
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1084
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1085 def _builddeltadiff(self, base, revinfo, fh):
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1086 revlog = self.revlog
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1087 t = self.buildtext(revinfo, fh)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1088 if revlog.iscensored(base):
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1089 # deltas based on a censored revision must replace the
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1090 # full content in one patch, so delta works everywhere
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1091 header = mdiff.replacediffheader(revlog.rawsize(base), len(t))
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1092 delta = header + t
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1093 else:
42796 7a89b044eea4 rawdata: update callers in delta utils Pierre-Yves David <pierre-yves.david@octobus.net> parents: 42484 diff changeset	1094 ptext = revlog.rawdata(base, _df=fh)
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1095 delta = mdiff.textdiff(ptext, t)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1096
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1097 return delta
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1098
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1099 def _builddeltainfo(self, revinfo, base, fh):
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1100 # can we use the cached delta?
42481 6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1101 revlog = self.revlog
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1102 debug_search = self._write_debug is not None and self._debug_search
42481 6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1103 chainbase = revlog.chainbase(base)
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1104 if revlog._generaldelta:
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1105 deltabase = base
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1106 else:
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1107 deltabase = chainbase
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1108 snapshotdepth = None
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1109 if revlog._sparserevlog and deltabase == nullrev:
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1110 snapshotdepth = 0
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1111 elif revlog._sparserevlog and revlog.issnapshot(deltabase):
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1112 # A delta chain should always be one full snapshot,
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1113 # zero or more semi-snapshots, and zero or more deltas
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1114 p1, p2 = revlog.rev(revinfo.p1), revlog.rev(revinfo.p2)
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1115 if deltabase not in (p1, p2) and revlog.issnapshot(deltabase):
6e9ba867a946 delta: move some delta chain related computation earlier in deltainfo Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42480 diff changeset	1116 snapshotdepth = len(revlog._deltachain(deltabase)[0])
39611 a911932d5003 revlog: reuse cached delta for identical base revision (issue5975) Boris Feld <boris.feld@octobus.net> parents: 39610 diff changeset	1117 delta = None
a911932d5003 revlog: reuse cached delta for identical base revision (issue5975) Boris Feld <boris.feld@octobus.net> parents: 39610 diff changeset	1118 if revinfo.cachedelta:
49789 0fca63953810 find-delta: minor preparatory change Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49788 diff changeset	1119 cachebase = revinfo.cachedelta[0]
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1120 # check if the diff still apply
39611 a911932d5003 revlog: reuse cached delta for identical base revision (issue5975) Boris Feld <boris.feld@octobus.net> parents: 39610 diff changeset	1121 currentbase = cachebase
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1122 while (
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1123 currentbase != nullrev
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1124 and currentbase != base
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1125 and self.revlog.length(currentbase) == 0
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1126 ):
39611 a911932d5003 revlog: reuse cached delta for identical base revision (issue5975) Boris Feld <boris.feld@octobus.net> parents: 39610 diff changeset	1127 currentbase = self.revlog.deltaparent(currentbase)
41824 688fc33e105d storage: introduce a `revlog.reuse-external-delta` config Pierre-Yves David <pierre-yves.david@octobus.net> parents: 41312 diff changeset	1128 if self.revlog._lazydelta and currentbase == base:
39611 a911932d5003 revlog: reuse cached delta for identical base revision (issue5975) Boris Feld <boris.feld@octobus.net> parents: 39610 diff changeset	1129 delta = revinfo.cachedelta[1]
a911932d5003 revlog: reuse cached delta for identical base revision (issue5975) Boris Feld <boris.feld@octobus.net> parents: 39610 diff changeset	1130 if delta is None:
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1131 delta = self._builddeltadiff(base, revinfo, fh)
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1132 if debug_search:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1133 msg = b"DBG-DELTAS-SEARCH: uncompressed-delta-size=%d\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1134 msg %= len(delta)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1135 self._write_debug(msg)
42483 c1c1872d25d1 deltas: skip if projected compressed size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42482 diff changeset	1136 # snapshotdept need to be neither None nor 0 level snapshot
c1c1872d25d1 deltas: skip if projected compressed size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42482 diff changeset	1137 if revlog.upperboundcomp is not None and snapshotdepth:
c1c1872d25d1 deltas: skip if projected compressed size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42482 diff changeset	1138 lowestrealisticdeltalen = len(delta) // revlog.upperboundcomp
c1c1872d25d1 deltas: skip if projected compressed size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42482 diff changeset	1139 snapshotlimit = revinfo.textlen >> snapshotdepth
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1140 if debug_search:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1141 msg = b"DBG-DELTAS-SEARCH: projected-lower-size=%d\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1142 msg %= lowestrealisticdeltalen
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1143 self._write_debug(msg)
42483 c1c1872d25d1 deltas: skip if projected compressed size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42482 diff changeset	1144 if snapshotlimit < lowestrealisticdeltalen:
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1145 if debug_search:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1146 msg = b"DBG-DELTAS-SEARCH: DISCARDED (snapshot limit)\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1147 self._write_debug(msg)
42483 c1c1872d25d1 deltas: skip if projected compressed size does not match text size constraint Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42482 diff changeset	1148 return None
42484 9b5fbe5ead89 deltas: skip if projected compressed size is bigger than previous snapshot Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42483 diff changeset	1149 if revlog.length(base) < lowestrealisticdeltalen:
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1150 if debug_search:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1151 msg = b"DBG-DELTAS-SEARCH: DISCARDED (prev size)\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1152 self._write_debug(msg)
42484 9b5fbe5ead89 deltas: skip if projected compressed size is bigger than previous snapshot Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42483 diff changeset	1153 return None
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1154 header, data = revlog.compress(delta)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1155 deltalen = len(header) + len(data)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1156 offset = revlog.end(len(revlog) - 1)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1157 dist = deltalen + offset - revlog.start(chainbase)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1158 chainlen, compresseddeltalen = revlog._chaininfo(base)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1159 chainlen += 1
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1160 compresseddeltalen += deltalen
39187 e0da43e2f71f revlog: compute snapshot depth on delta info Boris Feld <boris.feld@octobus.net> parents: 39185 diff changeset	1161
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1162 return _deltainfo(
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1163 dist,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1164 deltalen,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1165 (header, data),
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1166 deltabase,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1167 chainbase,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1168 chainlen,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1169 compresseddeltalen,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1170 snapshotdepth,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1171 )
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1172
47462 93f4e183b3f5 deltas: at a `target_rev` parameter to finddeltainfo Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47458 diff changeset	1173 def _fullsnapshotinfo(self, fh, revinfo, curr):
39360 5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39359 diff changeset	1174 rawtext = self.buildtext(revinfo, fh)
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39359 diff changeset	1175 data = self.revlog.compress(rawtext)
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39359 diff changeset	1176 compresseddeltalen = deltalen = dist = len(data[1]) + len(data[0])
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39359 diff changeset	1177 deltabase = chainbase = curr
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39359 diff changeset	1178 snapshotdepth = 0
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39359 diff changeset	1179 chainlen = 1
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39359 diff changeset	1180
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1181 return _deltainfo(
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1182 dist,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1183 deltalen,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1184 data,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1185 deltabase,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1186 chainbase,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1187 chainlen,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1188 compresseddeltalen,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1189 snapshotdepth,
2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1190 )
39360 5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39359 diff changeset	1191
47462 93f4e183b3f5 deltas: at a `target_rev` parameter to finddeltainfo Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47458 diff changeset	1192 def finddeltainfo(self, revinfo, fh, excluded_bases=None, target_rev=None):
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1193 """Find an acceptable delta against a candidate revision
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1194
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1195 revinfo: information about the revision (instance of _revisioninfo)
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1196 fh: file handle to either the .i or the .d revlog file,
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1197 depending on whether it is inlined or not
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1198
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1199 Returns the first acceptable candidate revision, as ordered by
39361 507f5b1dd7c8 revlogdeltas: extract _getcandidaterevs in a function Boris Feld <boris.feld@octobus.net> parents: 39360 diff changeset	1200 _candidategroups
39360 5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39359 diff changeset	1201
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39359 diff changeset	1202 If no suitable deltabase is found, we return delta info for a full
5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39359 diff changeset	1203 snapshot.
47407 1efe3cdef53a revlog: add a ways to blacklist some revision when searching for a delta Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47405 diff changeset	1204
1efe3cdef53a revlog: add a ways to blacklist some revision when searching for a delta Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47405 diff changeset	1205 `excluded_bases` is an optional set of revision that cannot be used as
1efe3cdef53a revlog: add a ways to blacklist some revision when searching for a delta Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47405 diff changeset	1206 a delta base. Use this to recompute delta suitable in censor or strip
1efe3cdef53a revlog: add a ways to blacklist some revision when searching for a delta Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47405 diff changeset	1207 context.
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1208 """
47462 93f4e183b3f5 deltas: at a `target_rev` parameter to finddeltainfo Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47458 diff changeset	1209 if target_rev is None:
47463 f8330a3fc39f censor: implement censoring for revlogv2 Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47462 diff changeset	1210 target_rev = len(self.revlog)
47462 93f4e183b3f5 deltas: at a `target_rev` parameter to finddeltainfo Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47458 diff changeset	1211
39122 dbb3e9e44fce revlog: do not search for delta for empty content Boris Feld <boris.feld@octobus.net> parents: 39121 diff changeset	1212 if not revinfo.textlen:
47462 93f4e183b3f5 deltas: at a `target_rev` parameter to finddeltainfo Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47458 diff changeset	1213 return self._fullsnapshotinfo(fh, revinfo, target_rev)
39122 dbb3e9e44fce revlog: do not search for delta for empty content Boris Feld <boris.feld@octobus.net> parents: 39121 diff changeset	1214
47407 1efe3cdef53a revlog: add a ways to blacklist some revision when searching for a delta Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47405 diff changeset	1215 if excluded_bases is None:
1efe3cdef53a revlog: add a ways to blacklist some revision when searching for a delta Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47405 diff changeset	1216 excluded_bases = set()
1efe3cdef53a revlog: add a ways to blacklist some revision when searching for a delta Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47405 diff changeset	1217
39359 6f4b8f607a31 revlogdeltas: move special cases around raw revisions in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39358 diff changeset	1218 # no delta for flag processor revision (see "candelta" for why)
6f4b8f607a31 revlogdeltas: move special cases around raw revisions in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39358 diff changeset	1219 # not calling candelta since only one revision needs test, also to
6f4b8f607a31 revlogdeltas: move special cases around raw revisions in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39358 diff changeset	1220 # avoid overhead fetching flags again.
6f4b8f607a31 revlogdeltas: move special cases around raw revisions in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39358 diff changeset	1221 if revinfo.flags & REVIDX_RAWTEXT_CHANGING_FLAGS:
47462 93f4e183b3f5 deltas: at a `target_rev` parameter to finddeltainfo Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47458 diff changeset	1222 return self._fullsnapshotinfo(fh, revinfo, target_rev)
39359 6f4b8f607a31 revlogdeltas: move special cases around raw revisions in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39358 diff changeset	1223
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1224 gather_debug = (
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1225 self._write_debug is not None or self._debug_info is not None
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1226 )
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1227 debug_search = self._write_debug is not None and self._debug_search
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1228
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1229 if gather_debug:
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1230 start = util.timer()
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1231
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1232 # count the number of different delta we tried (for debug purpose)
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1233 dbg_try_count = 0
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1234 # count the number of "search round" we did. (for debug purpose)
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1235 dbg_try_rounds = 0
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1236 dbg_type = b'unknown'
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1237
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1238 cachedelta = revinfo.cachedelta
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1239 p1 = revinfo.p1
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1240 p2 = revinfo.p2
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1241 revlog = self.revlog
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1242
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1243 deltainfo = None
39362 1441eb38849f revlogdeltas: pass revision number to _candidatesgroups Boris Feld <boris.feld@octobus.net> parents: 39361 diff changeset	1244 p1r, p2r = revlog.rev(p1), revlog.rev(p2)
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1245
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1246 if gather_debug:
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1247 if p1r != nullrev:
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1248 p1_chain_len = revlog._chaininfo(p1r)[0]
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1249 else:
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1250 p1_chain_len = -1
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1251 if p2r != nullrev:
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1252 p2_chain_len = revlog._chaininfo(p2r)[0]
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1253 else:
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1254 p2_chain_len = -1
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1255 if debug_search:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1256 msg = b"DBG-DELTAS-SEARCH: SEARCH rev=%d\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1257 msg %= target_rev
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1258 self._write_debug(msg)
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1259
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1260 groups = _candidategroups(
49740 2afee2176775 delta-find: expand a function definition and call before extendin it Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49739 diff changeset	1261 self.revlog,
2afee2176775 delta-find: expand a function definition and call before extendin it Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49739 diff changeset	1262 revinfo.textlen,
2afee2176775 delta-find: expand a function definition and call before extendin it Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49739 diff changeset	1263 p1r,
2afee2176775 delta-find: expand a function definition and call before extendin it Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49739 diff changeset	1264 p2r,
2afee2176775 delta-find: expand a function definition and call before extendin it Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49739 diff changeset	1265 cachedelta,
49741 e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49740 diff changeset	1266 excluded_bases,
e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49740 diff changeset	1267 target_rev,
43076 2372284d9457 formatting: blacken the codebase Augie Fackler <augie@google.com> parents: 42994 diff changeset	1268 )
39514 5b308a4e6d03 snapshot: use None as a stop value when looking for a good delta Boris Feld <boris.feld@octobus.net> parents: 39513 diff changeset	1269 candidaterevs = next(groups)
5b308a4e6d03 snapshot: use None as a stop value when looking for a good delta Boris Feld <boris.feld@octobus.net> parents: 39513 diff changeset	1270 while candidaterevs is not None:
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1271 dbg_try_rounds += 1
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1272 if debug_search:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1273 prev = None
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1274 if deltainfo is not None:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1275 prev = deltainfo.base
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1276
49737 78ba41878f2e delta-find: add debug information about reuse of cached data Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49249 diff changeset	1277 if (
78ba41878f2e delta-find: add debug information about reuse of cached data Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49249 diff changeset	1278 cachedelta is not None
78ba41878f2e delta-find: add debug information about reuse of cached data Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49249 diff changeset	1279 and len(candidaterevs) == 1
78ba41878f2e delta-find: add debug information about reuse of cached data Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49249 diff changeset	1280 and cachedelta[0] in candidaterevs
78ba41878f2e delta-find: add debug information about reuse of cached data Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49249 diff changeset	1281 ):
78ba41878f2e delta-find: add debug information about reuse of cached data Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49249 diff changeset	1282 round_type = b"cached-delta"
78ba41878f2e delta-find: add debug information about reuse of cached data Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49249 diff changeset	1283 elif p1 in candidaterevs or p2 in candidaterevs:
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1284 round_type = b"parents"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1285 elif prev is not None and all(c < prev for c in candidaterevs):
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1286 round_type = b"refine-down"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1287 elif prev is not None and all(c > prev for c in candidaterevs):
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1288 round_type = b"refine-up"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1289 else:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1290 round_type = b"search-down"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1291 msg = b"DBG-DELTAS-SEARCH: ROUND #%d - %d candidates - %s\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1292 msg %= (dbg_try_rounds, len(candidaterevs), round_type)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1293 self._write_debug(msg)
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1294 nominateddeltas = []
39515 04b75f3a3f2a snapshot: add refining logic at the findeltainfo level Boris Feld <boris.feld@octobus.net> parents: 39514 diff changeset	1295 if deltainfo is not None:
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1296 if debug_search:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1297 msg = (
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1298 b"DBG-DELTAS-SEARCH: CONTENDER: rev=%d - length=%d\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1299 )
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1300 msg %= (deltainfo.base, deltainfo.deltalen)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1301 self._write_debug(msg)
39515 04b75f3a3f2a snapshot: add refining logic at the findeltainfo level Boris Feld <boris.feld@octobus.net> parents: 39514 diff changeset	1302 # if we already found a good delta,
04b75f3a3f2a snapshot: add refining logic at the findeltainfo level Boris Feld <boris.feld@octobus.net> parents: 39514 diff changeset	1303 # challenge it against refined candidates
04b75f3a3f2a snapshot: add refining logic at the findeltainfo level Boris Feld <boris.feld@octobus.net> parents: 39514 diff changeset	1304 nominateddeltas.append(deltainfo)
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1305 for candidaterev in candidaterevs:
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1306 if debug_search:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1307 msg = b"DBG-DELTAS-SEARCH: CANDIDATE: rev=%d\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1308 msg %= candidaterev
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1309 self._write_debug(msg)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1310 candidate_type = None
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1311 if candidaterev == p1:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1312 candidate_type = b"p1"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1313 elif candidaterev == p2:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1314 candidate_type = b"p2"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1315 elif self.revlog.issnapshot(candidaterev):
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1316 candidate_type = b"snapshot-%d"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1317 candidate_type %= self.revlog.snapshotdepth(
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1318 candidaterev
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1319 )
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1320
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1321 if candidate_type is not None:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1322 msg = b"DBG-DELTAS-SEARCH: type=%s\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1323 msg %= candidate_type
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1324 self._write_debug(msg)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1325 msg = b"DBG-DELTAS-SEARCH: size=%d\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1326 msg %= self.revlog.length(candidaterev)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1327 self._write_debug(msg)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1328 msg = b"DBG-DELTAS-SEARCH: base=%d\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1329 msg %= self.revlog.deltaparent(candidaterev)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1330 self._write_debug(msg)
49741 e706bb41fdb3 delta-find: move pre-filtering with other pre-filtering logic Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49740 diff changeset	1331
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1332 dbg_try_count += 1
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1333
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1334 if debug_search:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1335 delta_start = util.timer()
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1336 candidatedelta = self._builddeltainfo(revinfo, candidaterev, fh)
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1337 if debug_search:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1338 delta_end = util.timer()
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1339 msg = b"DBG-DELTAS-SEARCH: delta-search-time=%f\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1340 msg %= delta_end - delta_start
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1341 self._write_debug(msg)
42482 465f2d0df9ae deltas: accept and skip None return for delta info Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42481 diff changeset	1342 if candidatedelta is not None:
49788 5af4a0a73e4c find-delta: rename _isgooddeltainfo Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49772 diff changeset	1343 if is_good_delta_info(self.revlog, candidatedelta, revinfo):
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1344 if debug_search:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1345 msg = b"DBG-DELTAS-SEARCH: DELTA: length=%d (GOOD)\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1346 msg %= candidatedelta.deltalen
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1347 self._write_debug(msg)
42482 465f2d0df9ae deltas: accept and skip None return for delta info Valentin Gatien-Baron <vgatien-baron@janestreet.com> parents: 42481 diff changeset	1348 nominateddeltas.append(candidatedelta)
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1349 elif debug_search:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1350 msg = b"DBG-DELTAS-SEARCH: DELTA: length=%d (BAD)\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1351 msg %= candidatedelta.deltalen
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1352 self._write_debug(msg)
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1353 elif debug_search:
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1354 msg = b"DBG-DELTAS-SEARCH: NO-DELTA\n"
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1355 self._write_debug(msg)
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1356 if nominateddeltas:
f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1357 deltainfo = min(nominateddeltas, key=lambda x: x.deltalen)
39515 04b75f3a3f2a snapshot: add refining logic at the findeltainfo level Boris Feld <boris.feld@octobus.net> parents: 39514 diff changeset	1358 if deltainfo is not None:
04b75f3a3f2a snapshot: add refining logic at the findeltainfo level Boris Feld <boris.feld@octobus.net> parents: 39514 diff changeset	1359 candidaterevs = groups.send(deltainfo.base)
04b75f3a3f2a snapshot: add refining logic at the findeltainfo level Boris Feld <boris.feld@octobus.net> parents: 39514 diff changeset	1360 else:
04b75f3a3f2a snapshot: add refining logic at the findeltainfo level Boris Feld <boris.feld@octobus.net> parents: 39514 diff changeset	1361 candidaterevs = next(groups)
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1362
39360 5d343a24bff5 revlogdeltas: always return a delta info object in finddeltainfo Boris Feld <boris.feld@octobus.net> parents: 39359 diff changeset	1363 if deltainfo is None:
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1364 dbg_type = b"full"
47462 93f4e183b3f5 deltas: at a `target_rev` parameter to finddeltainfo Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47458 diff changeset	1365 deltainfo = self._fullsnapshotinfo(fh, revinfo, target_rev)
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1366 elif deltainfo.snapshotdepth: # pytype: disable=attribute-error
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1367 dbg_type = b"snapshot"
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1368 else:
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1369 dbg_type = b"delta"
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1370
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1371 if gather_debug:
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1372 end = util.timer()
49737 78ba41878f2e delta-find: add debug information about reuse of cached data Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49249 diff changeset	1373 used_cached = (
78ba41878f2e delta-find: add debug information about reuse of cached data Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49249 diff changeset	1374 cachedelta is not None
78ba41878f2e delta-find: add debug information about reuse of cached data Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49249 diff changeset	1375 and dbg_try_rounds == 1
78ba41878f2e delta-find: add debug information about reuse of cached data Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49249 diff changeset	1376 and dbg_try_count == 1
78ba41878f2e delta-find: add debug information about reuse of cached data Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49249 diff changeset	1377 and deltainfo.base == cachedelta[0]
78ba41878f2e delta-find: add debug information about reuse of cached data Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49249 diff changeset	1378 )
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1379 dbg = {
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1380 'duration': end - start,
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1381 'revision': target_rev,
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1382 'delta-base': deltainfo.base, # pytype: disable=attribute-error
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1383 'search_round_count': dbg_try_rounds,
49737 78ba41878f2e delta-find: add debug information about reuse of cached data Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49249 diff changeset	1384 'using-cached-base': used_cached,
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1385 'delta_try_count': dbg_try_count,
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1386 'type': dbg_type,
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1387 'p1-chain-len': p1_chain_len,
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1388 'p2-chain-len': p2_chain_len,
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1389 }
49249 b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1390 if (
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1391 deltainfo.snapshotdepth # pytype: disable=attribute-error
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1392 is not None
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1393 ):
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1394 dbg[
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1395 'snapshot-depth'
b909dd35d9ab deltas: add a debug-delta-find command to analyse delta search Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49247 diff changeset	1396 ] = deltainfo.snapshotdepth # pytype: disable=attribute-error
49247 e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1397 else:
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1398 dbg['snapshot-depth'] = 0
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1399 target_revlog = b"UNKNOWN"
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1400 target_type = self.revlog.target[0]
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1401 target_key = self.revlog.target[1]
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1402 if target_type == KIND_CHANGELOG:
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1403 target_revlog = b'CHANGELOG:'
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1404 elif target_type == KIND_MANIFESTLOG:
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1405 target_revlog = b'MANIFESTLOG:'
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1406 if target_key:
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1407 target_revlog += b'%s:' % target_key
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1408 elif target_type == KIND_FILELOG:
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1409 target_revlog = b'FILELOG:'
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1410 if target_key:
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1411 target_revlog += b'%s:' % target_key
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1412 dbg['target-revlog'] = target_revlog
e6b7c6fbeb48 deltas: add code to display information about the result of `finddeltainfo` Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49037 diff changeset	1413
49739 35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1414 if self._debug_info is not None:
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1415 self._debug_info.append(dbg)
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1416
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1417 if self._write_debug is not None:
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1418 msg = (
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1419 b"DBG-DELTAS:"
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1420 b" %-12s"
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1421 b" rev=%d:"
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1422 b" delta-base=%d"
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1423 b" is-cached=%d"
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1424 b" - search-rounds=%d"
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1425 b" try-count=%d"
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1426 b" - delta-type=%-6s"
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1427 b" snap-depth=%d"
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1428 b" - p1-chain-length=%d"
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1429 b" p2-chain-length=%d"
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1430 b" - duration=%f"
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1431 b"\n"
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1432 )
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1433 msg %= (
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1434 dbg["target-revlog"],
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1435 dbg["revision"],
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1436 dbg["delta-base"],
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1437 dbg["using-cached-base"],
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1438 dbg["search_round_count"],
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1439 dbg["delta_try_count"],
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1440 dbg["type"],
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1441 dbg["snapshot-depth"],
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1442 dbg["p1-chain-len"],
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1443 dbg["p2-chain-len"],
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1444 dbg["duration"],
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1445 )
35d4c2124073 debug: add an option to display statistic about a unbundling operation Pierre-Yves David <pierre-yves.david@octobus.net> parents: 49737 diff changeset	1446 self._write_debug(msg)
35738 f90f6fd130c1 revlog: group delta computation methods under _deltacomputer object Paul Morelle <paul.morelle@octobus.net> parents: 35737 diff changeset	1447 return deltainfo
47458 c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1448
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1449
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1450 def delta_compression(default_compression_header, deltainfo):
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1451 """return (COMPRESSION_MODE, deltainfo)
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1452
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1453 used by revlog v2+ format to dispatch between PLAIN and DEFAULT
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1454 compression.
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1455 """
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1456 h, d = deltainfo.data
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1457 compression_mode = COMP_MODE_INLINE
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1458 if not h and not d:
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1459 # not data to store at all... declare them uncompressed
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1460 compression_mode = COMP_MODE_PLAIN
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1461 elif not h:
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1462 t = d[0:1]
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1463 if t == b'\0':
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1464 compression_mode = COMP_MODE_PLAIN
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1465 elif t == default_compression_header:
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1466 compression_mode = COMP_MODE_DEFAULT
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1467 elif h == b'u':
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1468 # we have a more efficient way to declare uncompressed
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1469 h = b''
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1470 compression_mode = COMP_MODE_PLAIN
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1471 deltainfo = drop_u_compression(deltainfo)
c6844912c327 revlog: factor the logic to determine the delta compression out Pierre-Yves David <pierre-yves.david@octobus.net> parents: 47407 diff changeset	1472 return compression_mode, deltainfo

Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/revlogutils/deltas.py @ 49794:40e24d82b513