Mercurial > hg
annotate mercurial/transaction.py @ 8573:62c996d543e6
match: kill unused defaults on _globre
author | Matt Mackall <mpm@selenic.com> |
---|---|
date | Sun, 24 May 2009 02:56:14 -0500 |
parents | c8e81f557da7 |
children | 89ae64a4e2ec |
rev | line source |
---|---|
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
1 # transaction.py - simple journalling scheme for mercurial |
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 | 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 |
46293a0c7e9f
updated license to be explicit about GPL version 2
Martin Geisler <mg@lazybytes.net>
parents:
8071
diff
changeset
|
12 # GNU General Public License version 2, incorporated herein by reference. |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
13 |
3891 | 14 from i18n import _ |
7335
866d2715aff5
add missing import from 618140c75d8d
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
7334
diff
changeset
|
15 import os, errno |
8289
fe8a3e56039f
transaction: ensure finished transactions are not reused
Henrik Stuart <hg@hstuart.dk>
parents:
8225
diff
changeset
|
16 import error |
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: |
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
30 opener(f, 'a').truncate(o) |
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
31 except: |
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
32 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
|
33 raise |
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
34 else: |
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
35 try: |
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
36 fn = opener(f).name |
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
37 os.unlink(fn) |
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
38 except OSError, inst: |
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
39 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
|
40 raise |
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
41 os.unlink(journal) |
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
42 |
1559
59b3639df0a9
Convert all classes to new-style classes by deriving them from object.
Eric Hopper <hopper@omnifarious.org>
parents:
1541
diff
changeset
|
43 class transaction(object): |
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
|
44 def __init__(self, report, opener, journal, after=None, createmode=None): |
162 | 45 self.journal = None |
46 | |
1806
a2c69737e65e
Automatic nesting into running transactions in the same repository.
mason@suse.com
parents:
1559
diff
changeset
|
47 self.count = 1 |
582 | 48 self.report = report |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
49 self.opener = opener |
95 | 50 self.after = after |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
51 self.entries = [] |
42
91f1fa847158
Fix multiple changes to file per transaction
mpm@selenic.com
parents:
13
diff
changeset
|
52 self.map = {} |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
53 self.journal = journal |
8363
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
54 self._queue = [] |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
55 |
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
56 self.file = 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
|
57 if createmode is not None: |
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
|
58 os.chmod(self.journal, createmode & 0666) |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
59 |
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
60 def __del__(self): |
558
0ceea19182a9
transaction: __del__ should do nothing if the journal already exists
mpm@selenic.com
parents:
515
diff
changeset
|
61 if self.journal: |
8289
fe8a3e56039f
transaction: ensure finished transactions are not reused
Henrik Stuart <hg@hstuart.dk>
parents:
8225
diff
changeset
|
62 if self.entries: self._abort() |
558
0ceea19182a9
transaction: __del__ should do nothing if the journal already exists
mpm@selenic.com
parents:
515
diff
changeset
|
63 self.file.close() |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
64 |
8289
fe8a3e56039f
transaction: ensure finished transactions are not reused
Henrik Stuart <hg@hstuart.dk>
parents:
8225
diff
changeset
|
65 @active |
8363
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
66 def startgroup(self): |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
67 self._queue.append([]) |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
68 |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
69 @active |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
70 def endgroup(self): |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
71 q = self._queue.pop() |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
72 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
|
73 self.entries.extend(q) |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
74 self.file.write(d) |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
75 self.file.flush() |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
76 |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
77 @active |
2084 | 78 def add(self, file, offset, data=None): |
42
91f1fa847158
Fix multiple changes to file per transaction
mpm@selenic.com
parents:
13
diff
changeset
|
79 if file in self.map: return |
8363
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
80 |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
81 if self._queue: |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
82 self._queue[-1].append((file, offset, data)) |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
83 return |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
84 |
2084 | 85 self.entries.append((file, offset, data)) |
86 self.map[file] = len(self.entries) - 1 | |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
87 # 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
|
88 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
|
89 self.file.flush() |
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
90 |
8289
fe8a3e56039f
transaction: ensure finished transactions are not reused
Henrik Stuart <hg@hstuart.dk>
parents:
8225
diff
changeset
|
91 @active |
2084 | 92 def find(self, file): |
93 if file in self.map: | |
94 return self.entries[self.map[file]] | |
95 return None | |
96 | |
8289
fe8a3e56039f
transaction: ensure finished transactions are not reused
Henrik Stuart <hg@hstuart.dk>
parents:
8225
diff
changeset
|
97 @active |
2084 | 98 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
|
99 ''' |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
100 replace can only replace already committed entries |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
101 that are not pending in the queue |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
102 ''' |
c8e81f557da7
transaction: add atomic groups to transaction logic
Henrik Stuart <hg@hstuart.dk>
parents:
8294
diff
changeset
|
103 |
2084 | 104 if file not in self.map: |
105 raise KeyError(file) | |
106 index = self.map[file] | |
107 self.entries[index] = (file, offset, data) | |
108 self.file.write("%s\0%d\n" % (file, offset)) | |
109 self.file.flush() | |
110 | |
8289
fe8a3e56039f
transaction: ensure finished transactions are not reused
Henrik Stuart <hg@hstuart.dk>
parents:
8225
diff
changeset
|
111 @active |
1806
a2c69737e65e
Automatic nesting into running transactions in the same repository.
mason@suse.com
parents:
1559
diff
changeset
|
112 def nest(self): |
a2c69737e65e
Automatic nesting into running transactions in the same repository.
mason@suse.com
parents:
1559
diff
changeset
|
113 self.count += 1 |
a2c69737e65e
Automatic nesting into running transactions in the same repository.
mason@suse.com
parents:
1559
diff
changeset
|
114 return self |
a2c69737e65e
Automatic nesting into running transactions in the same repository.
mason@suse.com
parents:
1559
diff
changeset
|
115 |
a2c69737e65e
Automatic nesting into running transactions in the same repository.
mason@suse.com
parents:
1559
diff
changeset
|
116 def running(self): |
a2c69737e65e
Automatic nesting into running transactions in the same repository.
mason@suse.com
parents:
1559
diff
changeset
|
117 return self.count > 0 |
a2c69737e65e
Automatic nesting into running transactions in the same repository.
mason@suse.com
parents:
1559
diff
changeset
|
118 |
8289
fe8a3e56039f
transaction: ensure finished transactions are not reused
Henrik Stuart <hg@hstuart.dk>
parents:
8225
diff
changeset
|
119 @active |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
120 def close(self): |
1806
a2c69737e65e
Automatic nesting into running transactions in the same repository.
mason@suse.com
parents:
1559
diff
changeset
|
121 self.count -= 1 |
a2c69737e65e
Automatic nesting into running transactions in the same repository.
mason@suse.com
parents:
1559
diff
changeset
|
122 if self.count != 0: |
a2c69737e65e
Automatic nesting into running transactions in the same repository.
mason@suse.com
parents:
1559
diff
changeset
|
123 return |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
124 self.file.close() |
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
125 self.entries = [] |
95 | 126 if self.after: |
785 | 127 self.after() |
95 | 128 else: |
129 os.unlink(self.journal) | |
573 | 130 self.journal = None |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
131 |
8289
fe8a3e56039f
transaction: ensure finished transactions are not reused
Henrik Stuart <hg@hstuart.dk>
parents:
8225
diff
changeset
|
132 @active |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
133 def abort(self): |
8289
fe8a3e56039f
transaction: ensure finished transactions are not reused
Henrik Stuart <hg@hstuart.dk>
parents:
8225
diff
changeset
|
134 self._abort() |
fe8a3e56039f
transaction: ensure finished transactions are not reused
Henrik Stuart <hg@hstuart.dk>
parents:
8225
diff
changeset
|
135 |
fe8a3e56039f
transaction: ensure finished transactions are not reused
Henrik Stuart <hg@hstuart.dk>
parents:
8225
diff
changeset
|
136 def _abort(self): |
8290
560af1bbfd6e
transaction: reset transaction on abort
Henrik Stuart <hg@hstuart.dk>
parents:
8289
diff
changeset
|
137 self.count = 0 |
560af1bbfd6e
transaction: reset transaction on abort
Henrik Stuart <hg@hstuart.dk>
parents:
8289
diff
changeset
|
138 self.file.close() |
560af1bbfd6e
transaction: reset transaction on abort
Henrik Stuart <hg@hstuart.dk>
parents:
8289
diff
changeset
|
139 |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
140 if not self.entries: return |
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
141 |
1402
9d2c2e6b32b5
i18n part2: use '_' for all strings who are part of the user interface
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
1400
diff
changeset
|
142 self.report(_("transaction abort!\n")) |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
143 |
8294
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
144 try: |
108 | 145 try: |
8294
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
146 _playback(self.journal, self.report, self.opener, self.entries, False) |
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
147 self.report(_("rollback completed\n")) |
108 | 148 except: |
8294
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
149 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
|
150 finally: |
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
151 self.journal = None |
8290
560af1bbfd6e
transaction: reset transaction on abort
Henrik Stuart <hg@hstuart.dk>
parents:
8289
diff
changeset
|
152 |
560af1bbfd6e
transaction: reset transaction on abort
Henrik Stuart <hg@hstuart.dk>
parents:
8289
diff
changeset
|
153 |
8294
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
154 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
|
155 entries = [] |
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
156 |
162 | 157 for l in open(file).readlines(): |
158 f, o = l.split('\0') | |
8294
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
159 entries.append((f, int(o), None)) |
0
9117c6561b0b
Add back links from file revisions to changeset revisions
mpm@selenic.com
parents:
diff
changeset
|
160 |
8294
48a382c23226
transaction: refactor transaction.abort and rollback to use the same code
Henrik Stuart <hg@hstuart.dk>
parents:
8290
diff
changeset
|
161 _playback(file, report, opener, entries) |