Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/branchmap.py @ 25266:38117278f295 stable

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revbranchcache: return uncached branchinfo for nullrev (issue4683) This fixes the crash caused by "branch(null)" revset. No cache should be necessary for nullrev because changelog.branchinfo(nullrev) does not involve IO operation. Note that the problem of "branch(wdir())" isn't addressed by this patch. "wdir()" will raise TypeError in many places because of None. This is the reason why "wdir()" is still experimental.
author Yuya Nishihara <yuya@tcha.org>
date Sat, 23 May 2015 11:14:00 +0900
parents 75688a6f0bca
children 328739ea70c3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 # branchmap.py - logic to computes, maintain and stores branchmap for local repo
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2 #
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3 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from node import bin, hex, nullid, nullrev
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9 import encoding
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10 import scmutil
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11 import util
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12 import time
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13 from array import array
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14 from struct import calcsize, pack, unpack
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15
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16 def _filename(repo):
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17 """name of a branchcache file for a given repo or repoview"""
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18 filename = "cache/branch2"
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19 if repo.filtername:
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20 filename = '%s-%s' % (filename, repo.filtername)
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21 return filename
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22
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23 def read(repo):
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24 try:
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25 f = repo.vfs(_filename(repo))
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26 lines = f.read().split('\n')
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27 f.close()
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28 except (IOError, OSError):
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29 return None
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30
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31 try:
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32 cachekey = lines.pop(0).split(" ", 2)
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33 last, lrev = cachekey[:2]
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34 last, lrev = bin(last), int(lrev)
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35 filteredhash = None
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36 if len(cachekey) > 2:
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37 filteredhash = bin(cachekey[2])
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38 partial = branchcache(tipnode=last, tiprev=lrev,
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39 filteredhash=filteredhash)
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40 if not partial.validfor(repo):
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41 # invalidate the cache
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42 raise ValueError('tip differs')
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43 for l in lines:
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44 if not l:
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45 continue
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46 node, state, label = l.split(" ", 2)
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47 if state not in 'oc':
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48 raise ValueError('invalid branch state')
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49 label = encoding.tolocal(label.strip())
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50 if not node in repo:
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51 raise ValueError('node %s does not exist' % node)
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52 node = bin(node)
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53 partial.setdefault(label, []).append(node)
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54 if state == 'c':
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55 partial._closednodes.add(node)
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56 except KeyboardInterrupt:
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57 raise
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58 except Exception, inst:
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59 if repo.ui.debugflag:
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60 msg = 'invalid branchheads cache'
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61 if repo.filtername is not None:
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62 msg += ' (%s)' % repo.filtername
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63 msg += ': %s\n'
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64 repo.ui.debug(msg % inst)
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65 partial = None
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66 return partial
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67
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68 ### Nearest subset relation
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69 # Nearest subset of filter X is a filter Y so that:
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70 # * Y is included in X,
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71 # * X - Y is as small as possible.
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72 # This create and ordering used for branchmap purpose.
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73 # the ordering may be partial
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74 subsettable = {None: 'visible',
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75 'visible': 'served',
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76 'served': 'immutable',
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77 'immutable': 'base'}
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78
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79 def updatecache(repo):
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80 cl = repo.changelog
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81 filtername = repo.filtername
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82 partial = repo._branchcaches.get(filtername)
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83
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84 revs = []
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85 if partial is None or not partial.validfor(repo):
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86 partial = read(repo)
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87 if partial is None:
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88 subsetname = subsettable.get(filtername)
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89 if subsetname is None:
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90 partial = branchcache()
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91 else:
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92 subset = repo.filtered(subsetname)
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93 partial = subset.branchmap().copy()
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94 extrarevs = subset.changelog.filteredrevs - cl.filteredrevs
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95 revs.extend(r for r in extrarevs if r <= partial.tiprev)
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96 revs.extend(cl.revs(start=partial.tiprev + 1))
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97 if revs:
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98 partial.update(repo, revs)
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99 partial.write(repo)
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100
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101 assert partial.validfor(repo), filtername
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102 repo._branchcaches[repo.filtername] = partial
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103
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104 class branchcache(dict):
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105 """A dict like object that hold branches heads cache.
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106
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107 This cache is used to avoid costly computations to determine all the
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108 branch heads of a repo.
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109
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110 The cache is serialized on disk in the following format:
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111
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112 <tip hex node> <tip rev number> [optional filtered repo hex hash]
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113 <branch head hex node> <open/closed state> <branch name>
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114 <branch head hex node> <open/closed state> <branch name>
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115 ...
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116
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117 The first line is used to check if the cache is still valid. If the
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118 branch cache is for a filtered repo view, an optional third hash is
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119 included that hashes the hashes of all filtered revisions.
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120
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121 The open/closed state is represented by a single letter 'o' or 'c'.
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Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
122 This field can be used to avoid changelog reads when determining if a
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
123 branch head closes a branch or not.
20181
b9515fb9e72a branchmap: add documentation on the branchcache on-disk format
Brodie Rao <brodie@sf.io>
parents: 20032
diff changeset
124 """
18124
79db6d40bced branchmap: store branchcache in a dedicated object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18121
diff changeset
125
18168
c351759ab0a0 branchmap: takes filtered revision in account for cache calculation
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18167
diff changeset
126 def __init__(self, entries=(), tipnode=nullid, tiprev=nullrev,
20185
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
127 filteredhash=None, closednodes=None):
18125
ad194a8ab5c1 branchmap: add the tipnode (cache key) on the branchcache object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18124
diff changeset
128 super(branchcache, self).__init__(entries)
ad194a8ab5c1 branchmap: add the tipnode (cache key) on the branchcache object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18124
diff changeset
129 self.tipnode = tipnode
18126
090ada0acddb branchmap: add the tiprev (cache key) on the branchmap object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18125
diff changeset
130 self.tiprev = tiprev
18168
c351759ab0a0 branchmap: takes filtered revision in account for cache calculation
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18167
diff changeset
131 self.filteredhash = filteredhash
20185
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
132 # closednodes is a set of nodes that close their branch. If the branch
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
133 # cache has been updated, it may contain nodes that are no longer
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
134 # heads.
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
135 if closednodes is None:
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
136 self._closednodes = set()
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
137 else:
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
138 self._closednodes = closednodes
18168
c351759ab0a0 branchmap: takes filtered revision in account for cache calculation
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18167
diff changeset
139
18132
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
140 def validfor(self, repo):
18644
3e92772d5383 spelling: fix some minor issues found by spell checker
Mads Kiilerich <mads@kiilerich.com>
parents: 18451
diff changeset
141 """Is the cache content valid regarding a repo
18132
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
142
18644
3e92772d5383 spelling: fix some minor issues found by spell checker
Mads Kiilerich <mads@kiilerich.com>
parents: 18451
diff changeset
143 - False when cached tipnode is unknown or if we detect a strip.
18132
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
144 - True when cache is up to date or a subset of current repo."""
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
145 try:
18168
c351759ab0a0 branchmap: takes filtered revision in account for cache calculation
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18167
diff changeset
146 return ((self.tipnode == repo.changelog.node(self.tiprev))
24723
467a33142425 repoview: move function for computing filtered hash
Gregory Szorc <gregory.szorc@gmail.com>
parents: 24378
diff changeset
147 and (self.filteredhash == \
467a33142425 repoview: move function for computing filtered hash
Gregory Szorc <gregory.szorc@gmail.com>
parents: 24378
diff changeset
148 scmutil.filteredhash(repo, self.tiprev)))
18132
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
149 except IndexError:
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
150 return False
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
151
20186
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
152 def _branchtip(self, heads):
20245
4edd179fefb8 help: branch names primarily denote the tipmost unclosed branch head
Mads Kiilerich <madski@unity3d.com>
parents: 20190
diff changeset
153 '''Return tuple with last open head in heads and false,
4edd179fefb8 help: branch names primarily denote the tipmost unclosed branch head
Mads Kiilerich <madski@unity3d.com>
parents: 20190
diff changeset
154 otherwise return last closed head and true.'''
20186
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
155 tip = heads[-1]
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
156 closed = True
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
157 for h in reversed(heads):
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
158 if h not in self._closednodes:
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
159 tip = h
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
160 closed = False
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
161 break
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
162 return tip, closed
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
163
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
164 def branchtip(self, branch):
20245
4edd179fefb8 help: branch names primarily denote the tipmost unclosed branch head
Mads Kiilerich <madski@unity3d.com>
parents: 20190
diff changeset
165 '''Return the tipmost open head on branch head, otherwise return the
4edd179fefb8 help: branch names primarily denote the tipmost unclosed branch head
Mads Kiilerich <madski@unity3d.com>
parents: 20190
diff changeset
166 tipmost closed head on branch.
4edd179fefb8 help: branch names primarily denote the tipmost unclosed branch head
Mads Kiilerich <madski@unity3d.com>
parents: 20190
diff changeset
167 Raise KeyError for unknown branch.'''
20186
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
168 return self._branchtip(self[branch])[0]
f5b461a4bc55 branchmap: introduce branchtip() method
Brodie Rao <brodie@sf.io>
parents: 20185
diff changeset
169
20188
3a3727829607 branchmap: introduce branchheads() method
Brodie Rao <brodie@sf.io>
parents: 20186
diff changeset
170 def branchheads(self, branch, closed=False):
3a3727829607 branchmap: introduce branchheads() method
Brodie Rao <brodie@sf.io>
parents: 20186
diff changeset
171 heads = self[branch]
3a3727829607 branchmap: introduce branchheads() method
Brodie Rao <brodie@sf.io>
parents: 20186
diff changeset
172 if not closed:
3a3727829607 branchmap: introduce branchheads() method
Brodie Rao <brodie@sf.io>
parents: 20186
diff changeset
173 heads = [h for h in heads if h not in self._closednodes]
3a3727829607 branchmap: introduce branchheads() method
Brodie Rao <brodie@sf.io>
parents: 20186
diff changeset
174 return heads
3a3727829607 branchmap: introduce branchheads() method
Brodie Rao <brodie@sf.io>
parents: 20186
diff changeset
175
20190
d5d25e541637 branchmap: introduce iterbranches() method
Brodie Rao <brodie@sf.io>
parents: 20188
diff changeset
176 def iterbranches(self):
d5d25e541637 branchmap: introduce iterbranches() method
Brodie Rao <brodie@sf.io>
parents: 20188
diff changeset
177 for bn, heads in self.iteritems():
d5d25e541637 branchmap: introduce iterbranches() method
Brodie Rao <brodie@sf.io>
parents: 20188
diff changeset
178 yield (bn, heads) + self._branchtip(heads)
d5d25e541637 branchmap: introduce iterbranches() method
Brodie Rao <brodie@sf.io>
parents: 20188
diff changeset
179
18232
dd0b636b0b65 branchmap: add a copy method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18218
diff changeset
180 def copy(self):
dd0b636b0b65 branchmap: add a copy method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18218
diff changeset
181 """return an deep copy of the branchcache object"""
20185
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
182 return branchcache(self, self.tipnode, self.tiprev, self.filteredhash,
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
183 self._closednodes)
18132
db25bf1dc828 branchmap: move validity logic in the object itself
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18131
diff changeset
184
18128
f0d56efaa35a branchmap: make write a method on the branchmap object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18127
diff changeset
185 def write(self, repo):
f0d56efaa35a branchmap: make write a method on the branchmap object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18127
diff changeset
186 try:
23877
7cc77030c557 localrepo: remove all external users of localrepo.opener
Angel Ezquerra <angel.ezquerra@gmail.com>
parents: 23863
diff changeset
187 f = repo.vfs(_filename(repo), "w", atomictemp=True)
18184
8d48af68e2ae branchmap: read and write key part related to filtered revision
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18168
diff changeset
188 cachekey = [hex(self.tipnode), str(self.tiprev)]
8d48af68e2ae branchmap: read and write key part related to filtered revision
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18168
diff changeset
189 if self.filteredhash is not None:
8d48af68e2ae branchmap: read and write key part related to filtered revision
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18168
diff changeset
190 cachekey.append(hex(self.filteredhash))
8d48af68e2ae branchmap: read and write key part related to filtered revision
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18168
diff changeset
191 f.write(" ".join(cachekey) + '\n')
21031
05cfcecb3aef branchmap: log events related to branch cache
Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
192 nodecount = 0
18357
a4ab37ca887b localrepo: store branchheads sorted
Mads Kiilerich <mads@kiilerich.com>
parents: 18307
diff changeset
193 for label, nodes in sorted(self.iteritems()):
18128
f0d56efaa35a branchmap: make write a method on the branchmap object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18127
diff changeset
194 for node in nodes:
21031
05cfcecb3aef branchmap: log events related to branch cache
Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
195 nodecount += 1
20185
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
196 if node in self._closednodes:
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
197 state = 'c'
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
198 else:
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
199 state = 'o'
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
200 f.write("%s %s %s\n" % (hex(node), state,
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
201 encoding.fromlocal(label)))
18128
f0d56efaa35a branchmap: make write a method on the branchmap object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18127
diff changeset
202 f.close()
21031
05cfcecb3aef branchmap: log events related to branch cache
Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
203 repo.ui.log('branchcache',
05cfcecb3aef branchmap: log events related to branch cache
Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
204 'wrote %s branch cache with %d labels and %d nodes\n',
05cfcecb3aef branchmap: log events related to branch cache
Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
205 repo.filtername, len(self), nodecount)
21788
c20843aee8a4 branch: add debug message for branch cache write failure
Matt Mackall <mpm@selenic.com>
parents: 21031
diff changeset
206 except (IOError, OSError, util.Abort), inst:
c20843aee8a4 branch: add debug message for branch cache write failure
Matt Mackall <mpm@selenic.com>
parents: 21031
diff changeset
207 repo.ui.debug("couldn't write branch cache: %s\n" % inst)
18214
cd4c75200206 branchmap: ignore Abort error while writing cache
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18212
diff changeset
208 # Abort may be raise by read only opener
18128
f0d56efaa35a branchmap: make write a method on the branchmap object
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18127
diff changeset
209 pass
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
210
18305
2502a15e033d branchmap: pass revision insteads of changectx to the update function
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18234
diff changeset
211 def update(self, repo, revgen):
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
212 """Given a branchhead cache, self, that may have extra nodes or be
20263
ea4996754d91 branchmap: simplify update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20262
diff changeset
213 missing heads, and a generator of nodes that are strictly a superset of
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
214 heads missing, this function updates self to be correct.
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
215 """
21031
05cfcecb3aef branchmap: log events related to branch cache
Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
216 starttime = time.time()
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
217 cl = repo.changelog
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
218 # collect new branch entries
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
219 newbranches = {}
24373
59cc09240afb revbranchcache: move out of branchmap onto localrepo
Durham Goode <durham@fb.com>
parents: 24163
diff changeset
220 getbranchinfo = repo.revbranchcache().branchinfo
18307
0eed2546118a branchmap: Save changectx creation during update
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents: 18305
diff changeset
221 for r in revgen:
24374
77fd1fb538cd revbranchcache: store repo on the object
Durham Goode <durham@fb.com>
parents: 24373
diff changeset
222 branch, closesbranch = getbranchinfo(r)
20262
cf450ee3f8f7 branchmap: stop useless rev -> node -> rev round trip
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20261
diff changeset
223 newbranches.setdefault(branch, []).append(r)
20185
7d4219512823 branchmap: cache open/closed branch head information
Brodie Rao <brodie@sf.io>
parents: 20181
diff changeset
224 if closesbranch:
20262
cf450ee3f8f7 branchmap: stop useless rev -> node -> rev round trip
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20261
diff changeset
225 self._closednodes.add(cl.node(r))
22357
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
226
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
227 # fetch current topological heads to speed up filtering
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
228 topoheads = set(cl.headrevs())
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
229
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
230 # if older branchheads are reachable from new ones, they aren't
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
231 # really branchheads. Note checking parents is insufficient:
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
232 # 1 (branch a) -> 2 (branch b) -> 3 (branch a)
20262
cf450ee3f8f7 branchmap: stop useless rev -> node -> rev round trip
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20261
diff changeset
233 for branch, newheadrevs in newbranches.iteritems():
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
234 bheads = self.setdefault(branch, [])
20264
d9e1c167943b branchmap: use set for update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20263
diff changeset
235 bheadset = set(cl.rev(node) for node in bheads)
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
236
20263
ea4996754d91 branchmap: simplify update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20262
diff changeset
237 # This have been tested True on all internal usage of this function.
ea4996754d91 branchmap: simplify update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20262
diff changeset
238 # run it again in case of doubt
ea4996754d91 branchmap: simplify update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20262
diff changeset
239 # assert not (set(bheadrevs) & set(newheadrevs))
ea4996754d91 branchmap: simplify update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20262
diff changeset
240 newheadrevs.sort()
20264
d9e1c167943b branchmap: use set for update code
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 20263
diff changeset
241 bheadset.update(newheadrevs)
18131
f0eeb9b3444a branchmap: make update a method
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
242
22356
3c8fb24334e9 branchmap: issue a single call to `ancestors` for all heads
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22059
diff changeset
243 # This prunes out two kinds of heads - heads that are superseded by
3c8fb24334e9 branchmap: issue a single call to `ancestors` for all heads
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22059
diff changeset
244 # a head in newheadrevs, and newheadrevs that are not heads because
3c8fb24334e9 branchmap: issue a single call to `ancestors` for all heads
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22059
diff changeset
245 # an existing head is their descendant.
22357
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
246 uncertain = bheadset - topoheads
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
247 if uncertain:
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
248 floorrev = min(uncertain)
9c3c3dc14a65 branchmap: pre-filter topological heads before ancestors based filtering
Pierre-Yves David <pierre-yves.david@fb.com>
parents: 22356
diff changeset
249 ancestors = set(cl.ancestors(newheadrevs, floorrev))
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diff changeset
250 bheadset -= ancestors
20264
d9e1c167943b branchmap: use set for update code
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diff changeset
251 bheadrevs = sorted(bheadset)
18131
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diff changeset
252 self[branch] = [cl.node(rev) for rev in bheadrevs]
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diff changeset
253 tiprev = bheadrevs[-1]
18131
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diff changeset
254 if tiprev > self.tiprev:
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diff changeset
255 self.tipnode = cl.node(tiprev)
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diff changeset
256 self.tiprev = tiprev
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diff changeset
257
19838
23386881abeb branchmap: remove the droppednodes logic
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 19837
diff changeset
258 if not self.validfor(repo):
18131
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diff changeset
259 # cache key are not valid anymore
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diff changeset
260 self.tipnode = nullid
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diff changeset
261 self.tiprev = nullrev
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Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 18130
diff changeset
262 for heads in self.values():
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parents: 18130
diff changeset
263 tiprev = max(cl.rev(node) for node in heads)
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parents: 18130
diff changeset
264 if tiprev > self.tiprev:
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parents: 18130
diff changeset
265 self.tipnode = cl.node(tiprev)
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diff changeset
266 self.tiprev = tiprev
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 24378
diff changeset
267 self.filteredhash = scmutil.filteredhash(repo, self.tiprev)
21031
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 20264
diff changeset
268
05cfcecb3aef branchmap: log events related to branch cache
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parents: 20264
diff changeset
269 duration = time.time() - starttime
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parents: 20264
diff changeset
270 repo.ui.log('branchcache', 'updated %s branch cache in %.4f seconds\n',
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diff changeset
271 repo.filtername, duration)
23785
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diff changeset
272
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diff changeset
273 # Revision branch info cache
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diff changeset
274
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diff changeset
275 _rbcversion = '-v1'
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diff changeset
276 _rbcnames = 'cache/rbc-names' + _rbcversion
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diff changeset
277 _rbcrevs = 'cache/rbc-revs' + _rbcversion
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diff changeset
278 # [4 byte hash prefix][4 byte branch name number with sign bit indicating open]
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diff changeset
279 _rbcrecfmt = '>4sI'
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diff changeset
280 _rbcrecsize = calcsize(_rbcrecfmt)
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diff changeset
281 _rbcnodelen = 4
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diff changeset
282 _rbcbranchidxmask = 0x7fffffff
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diff changeset
283 _rbccloseflag = 0x80000000
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diff changeset
284
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diff changeset
285 class revbranchcache(object):
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diff changeset
286 """Persistent cache, mapping from revision number to branch name and close.
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diff changeset
287 This is a low level cache, independent of filtering.
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diff changeset
288
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diff changeset
289 Branch names are stored in rbc-names in internal encoding separated by 0.
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diff changeset
290 rbc-names is append-only, and each branch name is only stored once and will
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diff changeset
291 thus have a unique index.
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diff changeset
292
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diff changeset
293 The branch info for each revision is stored in rbc-revs as constant size
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
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parents: 22357
diff changeset
294 records. The whole file is read into memory, but it is only 'parsed' on
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
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parents: 22357
diff changeset
295 demand. The file is usually append-only but will be truncated if repo
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parents: 22357
diff changeset
296 modification is detected.
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diff changeset
297 The record for each revision contains the first 4 bytes of the
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
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parents: 22357
diff changeset
298 corresponding node hash, and the record is only used if it still matches.
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parents: 22357
diff changeset
299 Even a completely trashed rbc-revs fill thus still give the right result
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diff changeset
300 while converging towards full recovery ... assuming no incorrectly matching
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diff changeset
301 node hashes.
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diff changeset
302 The record also contains 4 bytes where 31 bits contains the index of the
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diff changeset
303 branch and the last bit indicate that it is a branch close commit.
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diff changeset
304 The usage pattern for rbc-revs is thus somewhat similar to 00changelog.i
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diff changeset
305 and will grow with it but be 1/8th of its size.
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diff changeset
306 """
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diff changeset
307
24159
5b4ed033390b revisionbranchcache: fall back to slow path if starting readonly (issue4531)
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diff changeset
308 def __init__(self, repo, readonly=True):
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
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diff changeset
309 assert repo.filtername is None
24374
77fd1fb538cd revbranchcache: store repo on the object
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diff changeset
310 self._repo = repo
23785
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diff changeset
311 self._names = [] # branch names in local encoding with static index
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diff changeset
312 self._rbcrevs = array('c') # structs of type _rbcrecfmt
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diff changeset
313 self._rbcsnameslen = 0
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diff changeset
314 try:
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diff changeset
315 bndata = repo.vfs.read(_rbcnames)
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parents: 22357
diff changeset
316 self._rbcsnameslen = len(bndata) # for verification before writing
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diff changeset
317 self._names = [encoding.tolocal(bn) for bn in bndata.split('\0')]
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parents: 22357
diff changeset
318 except (IOError, OSError), inst:
24159
5b4ed033390b revisionbranchcache: fall back to slow path if starting readonly (issue4531)
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parents: 23877
diff changeset
319 if readonly:
5b4ed033390b revisionbranchcache: fall back to slow path if starting readonly (issue4531)
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parents: 23877
diff changeset
320 # don't try to use cache - fall back to the slow path
5b4ed033390b revisionbranchcache: fall back to slow path if starting readonly (issue4531)
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parents: 23877
diff changeset
321 self.branchinfo = self._branchinfo
5b4ed033390b revisionbranchcache: fall back to slow path if starting readonly (issue4531)
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parents: 23877
diff changeset
322
23785
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diff changeset
323 if self._names:
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diff changeset
324 try:
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diff changeset
325 data = repo.vfs.read(_rbcrevs)
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diff changeset
326 self._rbcrevs.fromstring(data)
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diff changeset
327 except (IOError, OSError), inst:
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diff changeset
328 repo.ui.debug("couldn't read revision branch cache: %s\n" %
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
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parents: 22357
diff changeset
329 inst)
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diff changeset
330 # remember number of good records on disk
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diff changeset
331 self._rbcrevslen = min(len(self._rbcrevs) // _rbcrecsize,
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
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parents: 22357
diff changeset
332 len(repo.changelog))
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
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parents: 22357
diff changeset
333 if self._rbcrevslen == 0:
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diff changeset
334 self._names = []
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diff changeset
335 self._rbcnamescount = len(self._names) # number of good names on disk
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diff changeset
336 self._namesreverse = dict((b, r) for r, b in enumerate(self._names))
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diff changeset
337
24374
77fd1fb538cd revbranchcache: store repo on the object
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parents: 24373
diff changeset
338 def branchinfo(self, rev):
23785
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diff changeset
339 """Return branch name and close flag for rev, using and updating
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diff changeset
340 persistent cache."""
24374
77fd1fb538cd revbranchcache: store repo on the object
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diff changeset
341 changelog = self._repo.changelog
23785
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diff changeset
342 rbcrevidx = rev * _rbcrecsize
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diff changeset
343
25266
38117278f295 revbranchcache: return uncached branchinfo for nullrev (issue4683)
Yuya Nishihara <yuya@tcha.org>
parents: 24728
diff changeset
344 # avoid negative index, changelog.read(nullrev) is fast without cache
38117278f295 revbranchcache: return uncached branchinfo for nullrev (issue4683)
Yuya Nishihara <yuya@tcha.org>
parents: 24728
diff changeset
345 if rev == nullrev:
38117278f295 revbranchcache: return uncached branchinfo for nullrev (issue4683)
Yuya Nishihara <yuya@tcha.org>
parents: 24728
diff changeset
346 return changelog.branchinfo(rev)
38117278f295 revbranchcache: return uncached branchinfo for nullrev (issue4683)
Yuya Nishihara <yuya@tcha.org>
parents: 24728
diff changeset
347
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
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diff changeset
348 # if requested rev is missing, add and populate all missing revs
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diff changeset
349 if len(self._rbcrevs) < rbcrevidx + _rbcrecsize:
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diff changeset
350 self._rbcrevs.extend('\0' * (len(changelog) * _rbcrecsize -
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
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diff changeset
351 len(self._rbcrevs)))
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diff changeset
352
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diff changeset
353 # fast path: extract data from cache, use it if node is matching
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diff changeset
354 reponode = changelog.node(rev)[:_rbcnodelen]
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diff changeset
355 cachenode, branchidx = unpack(
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diff changeset
356 _rbcrecfmt, buffer(self._rbcrevs, rbcrevidx, _rbcrecsize))
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diff changeset
357 close = bool(branchidx & _rbccloseflag)
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diff changeset
358 if close:
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diff changeset
359 branchidx &= _rbcbranchidxmask
24376
203a078da052 revbranchcache: populate cache incrementally
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parents: 24375
diff changeset
360 if cachenode == '\0\0\0\0':
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
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diff changeset
361 pass
203a078da052 revbranchcache: populate cache incrementally
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diff changeset
362 elif cachenode == reponode:
23785
cb99bacb9b4e branchcache: introduce revbranchcache for caching of revision branch names
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diff changeset
363 return self._names[branchidx], close
24376
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
parents: 24375
diff changeset
364 else:
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
parents: 24375
diff changeset
365 # rev/node map has changed, invalidate the cache from here up
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
parents: 24375
diff changeset
366 truncate = rbcrevidx + _rbcrecsize
203a078da052 revbranchcache: populate cache incrementally
Durham Goode <durham@fb.com>
parents: 24375
diff changeset
367 del self._rbcrevs[truncate:]
203a078da052 revbranchcache: populate cache incrementally
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parents: 24375
diff changeset
368 self._rbcrevslen = min(self._rbcrevslen, truncate)
203a078da052 revbranchcache: populate cache incrementally
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parents: 24375
diff changeset
369
23785
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diff changeset
370 # fall back to slow path and make sure it will be written to disk
24374
77fd1fb538cd revbranchcache: store repo on the object
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parents: 24373
diff changeset
371 return self._branchinfo(rev)
23785
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diff changeset
372
24374
77fd1fb538cd revbranchcache: store repo on the object
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diff changeset
373 def _branchinfo(self, rev):
23785
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374 """Retrieve branch info from changelog and update _rbcrevs"""
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375 changelog = self._repo.changelog
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376 b, close = changelog.branchinfo(rev)
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377 if b in self._namesreverse:
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378 branchidx = self._namesreverse[b]
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379 else:
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380 branchidx = len(self._names)
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381 self._names.append(b)
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382 self._namesreverse[b] = branchidx
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383 reponode = changelog.node(rev)
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384 if close:
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385 branchidx |= _rbccloseflag
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386 self._setcachedata(rev, reponode, branchidx)
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387 return b, close
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388
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389 def _setcachedata(self, rev, node, branchidx):
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390 """Writes the node's branch data to the in-memory cache data."""
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391 rbcrevidx = rev * _rbcrecsize
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392 rec = array('c')
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393 rec.fromstring(pack(_rbcrecfmt, node, branchidx))
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394 self._rbcrevs[rbcrevidx:rbcrevidx + _rbcrecsize] = rec
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395 self._rbcrevslen = min(self._rbcrevslen, rev)
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396
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397 tr = self._repo.currenttransaction()
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398 if tr:
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399 tr.addfinalize('write-revbranchcache', self.write)
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400
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401 def write(self, tr=None):
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402 """Save branch cache if it is dirty."""
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403 repo = self._repo
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404 if self._rbcnamescount < len(self._names):
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405 try:
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406 if self._rbcnamescount != 0:
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407 f = repo.vfs.open(_rbcnames, 'ab')
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408 if f.tell() == self._rbcsnameslen:
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409 f.write('\0')
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410 else:
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411 f.close()
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412 repo.ui.debug("%s changed - rewriting it\n" % _rbcnames)
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413 self._rbcnamescount = 0
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414 self._rbcrevslen = 0
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415 if self._rbcnamescount == 0:
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416 f = repo.vfs.open(_rbcnames, 'wb')
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417 f.write('\0'.join(encoding.fromlocal(b)
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418 for b in self._names[self._rbcnamescount:]))
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419 self._rbcsnameslen = f.tell()
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420 f.close()
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421 except (IOError, OSError, util.Abort), inst:
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422 repo.ui.debug("couldn't write revision branch cache names: "
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423 "%s\n" % inst)
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424 return
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425 self._rbcnamescount = len(self._names)
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426
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427 start = self._rbcrevslen * _rbcrecsize
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428 if start != len(self._rbcrevs):
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429 revs = min(len(repo.changelog), len(self._rbcrevs) // _rbcrecsize)
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430 try:
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431 f = repo.vfs.open(_rbcrevs, 'ab')
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432 if f.tell() != start:
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433 repo.ui.debug("truncating %s to %s\n" % (_rbcrevs, start))
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434 f.seek(start)
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435 f.truncate()
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436 end = revs * _rbcrecsize
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437 f.write(self._rbcrevs[start:end])
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438 f.close()
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diff changeset
439 except (IOError, OSError, util.Abort), inst:
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440 repo.ui.debug("couldn't write revision branch cache: %s\n" %
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diff changeset
441 inst)
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diff changeset
442 return
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diff changeset
443 self._rbcrevslen = revs