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

annotate mercurial/transaction.py @ 20881:3c47677a8d04

transaction: add onclose/onabort hook for pre-close logic Adds an optional onclose parameter to transactions that gets called just before the transaction is committed. This allows things that build up data over the course of the transaction (like the fncache) to commit their data. Also adds onabort. It's not used, but will allow extensions to hook into onclose and onabort to provide transaction support.

author	Durham Goode <durham@fb.com>
date	Mon, 24 Mar 2014 15:57:47 -0700
parents	28b8ff84db3f
children	5dffd06f1e50

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 _
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	15 import errno
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	16 import error
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	17
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	18 def active(func):
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	19 def _active(self, args, *kwds):
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	20 if self.count == 0:
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	21 raise error.Abort(_(
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	22 '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	23 return func(self, args, *kwds)
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	24 return _active
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	25
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	26 def _playback(journal, report, opener, entries, unlink=True):
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	27 for f, o, ignore in entries:
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	28 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	29 try:
13400 14f3795a5ed7 explicitly close files Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 11685 diff changeset	30 fp = opener(f, 'a')
14f3795a5ed7 explicitly close files Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 11685 diff changeset	31 fp.truncate(o)
14f3795a5ed7 explicitly close files Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 11685 diff changeset	32 fp.close()
9686 ddf2adf88b89 transaction: more specific exceptions, os.unlink can raise OSError Benoit Boissinot <benoit.boissinot@ens-lyon.org> parents: 9220 diff changeset	33 except IOError:
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	34 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	35 raise
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	36 else:
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	37 try:
20084 a3378a1b0a05 transaction: unlink target file via vfs FUJIWARA Katsunori <foozy@lares.dti.ne.jp> parents: 17424 diff changeset	38 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	39 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	40 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	41 raise
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	42 opener.unlink(journal)
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	43
1559 59b3639df0a9 Convert all classes to new-style classes by deriving them from object. Eric Hopper <hopper@omnifarious.org> parents: 1541 diff changeset	44 class transaction(object):
20881 3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	45 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	46 onclose=None, onabort=None):
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	47 """Begin a new transaction
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	48
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	49 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	50 an exception.
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	51
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	52 * `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	53 * `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	54 * `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	55 closed
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	56 * `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	57 have been truncated
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	58 """
1806 a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	59 self.count = 1
11230 5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	60 self.usages = 1
582 df8a5a0098d4 Remove all remaining print statements mpm@selenic.com parents: 573 diff changeset	61 self.report = report
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	62 self.opener = opener
95 589f507bb259 Beginnings of transaction undo support mpm@selenic.com parents: 43 diff changeset	63 self.after = after
20881 3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	64 self.onclose = onclose
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	65 self.onabort = onabort
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	66 self.entries = []
42 91f1fa847158 Fix multiple changes to file per transaction mpm@selenic.com parents: 13 diff changeset	67 self.map = {}
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	68 self.journal = journal
8363 c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	69 self._queue = []
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	70
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	71 self.file = opener.open(self.journal, "w")
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	72 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	73 opener.chmod(self.journal, createmode & 0666)
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	74
9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	75 def __del__(self):
558 0ceea19182a9 transaction: __del__ should do nothing if the journal already exists mpm@selenic.com parents: 515 diff changeset	76 if self.journal:
9693 c40a1ee20aa5 transaction: always remove empty journal on abort Sune Foldager <cryo@cyanite.org> parents: 9686 diff changeset	77 self._abort()
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	78
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	79 @active
8363 c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	80 def startgroup(self):
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	81 self._queue.append([])
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	82
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	83 @active
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	84 def endgroup(self):
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	85 q = self._queue.pop()
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	86 d = ''.join(['%s\0%d\n' % (x[0], x[1]) for x in q])
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	87 self.entries.extend(q)
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	88 self.file.write(d)
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	89 self.file.flush()
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	90
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	91 @active
2084 d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	92 def add(self, file, offset, data=None):
10282 08a0f04b56bd many, many trivial check-code fixups Matt Mackall <mpm@selenic.com> parents: 10263 diff changeset	93 if file in self.map:
08a0f04b56bd many, many trivial check-code fixups Matt Mackall <mpm@selenic.com> parents: 10263 diff changeset	94 return
8363 c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	95 if self._queue:
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	96 self._queue[-1].append((file, offset, data))
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	97 return
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	98
2084 d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	99 self.entries.append((file, offset, data))
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	100 self.map[file] = len(self.entries) - 1
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	101 # 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	102 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	103 self.file.flush()
9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	104
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	105 @active
2084 d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	106 def find(self, file):
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	107 if file in self.map:
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	108 return self.entries[self.map[file]]
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	109 return None
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	110
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	111 @active
2084 d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	112 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	113 '''
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	114 replace can only replace already committed entries
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	115 that are not pending in the queue
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	116 '''
c8e81f557da7 transaction: add atomic groups to transaction logic Henrik Stuart <hg@hstuart.dk> parents: 8294 diff changeset	117
2084 d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	118 if file not in self.map:
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	119 raise KeyError(file)
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	120 index = self.map[file]
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	121 self.entries[index] = (file, offset, data)
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	122 self.file.write("%s\0%d\n" % (file, offset))
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	123 self.file.flush()
d66278012853 Chris Mason <mason@suse.com> parents: 1806 diff changeset	124
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	125 @active
1806 a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	126 def nest(self):
a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	127 self.count += 1
11230 5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	128 self.usages += 1
1806 a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	129 return self
a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	130
11230 5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	131 def release(self):
5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	132 if self.count > 0:
5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	133 self.usages -= 1
11685 aade8f133d11 cleanup: typos Patrick Mezard <pmezard@gmail.com> parents: 11230 diff changeset	134 # 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	135 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	136 self._abort()
5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	137
1806 a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	138 def running(self):
a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	139 return self.count > 0
a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	140
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	141 @active
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	142 def close(self):
9220 8a4da1388553 transaction: document close(), abort() methods Greg Ward <greg-hg@gerg.ca> parents: 9094 diff changeset	143 '''commit the transaction'''
20881 3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	144 if self.count == 1 and self.onclose is not None:
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	145 self.onclose()
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	146
1806 a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	147 self.count -= 1
a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	148 if self.count != 0:
a2c69737e65e Automatic nesting into running transactions in the same repository. mason@suse.com parents: 1559 diff changeset	149 return
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	150 self.file.close()
9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	151 self.entries = []
95 589f507bb259 Beginnings of transaction undo support mpm@selenic.com parents: 43 diff changeset	152 if self.after:
785 46a8dd3145cc Fix undo after aborted commit bug mpm@selenic.com parents: 582 diff changeset	153 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	154 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	155 self.opener.unlink(self.journal)
573 fbfbd4e506c3 transaction: nullify journal after close() mpm@selenic.com parents: 558 diff changeset	156 self.journal = None
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	157
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	158 @active
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	159 def abort(self):
9220 8a4da1388553 transaction: document close(), abort() methods Greg Ward <greg-hg@gerg.ca> parents: 9094 diff changeset	160 '''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	161 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	162 scope)'''
8289 fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	163 self._abort()
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	164
fe8a3e56039f transaction: ensure finished transactions are not reused Henrik Stuart <hg@hstuart.dk> parents: 8225 diff changeset	165 def _abort(self):
8290 560af1bbfd6e transaction: reset transaction on abort Henrik Stuart <hg@hstuart.dk> parents: 8289 diff changeset	166 self.count = 0
11230 5116a077c3da make transactions work on non-refcounted python implementations Ronny Pfannschmidt <Ronny.Pfannschmidt@gmx.de> parents: 10282 diff changeset	167 self.usages = 0
8290 560af1bbfd6e transaction: reset transaction on abort Henrik Stuart <hg@hstuart.dk> parents: 8289 diff changeset	168 self.file.close()
560af1bbfd6e transaction: reset transaction on abort Henrik Stuart <hg@hstuart.dk> parents: 8289 diff changeset	169
20881 3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	170 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	171 self.onabort()
3c47677a8d04 transaction: add onclose/onabort hook for pre-close logic Durham Goode <durham@fb.com> parents: 20524 diff changeset	172
10228 056c366fea8c transaction: initialize self.journal to None after deletion Benoit Boissinot <benoit.boissinot@ens-lyon.org> parents: 9693 diff changeset	173 try:
056c366fea8c transaction: initialize self.journal to None after deletion Benoit Boissinot <benoit.boissinot@ens-lyon.org> parents: 9693 diff changeset	174 if not self.entries:
056c366fea8c transaction: initialize self.journal to None after deletion Benoit Boissinot <benoit.boissinot@ens-lyon.org> parents: 9693 diff changeset	175 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	176 self.opener.unlink(self.journal)
10228 056c366fea8c transaction: initialize self.journal to None after deletion Benoit Boissinot <benoit.boissinot@ens-lyon.org> parents: 9693 diff changeset	177 return
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	178
10228 056c366fea8c transaction: initialize self.journal to None after deletion Benoit Boissinot <benoit.boissinot@ens-lyon.org> parents: 9693 diff changeset	179 self.report(_("transaction abort!\n"))
0 9117c6561b0b Add back links from file revisions to changeset revisions mpm@selenic.com parents: diff changeset	180
108 8d55c2d72c7c Warn if we fail to truncate something mpm@selenic.com parents: 95 diff changeset	181 try:
10282 08a0f04b56bd many, many trivial check-code fixups Matt Mackall <mpm@selenic.com> parents: 10263 diff changeset	182 _playback(self.journal, self.report, self.opener,
08a0f04b56bd many, many trivial check-code fixups Matt Mackall <mpm@selenic.com> parents: 10263 diff changeset	183 self.entries, False)
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	184 self.report(_("rollback completed\n"))
16689 f366d4c2ff34 cleanup: replace naked excepts with except Exception: ... Brodie Rao <brodie@sf.io> parents: 13408 diff changeset	185 except Exception:
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	186 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	187 finally:
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	188 self.journal = None
8290 560af1bbfd6e transaction: reset transaction on abort Henrik Stuart <hg@hstuart.dk> parents: 8289 diff changeset	189
560af1bbfd6e transaction: reset transaction on abort Henrik Stuart <hg@hstuart.dk> parents: 8289 diff changeset	190
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	191 def rollback(opener, file, report):
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	192 entries = []
48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	193
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	194 fp = opener.open(file)
13400 14f3795a5ed7 explicitly close files Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 11685 diff changeset	195 lines = fp.readlines()
14f3795a5ed7 explicitly close files Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 11685 diff changeset	196 fp.close()
14f3795a5ed7 explicitly close files Dan Villiom Podlaski Christiansen <danchr@gmail.com> parents: 11685 diff changeset	197 for l in lines:
20524 28b8ff84db3f journal: report parsing errors on recover/rollback (issue4172) Matt Mackall <mpm@selenic.com> parents: 20087 diff changeset	198 try:
28b8ff84db3f journal: report parsing errors on recover/rollback (issue4172) Matt Mackall <mpm@selenic.com> parents: 20087 diff changeset	199 f, o = l.split('\0')
28b8ff84db3f journal: report parsing errors on recover/rollback (issue4172) Matt Mackall <mpm@selenic.com> parents: 20087 diff changeset	200 entries.append((f, int(o), None))
28b8ff84db3f journal: report parsing errors on recover/rollback (issue4172) Matt Mackall <mpm@selenic.com> parents: 20087 diff changeset	201 except ValueError:
28b8ff84db3f journal: report parsing errors on recover/rollback (issue4172) Matt Mackall <mpm@selenic.com> parents: 20087 diff changeset	202 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	203
8294 48a382c23226 transaction: refactor transaction.abort and rollback to use the same code Henrik Stuart <hg@hstuart.dk> parents: 8290 diff changeset	204 _playback(file, report, opener, entries)

Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/transaction.py @ 20881:3c47677a8d04