mercurial-scm/hg: mercurial/transaction.py annotate

annotate mercurial/transaction.py @ 23281:f60ed8cf4afc

transaction: pass the transaction to 'finalize' callback The callback will likely need to perform some operation related to the transaction (eg: registering file update). So we better pass the current transaction as the callback argument. Otherwise callback that needs it has to rely on horrible weak reference trick. This allow already allow us to slay a wild weak reference usage.

author	Pierre-Yves David <pierre-yves.david@fb.com>
date	Sat, 08 Nov 2014 16:31:38 +0000
parents	b01c491af0cf
children	6c1351352b6c

rev	line source
17424 e7cfe3587ea4 fix trivial spelling errors Mads Kiilerich <mads@kiilerich.com> parents: 16689 diff changeset	1 # transaction.py - simple journaling scheme for mercurial
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	2 #
9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	3 # This transaction scheme is intended to gracefully handle program
9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	4 # errors and interruptions. More serious failures like system crashes
9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	5 # can be recovered with an fsck-like tool. As the whole repository is
9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	6 # effectively log-structured, this should amount to simply truncating
9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	7 # anything that isn't referenced in the changelog.
9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	8 #
2859 345bac2bc4ec update copyrights. Vadim Gelfer <vadim.gelfer@gmail.com> parents: 2470 diff changeset	9 # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	10 #
8225 46293a0c7e9f updated license to be explicit about GPL version 2 Martin Geisler <mg@lazybytes.net> parents: 8071 diff changeset	11 # 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: 10228 diff changeset	12 # GNU General Public License version 2 or any later version.
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	13
3891 6b4127c7d52a Simplify i18n imports Matt Mackall <mpm@selenic.com> parents: 3877 diff changeset	14 from i18n import _
20886 203908968644 transaction: drop extra import caught by pyflakes Matt Mackall <mpm@selenic.com> parents: 20882 diff changeset	15 import errno
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	16 import error, util
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	17
23064 5dc888b79e70 transactions: add version number to journal.backupfiles Durham Goode <durham@fb.com> parents: 23063 diff changeset	18 version = 1
5dc888b79e70 transactions: add version number to journal.backupfiles Durham Goode <durham@fb.com> parents: 23063 diff changeset	19
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	20 def active(func):
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	21 def _active(self, args, *kwds):
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	22 if self.count == 0:
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	23 raise error.Abort(_(
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	24 'cannot use transaction when it is already committed/aborted'))
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	25 return func(self, args, *kwds)
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	26 return _active
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	27
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	28 def _playback(journal, report, opener, entries, backupentries, unlink=True):
22204 f8dc6599da5d cleanup: name unused variables using convention of leading _ Mads Kiilerich <madski@unity3d.com> parents: 22199 diff changeset	29 for f, o, _ignore in entries:
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	30 if o or not unlink:
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	31 try:
13400 14f3795a5ed7 explicitly close files Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 11685 diff changeset	32 fp = opener(f, 'a')
14f3795a5ed7 explicitly close files Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 11685 diff changeset	33 fp.truncate(o)
14f3795a5ed7 explicitly close files Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 11685 diff changeset	34 fp.close()
9686 ddf2adf88b89 transaction: more specific exceptions, os.unlink can raise OSError Benoit Boissinot <benoit.boissinot@ens-lyon.org> parents: 9220 diff changeset	35 except IOError:
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	36 report(_("failed to truncate %s\n") % f)
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	37 raise
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	38 else:
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	39 try:
20084 a3378a1b0a05 transaction: unlink target file via vfs FUJIWARA Katsunori <foozy@lares.dti.ne.jp> parents: 17424 diff changeset	40 opener.unlink(f)
9686 ddf2adf88b89 transaction: more specific exceptions, os.unlink can raise OSError Benoit Boissinot <benoit.boissinot@ens-lyon.org> parents: 9220 diff changeset	41 except (IOError, OSError), inst:
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	42 if inst.errno != errno.ENOENT:
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	43 raise
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	44
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	45 backupfiles = []
23247 def27d46a9a8 transaction: drop the third item in `tr.backupentries` Pierre-Yves David <pierre-yves.david@fb.com> parents: 23220 diff changeset	46 for f, b in backupentries:
23278 aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	47 if b:
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	48 filepath = opener.join(f)
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	49 backuppath = opener.join(b)
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	50 try:
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	51 util.copyfile(backuppath, filepath)
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	52 backupfiles.append(b)
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	53 except IOError:
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	54 report(_("failed to recover %s\n") % f)
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	55 raise
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	56 else:
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	57 try:
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	58 opener.unlink(f)
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	59 except (IOError, OSError), inst:
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	60 if inst.errno != errno.ENOENT:
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	61 raise
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	62
20087 cf3b8285af00 transaction: take journal file path relative to vfs to use file API via vfs FUJIWARA Katsunori <foozy@lares.dti.ne.jp> parents: 20084 diff changeset	63 opener.unlink(journal)
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	64 backuppath = "%s.backupfiles" % journal
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	65 if opener.exists(backuppath):
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	66 opener.unlink(backuppath)
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	67 for f in backupfiles:
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	68 opener.unlink(f)
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	69
1559 59b3639df0a9 Convert all classes to new-style classes by deriving them from object. Eric Hopper <hopper@omnifarious.org> parents: 1541 diff changeset	70 class transaction(object):
20881 3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	71 def __init__(self, report, opener, journal, after=None, createmode=None,
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	72 onclose=None, onabort=None):
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	73 """Begin a new transaction
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	74
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	75 Begins a new transaction that allows rolling back writes in the event of
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	76 an exception.
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	77
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	78 * `after`: called after the transaction has been committed
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	79 * `createmode`: the mode of the journal file that will be created
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	80 * `onclose`: called as the transaction is closing, but before it is
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	81 closed
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	82 * `onabort`: called as the transaction is aborting, but before any files
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	83 have been truncated
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	84 """
1806 a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	85 self.count = 1
11230 5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	86 self.usages = 1
582 df8a5a0098d4 Remove all remaining print statements mpm@selenic.com parents: 573 diff changeset	87 self.report = report
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	88 self.opener = opener
95 589f507bb259 Beginnings of transaction undo support mpm@selenic.com parents: 43 diff changeset	89 self.after = after
20881 3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	90 self.onclose = onclose
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	91 self.onabort = onabort
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	92 self.entries = []
23249 84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	93 self.map = {}
23279 e245775f8fd3 transaction: gather backupjournal logic together in the __init__ Pierre-Yves David <pierre-yves.david@fb.com> parents: 23278 diff changeset	94 self.journal = journal
e245775f8fd3 transaction: gather backupjournal logic together in the __init__ Pierre-Yves David <pierre-yves.david@fb.com> parents: 23278 diff changeset	95 self._queue = []
e245775f8fd3 transaction: gather backupjournal logic together in the __init__ Pierre-Yves David <pierre-yves.david@fb.com> parents: 23278 diff changeset	96 # a dict of arguments to be passed to hooks
e245775f8fd3 transaction: gather backupjournal logic together in the __init__ Pierre-Yves David <pierre-yves.david@fb.com> parents: 23278 diff changeset	97 self.hookargs = {}
e245775f8fd3 transaction: gather backupjournal logic together in the __init__ Pierre-Yves David <pierre-yves.david@fb.com> parents: 23278 diff changeset	98 self.file = opener.open(self.journal, "w")
e245775f8fd3 transaction: gather backupjournal logic together in the __init__ Pierre-Yves David <pierre-yves.david@fb.com> parents: 23278 diff changeset	99
23248 e754b62373ad transaction: document the contents of `tr.backupentries` Pierre-Yves David <pierre-yves.david@fb.com> parents: 23247 diff changeset	100 # a list of ('path', 'backuppath') entries.
23278 aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	101 # if 'backuppath' is empty, no file existed at backup time
23249 84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	102 self._backupentries = []
84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	103 self._backupmap = {}
84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	104 self._backupjournal = "%s.backupfiles" % journal
84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	105 self._backupsfile = opener.open(self._backupjournal, 'w')
84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	106 self._backupsfile.write('%d\n' % version)
23279 e245775f8fd3 transaction: gather backupjournal logic together in the __init__ Pierre-Yves David <pierre-yves.david@fb.com> parents: 23278 diff changeset	107
6065 53ed9b40cfc4 make the journal/undo files from transactions inherit the mode from .hg/store Alexis S. L. Carvalho <alexis@cecm.usp.br> parents: 5865 diff changeset	108 if createmode is not None:
20087 cf3b8285af00 transaction: take journal file path relative to vfs to use file API via vfs FUJIWARA Katsunori <foozy@lares.dti.ne.jp> parents: 20084 diff changeset	109 opener.chmod(self.journal, createmode & 0666)
23249 84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	110 opener.chmod(self._backupjournal, createmode & 0666)
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	111
22078 feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	112 # hold file generations to be performed on commit
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	113 self._filegenerators = {}
23202 ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	114 # hold callbalk to write pending data for hooks
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	115 self._pendingcallback = {}
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	116 # True is any pending data have been written ever
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	117 self._anypending = False
23204 10beda5bd2b7 transaction: allow registering a finalization callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23202 diff changeset	118 # holds callback to call when writing the transaction
10beda5bd2b7 transaction: allow registering a finalization callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23202 diff changeset	119 self._finalizecallback = {}
23220 3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	120 # hold callbalk for post transaction close
3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	121 self._postclosecallback = {}
22078 feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	122
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	123 def __del__(self):
558 0ceea19182a9 transaction: __del__ should do nothing if the journal already exists mpm@selenic.com parents: 515 diff changeset	124 if self.journal:
9693 c40a1ee20aa5 transaction: always remove empty journal on abort Sune Foldager <cryo@cyanite.org> parents: 9686 diff changeset	125 self._abort()
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	126
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	127 @active
8363 c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	128 def startgroup(self):
23250 8919dc7f2dbb transaction: document startgroup and endgroup Pierre-Yves David <pierre-yves.david@fb.com> parents: 23249 diff changeset	129 """delay registration of file entry
8919dc7f2dbb transaction: document startgroup and endgroup Pierre-Yves David <pierre-yves.david@fb.com> parents: 23249 diff changeset	130
8919dc7f2dbb transaction: document startgroup and endgroup Pierre-Yves David <pierre-yves.david@fb.com> parents: 23249 diff changeset	131 This is used by strip to delay vision of strip offset. The transaction
8919dc7f2dbb transaction: document startgroup and endgroup Pierre-Yves David <pierre-yves.david@fb.com> parents: 23249 diff changeset	132 sees either none or all of the strip actions to be done."""
23251 85c634ff395a transaction: drop backupentries logic from startgroup and endgroup Pierre-Yves David <pierre-yves.david@fb.com> parents: 23250 diff changeset	133 self._queue.append([])
8363 c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	134
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	135 @active
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	136 def endgroup(self):
23250 8919dc7f2dbb transaction: document startgroup and endgroup Pierre-Yves David <pierre-yves.david@fb.com> parents: 23249 diff changeset	137 """apply delayed registration of file entry.
8919dc7f2dbb transaction: document startgroup and endgroup Pierre-Yves David <pierre-yves.david@fb.com> parents: 23249 diff changeset	138
8919dc7f2dbb transaction: document startgroup and endgroup Pierre-Yves David <pierre-yves.david@fb.com> parents: 23249 diff changeset	139 This is used by strip to delay vision of strip offset. The transaction
8919dc7f2dbb transaction: document startgroup and endgroup Pierre-Yves David <pierre-yves.david@fb.com> parents: 23249 diff changeset	140 sees either none or all of the strip actions to be done."""
8363 c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	141 q = self._queue.pop()
23253 8d84b7a2dd91 transaction: factorise append-only file registration Pierre-Yves David <pierre-yves.david@fb.com> parents: 23252 diff changeset	142 for f, o, data in q:
8d84b7a2dd91 transaction: factorise append-only file registration Pierre-Yves David <pierre-yves.david@fb.com> parents: 23252 diff changeset	143 self._addentry(f, o, data)
8363 c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	144
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	145 @active
2084 d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	146 def add(self, file, offset, data=None):
23252 70809438c644 transaction: document `tr.add` Pierre-Yves David <pierre-yves.david@fb.com> parents: 23251 diff changeset	147 """record the state of an append-only file before update"""
23249 84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	148 if file in self.map or file in self._backupmap:
10282 08a0f04b56bd many, many trivial check-code fixups Matt Mackall <mpm@selenic.com> parents: 10263 diff changeset	149 return
8363 c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	150 if self._queue:
23251 85c634ff395a transaction: drop backupentries logic from startgroup and endgroup Pierre-Yves David <pierre-yves.david@fb.com> parents: 23250 diff changeset	151 self._queue[-1].append((file, offset, data))
8363 c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	152 return
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	153
23253 8d84b7a2dd91 transaction: factorise append-only file registration Pierre-Yves David <pierre-yves.david@fb.com> parents: 23252 diff changeset	154 self._addentry(file, offset, data)
8d84b7a2dd91 transaction: factorise append-only file registration Pierre-Yves David <pierre-yves.david@fb.com> parents: 23252 diff changeset	155
8d84b7a2dd91 transaction: factorise append-only file registration Pierre-Yves David <pierre-yves.david@fb.com> parents: 23252 diff changeset	156 def _addentry(self, file, offset, data):
8d84b7a2dd91 transaction: factorise append-only file registration Pierre-Yves David <pierre-yves.david@fb.com> parents: 23252 diff changeset	157 """add a append-only entry to memory and on-disk state"""
8d84b7a2dd91 transaction: factorise append-only file registration Pierre-Yves David <pierre-yves.david@fb.com> parents: 23252 diff changeset	158 if file in self.map or file in self._backupmap:
8d84b7a2dd91 transaction: factorise append-only file registration Pierre-Yves David <pierre-yves.david@fb.com> parents: 23252 diff changeset	159 return
2084 d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	160 self.entries.append((file, offset, data))
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	161 self.map[file] = len(self.entries) - 1
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	162 # add enough data to the journal to do the truncate
9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	163 self.file.write("%s\0%d\n" % (file, offset))
9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	164 self.file.flush()
9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	165
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	166 @active
22663 4c6198737ad8 transaction: allow generating file outside of store Pierre-Yves David <pierre-yves.david@fb.com> parents: 22662 diff changeset	167 def addbackup(self, file, hardlink=True, vfs=None):
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	168 """Adds a backup of the file to the transaction
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	169
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	170 Calling addbackup() creates a hardlink backup of the specified file
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	171 that is used to recover the file in the event of the transaction
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	172 aborting.
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	173
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	174 * `file`: the file path, relative to .hg/store
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	175 * `hardlink`: use a hardlink to quickly create the backup
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	176 """
23251 85c634ff395a transaction: drop backupentries logic from startgroup and endgroup Pierre-Yves David <pierre-yves.david@fb.com> parents: 23250 diff changeset	177 if self._queue:
85c634ff395a transaction: drop backupentries logic from startgroup and endgroup Pierre-Yves David <pierre-yves.david@fb.com> parents: 23250 diff changeset	178 msg = 'cannot use transaction.addbackup inside "group"'
85c634ff395a transaction: drop backupentries logic from startgroup and endgroup Pierre-Yves David <pierre-yves.david@fb.com> parents: 23250 diff changeset	179 raise RuntimeError(msg)
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	180
23249 84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	181 if file in self.map or file in self._backupmap:
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	182 return
22077 2990ce46fc2d transaction: backup file in a dedicated "namespace" Pierre-Yves David <pierre-yves.david@fb.com> parents: 22076 diff changeset	183 backupfile = "%s.backup.%s" % (self.journal, file)
22663 4c6198737ad8 transaction: allow generating file outside of store Pierre-Yves David <pierre-yves.david@fb.com> parents: 22662 diff changeset	184 if vfs is None:
4c6198737ad8 transaction: allow generating file outside of store Pierre-Yves David <pierre-yves.david@fb.com> parents: 22662 diff changeset	185 vfs = self.opener
4c6198737ad8 transaction: allow generating file outside of store Pierre-Yves David <pierre-yves.david@fb.com> parents: 22662 diff changeset	186 if vfs.exists(file):
4c6198737ad8 transaction: allow generating file outside of store Pierre-Yves David <pierre-yves.david@fb.com> parents: 22662 diff changeset	187 filepath = vfs.join(file)
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	188 backuppath = self.opener.join(backupfile)
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	189 util.copyfiles(filepath, backuppath, hardlink=hardlink)
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	190 else:
23278 aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	191 backupfile = ''
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	192
23249 84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	193 self._backupentries.append((file, backupfile))
84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	194 self._backupmap[file] = len(self._backupentries) - 1
84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	195 self._backupsfile.write("%s\0%s\n" % (file, backupfile))
84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	196 self._backupsfile.flush()
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	197
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	198 @active
22663 4c6198737ad8 transaction: allow generating file outside of store Pierre-Yves David <pierre-yves.david@fb.com> parents: 22662 diff changeset	199 def addfilegenerator(self, genid, filenames, genfunc, order=0, vfs=None):
22078 feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	200 """add a function to generates some files at transaction commit
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	201
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	202 The `genfunc` argument is a function capable of generating proper
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	203 content of each entry in the `filename` tuple.
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	204
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	205 At transaction close time, `genfunc` will be called with one file
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	206 object argument per entries in `filenames`.
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	207
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	208 The transaction itself is responsible for the backup, creation and
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	209 final write of such file.
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	210
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	211 The `genid` argument is used to ensure the same set of file is only
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	212 generated once. Call to `addfilegenerator` for a `genid` already
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	213 present will overwrite the old entry.
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	214
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	215 The `order` argument may be used to control the order in which multiple
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	216 generator will be executed.
feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	217 """
22663 4c6198737ad8 transaction: allow generating file outside of store Pierre-Yves David <pierre-yves.david@fb.com> parents: 22662 diff changeset	218 # For now, we are unable to do proper backup and restore of custom vfs
4c6198737ad8 transaction: allow generating file outside of store Pierre-Yves David <pierre-yves.david@fb.com> parents: 22662 diff changeset	219 # but for bookmarks that are handled outside this mechanism.
4c6198737ad8 transaction: allow generating file outside of store Pierre-Yves David <pierre-yves.david@fb.com> parents: 22662 diff changeset	220 assert vfs is None or filenames == ('bookmarks',)
4c6198737ad8 transaction: allow generating file outside of store Pierre-Yves David <pierre-yves.david@fb.com> parents: 22662 diff changeset	221 self._filegenerators[genid] = (order, filenames, genfunc, vfs)
22078 feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	222
23102 16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	223 def _generatefiles(self):
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	224 # write files registered for generation
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	225 for entry in sorted(self._filegenerators.values()):
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	226 order, filenames, genfunc, vfs = entry
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	227 if vfs is None:
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	228 vfs = self.opener
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	229 files = []
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	230 try:
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	231 for name in filenames:
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	232 # Some files are already backed up when creating the
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	233 # localrepo. Until this is properly fixed we disable the
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	234 # backup for them.
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	235 if name not in ('phaseroots', 'bookmarks'):
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	236 self.addbackup(name)
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	237 files.append(vfs(name, 'w', atomictemp=True))
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	238 genfunc(*files)
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	239 finally:
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	240 for f in files:
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	241 f.close()
16da812ad970 transaction: extract file generation into its own function Pierre-Yves David <pierre-yves.david@fb.com> parents: 23065 diff changeset	242
22078 feb4797c676e transaction: add a file generation mechanism Pierre-Yves David <pierre-yves.david@fb.com> parents: 22077 diff changeset	243 @active
2084 d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	244 def find(self, file):
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	245 if file in self.map:
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	246 return self.entries[self.map[file]]
23249 84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	247 if file in self._backupmap:
84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	248 return self._backupentries[self._backupmap[file]]
2084 d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	249 return None
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	250
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	251 @active
2084 d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	252 def replace(self, file, offset, data=None):
8363 c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	253 '''
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	254 replace can only replace already committed entries
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	255 that are not pending in the queue
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	256 '''
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	257
2084 d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	258 if file not in self.map:
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	259 raise KeyError(file)
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	260 index = self.map[file]
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	261 self.entries[index] = (file, offset, data)
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	262 self.file.write("%s\0%d\n" % (file, offset))
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	263 self.file.flush()
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	264
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	265 @active
1806 a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	266 def nest(self):
a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	267 self.count += 1
11230 5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	268 self.usages += 1
1806 a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	269 return self
a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	270
11230 5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	271 def release(self):
5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	272 if self.count > 0:
5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	273 self.usages -= 1
11685 aade8f133d11 cleanup: typos Patrick Mezard <pmezard@gmail.com> parents: 11230 diff changeset	274 # if the transaction scopes are left without being closed, fail
11230 5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	275 if self.count > 0 and self.usages == 0:
5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	276 self._abort()
5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	277
1806 a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	278 def running(self):
a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	279 return self.count > 0
a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	280
23202 ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	281 def addpending(self, category, callback):
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	282 """add a callback to be called when the transaction is pending
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	283
23280 b01c491af0cf transaction: pass the transaction to 'pending' callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23279 diff changeset	284 The transaction will be given as callback's first argument.
b01c491af0cf transaction: pass the transaction to 'pending' callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23279 diff changeset	285
23202 ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	286 Category is a unique identifier to allow overwriting an old callback
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	287 with a newer callback.
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	288 """
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	289 self._pendingcallback[category] = callback
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	290
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	291 @active
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	292 def writepending(self):
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	293 '''write pending file to temporary version
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	294
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	295 This is used to allow hooks to view a transaction before commit'''
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	296 categories = sorted(self._pendingcallback)
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	297 for cat in categories:
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	298 # remove callback since the data will have been flushed
23280 b01c491af0cf transaction: pass the transaction to 'pending' callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23279 diff changeset	299 any = self._pendingcallback.pop(cat)(self)
23202 ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	300 self._anypending = self._anypending or any
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	301 return self._anypending
ea5af863fbff transaction: add 'writepending' logic Pierre-Yves David <pierre-yves.david@fb.com> parents: 23103 diff changeset	302
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	303 @active
23204 10beda5bd2b7 transaction: allow registering a finalization callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23202 diff changeset	304 def addfinalize(self, category, callback):
10beda5bd2b7 transaction: allow registering a finalization callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23202 diff changeset	305 """add a callback to be called when the transaction is closed
10beda5bd2b7 transaction: allow registering a finalization callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23202 diff changeset	306
23281 f60ed8cf4afc transaction: pass the transaction to 'finalize' callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23280 diff changeset	307 The transaction will be given as callback's first argument.
f60ed8cf4afc transaction: pass the transaction to 'finalize' callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23280 diff changeset	308
23204 10beda5bd2b7 transaction: allow registering a finalization callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23202 diff changeset	309 Category is a unique identifier to allow overwriting old callbacks with
10beda5bd2b7 transaction: allow registering a finalization callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23202 diff changeset	310 newer callbacks.
10beda5bd2b7 transaction: allow registering a finalization callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23202 diff changeset	311 """
10beda5bd2b7 transaction: allow registering a finalization callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23202 diff changeset	312 self._finalizecallback[category] = callback
10beda5bd2b7 transaction: allow registering a finalization callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23202 diff changeset	313
10beda5bd2b7 transaction: allow registering a finalization callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23202 diff changeset	314 @active
23220 3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	315 def addpostclose(self, category, callback):
3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	316 """add a callback to be called after the transaction is closed
3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	317
3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	318 Category is a unique identifier to allow overwriting an old callback
3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	319 with a newer callback.
3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	320 """
3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	321 self._postclosecallback[category] = callback
3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	322
3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	323 @active
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	324 def close(self):
9220 8a4da1388553 transaction: document close(), abort() methods Greg Ward <greg-hg@gerg.ca> parents: 9094 diff changeset	325 '''commit the transaction'''
20881 3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	326 if self.count == 1 and self.onclose is not None:
23103 29bfa964d6d8 transaction: only generate file when we actually close the transaction Pierre-Yves David <pierre-yves.david@fb.com> parents: 23102 diff changeset	327 self._generatefiles()
23204 10beda5bd2b7 transaction: allow registering a finalization callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23202 diff changeset	328 categories = sorted(self._finalizecallback)
10beda5bd2b7 transaction: allow registering a finalization callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23202 diff changeset	329 for cat in categories:
23281 f60ed8cf4afc transaction: pass the transaction to 'finalize' callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23280 diff changeset	330 self._finalizecallback[cat](self)
20881 3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	331 self.onclose()
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	332
1806 a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	333 self.count -= 1
a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	334 if self.count != 0:
a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	335 return
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	336 self.file.close()
23249 84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	337 self._backupsfile.close()
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	338 self.entries = []
95 589f507bb259 Beginnings of transaction undo support mpm@selenic.com parents: 43 diff changeset	339 if self.after:
785 46a8dd3145cc Fix undo after aborted commit bug mpm@selenic.com parents: 582 diff changeset	340 self.after()
20087 cf3b8285af00 transaction: take journal file path relative to vfs to use file API via vfs FUJIWARA Katsunori <foozy@lares.dti.ne.jp> parents: 20084 diff changeset	341 if self.opener.isfile(self.journal):
cf3b8285af00 transaction: take journal file path relative to vfs to use file API via vfs FUJIWARA Katsunori <foozy@lares.dti.ne.jp> parents: 20084 diff changeset	342 self.opener.unlink(self.journal)
23249 84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	343 if self.opener.isfile(self._backupjournal):
84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	344 self.opener.unlink(self._backupjournal)
84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	345 for _f, b in self._backupentries:
23278 aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	346 if b:
aa19432764d6 transaction: handle missing file in backupentries (instead of using entries) Pierre-Yves David <pierre-yves.david@fb.com> parents: 23253 diff changeset	347 self.opener.unlink(b)
23249 84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	348 self._backupentries = []
573 fbfbd4e506c3 transaction: nullify journal after close() mpm@selenic.com parents: 558 diff changeset	349 self.journal = None
23220 3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	350 # run post close action
3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	351 categories = sorted(self._postclosecallback)
3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	352 for cat in categories:
3f543f6be500 transaction: allow registering a post-close callback Pierre-Yves David <pierre-yves.david@fb.com> parents: 23204 diff changeset	353 self._postclosecallback[cat]()
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	354
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	355 @active
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	356 def abort(self):
9220 8a4da1388553 transaction: document close(), abort() methods Greg Ward <greg-hg@gerg.ca> parents: 9094 diff changeset	357 '''abort the transaction (generally called on error, or when the
8a4da1388553 transaction: document close(), abort() methods Greg Ward <greg-hg@gerg.ca> parents: 9094 diff changeset	358 transaction is not explicitly committed before going out of
8a4da1388553 transaction: document close(), abort() methods Greg Ward <greg-hg@gerg.ca> parents: 9094 diff changeset	359 scope)'''
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	360 self._abort()
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	361
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	362 def _abort(self):
8290 560af1bbfd6e transaction: reset transaction on abort Henrik Stuart <hg@hstuart.dk> parents: 8289 diff changeset	363 self.count = 0
11230 5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	364 self.usages = 0
8290 560af1bbfd6e transaction: reset transaction on abort Henrik Stuart <hg@hstuart.dk> parents: 8289 diff changeset	365 self.file.close()
23249 84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	366 self._backupsfile.close()
8290 560af1bbfd6e transaction: reset transaction on abort Henrik Stuart <hg@hstuart.dk> parents: 8289 diff changeset	367
20881 3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	368 if self.onabort is not None:
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	369 self.onabort()
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	370
10228 056c366fea8c transaction: initialize self.journal to None after deletion Benoit Boissinot <benoit.boissinot@ens-lyon.org> parents: 9693 diff changeset	371 try:
23249 84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	372 if not self.entries and not self._backupentries:
10228 056c366fea8c transaction: initialize self.journal to None after deletion Benoit Boissinot <benoit.boissinot@ens-lyon.org> parents: 9693 diff changeset	373 if self.journal:
20087 cf3b8285af00 transaction: take journal file path relative to vfs to use file API via vfs FUJIWARA Katsunori <foozy@lares.dti.ne.jp> parents: 20084 diff changeset	374 self.opener.unlink(self.journal)
23249 84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	375 if self._backupjournal:
84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	376 self.opener.unlink(self._backupjournal)
10228 056c366fea8c transaction: initialize self.journal to None after deletion Benoit Boissinot <benoit.boissinot@ens-lyon.org> parents: 9693 diff changeset	377 return
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	378
10228 056c366fea8c transaction: initialize self.journal to None after deletion Benoit Boissinot <benoit.boissinot@ens-lyon.org> parents: 9693 diff changeset	379 self.report(_("transaction abort!\n"))
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	380
108 8d55c2d72c7c Warn if we fail to truncate something mpm@selenic.com parents: 95 diff changeset	381 try:
10282 08a0f04b56bd many, many trivial check-code fixups Matt Mackall <mpm@selenic.com> parents: 10263 diff changeset	382 _playback(self.journal, self.report, self.opener,
23249 84720eab4fbd transaction: mark backup-related attributes private Pierre-Yves David <pierre-yves.david@fb.com> parents: 23248 diff changeset	383 self.entries, self._backupentries, False)
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	384 self.report(_("rollback completed\n"))
16689 f366d4c2ff34 cleanup: replace naked excepts with except Exception: ... Brodie Rao <brodie@sf.io> parents: 13408 diff changeset	385 except Exception:
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	386 self.report(_("rollback failed - please run hg recover\n"))
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	387 finally:
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	388 self.journal = None
8290 560af1bbfd6e transaction: reset transaction on abort Henrik Stuart <hg@hstuart.dk> parents: 8289 diff changeset	389
560af1bbfd6e transaction: reset transaction on abort Henrik Stuart <hg@hstuart.dk> parents: 8289 diff changeset	390
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	391 def rollback(opener, file, report):
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	392 """Rolls back the transaction contained in the given file
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	393
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	394 Reads the entries in the specified file, and the corresponding
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	395 '*.backupfiles' file, to recover from an incomplete transaction.
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	396
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	397 * `file`: a file containing a list of entries, specifying where
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	398 to truncate each file. The file should contain a list of
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	399 file\0offset pairs, delimited by newlines. The corresponding
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	400 '*.backupfiles' file should contain a list of file\0backupfile
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	401 pairs, delimited by \0.
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	402 """
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	403 entries = []
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	404 backupentries = []
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	405
20087 cf3b8285af00 transaction: take journal file path relative to vfs to use file API via vfs FUJIWARA Katsunori <foozy@lares.dti.ne.jp> parents: 20084 diff changeset	406 fp = opener.open(file)
13400 14f3795a5ed7 explicitly close files Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 11685 diff changeset	407 lines = fp.readlines()
14f3795a5ed7 explicitly close files Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 11685 diff changeset	408 fp.close()
14f3795a5ed7 explicitly close files Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 11685 diff changeset	409 for l in lines:
20524 28b8ff84db3f journal: report parsing errors on recover/rollback (issue4172) Matt Mackall <mpm@selenic.com> parents: 20087 diff changeset	410 try:
28b8ff84db3f journal: report parsing errors on recover/rollback (issue4172) Matt Mackall <mpm@selenic.com> parents: 20087 diff changeset	411 f, o = l.split('\0')
28b8ff84db3f journal: report parsing errors on recover/rollback (issue4172) Matt Mackall <mpm@selenic.com> parents: 20087 diff changeset	412 entries.append((f, int(o), None))
28b8ff84db3f journal: report parsing errors on recover/rollback (issue4172) Matt Mackall <mpm@selenic.com> parents: 20087 diff changeset	413 except ValueError:
28b8ff84db3f journal: report parsing errors on recover/rollback (issue4172) Matt Mackall <mpm@selenic.com> parents: 20087 diff changeset	414 report(_("couldn't read journal entry %r!\n") % l)
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	415
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	416 backupjournal = "%s.backupfiles" % file
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	417 if opener.exists(backupjournal):
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	418 fp = opener.open(backupjournal)
23065 963f311e3a81 transactions: change backupfiles format to use newlines Durham Goode <durham@fb.com> parents: 23064 diff changeset	419 lines = fp.readlines()
963f311e3a81 transactions: change backupfiles format to use newlines Durham Goode <durham@fb.com> parents: 23064 diff changeset	420 if lines:
963f311e3a81 transactions: change backupfiles format to use newlines Durham Goode <durham@fb.com> parents: 23064 diff changeset	421 ver = lines[0][:-1]
23064 5dc888b79e70 transactions: add version number to journal.backupfiles Durham Goode <durham@fb.com> parents: 23063 diff changeset	422 if ver == str(version):
23065 963f311e3a81 transactions: change backupfiles format to use newlines Durham Goode <durham@fb.com> parents: 23064 diff changeset	423 for line in lines[1:]:
963f311e3a81 transactions: change backupfiles format to use newlines Durham Goode <durham@fb.com> parents: 23064 diff changeset	424 if line:
963f311e3a81 transactions: change backupfiles format to use newlines Durham Goode <durham@fb.com> parents: 23064 diff changeset	425 # Shave off the trailing newline
963f311e3a81 transactions: change backupfiles format to use newlines Durham Goode <durham@fb.com> parents: 23064 diff changeset	426 line = line[:-1]
963f311e3a81 transactions: change backupfiles format to use newlines Durham Goode <durham@fb.com> parents: 23064 diff changeset	427 f, b = line.split('\0')
23247 def27d46a9a8 transaction: drop the third item in `tr.backupentries` Pierre-Yves David <pierre-yves.david@fb.com> parents: 23220 diff changeset	428 backupentries.append((f, b))
23064 5dc888b79e70 transactions: add version number to journal.backupfiles Durham Goode <durham@fb.com> parents: 23063 diff changeset	429 else:
5dc888b79e70 transactions: add version number to journal.backupfiles Durham Goode <durham@fb.com> parents: 23063 diff changeset	430 report(_("journal was created by a newer version of "
5dc888b79e70 transactions: add version number to journal.backupfiles Durham Goode <durham@fb.com> parents: 23063 diff changeset	431 "Mercurial"))
20882 5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	432
5dffd06f1e50 transaction: add support for non-append files Durham Goode <durham@fb.com> parents: 20881 diff changeset	433 _playback(file, report, opener, entries, backupentries)

Mercurial > public > mercurial-scm > hg

annotate mercurial/transaction.py @ 23281:f60ed8cf4afc