##// END OF EJS Templates
revlog: add a mechanism to verify expected file position before appending...
revlog: add a mechanism to verify expected file position before appending If someone uses `hg debuglocks`, or some non-hg process writes to the .hg directory without respecting the locks, or if the repo's on a networked filesystem, it's possible for the revlog code to write out corrupted data. The form of this corruption can vary depending on what data was written and how that happened. We are in the "networked filesystem" case (though I've had users also do this to themselves with the "`hg debuglocks`" scenario), and most often see this with the changelog. What ends up happening is we produce two items (let's call them rev1 and rev2) in the .i file that have the same linkrev, baserev, and offset into the .d file, while the data in the .d file is appended properly. rev2's compressed_size is accurate for rev2, but when we go to decompress the data in the .d file, we use the offset that's recorded in the index file, which is the same as rev1, and attempt to decompress rev2.compressed_size bytes of rev1's data. This usually does not succeed. :) When using inline data, this also fails, though I haven't investigated why too closely. This shows up as a "patch decode" error. I believe what's happening there is that we're basically ignoring the offset field, getting the data properly, but since baserev != rev, it thinks this is a delta based on rev (instead of a full text) and can't actually apply it as such. For now, I'm going to make this an optional component and default it to entirely off. I may increase the default severity of this in the future, once I've enabled it for my users and we gain more experience with it. Luckily, most of my users have a versioned filesystem and can roll back to before the corruption has been written, it's just a hassle to do so and not everyone knows how (so it's a support burden). Users on other filesystems will not have that luxury, and this can cause them to have a corrupted repository that they are unlikely to know how to resolve, and they'll see this as a data-loss event. Refusing to create the corruption is a much better user experience. This mechanism is not perfect. There may be false-negatives (racy writes that are not detected). There should not be any false-positives (non-racy writes that are detected as such). This is not a mechanism that makes putting a repo on a networked filesystem "safe" or "supported", just *less* likely to cause corruption. Differential Revision: https://phab.mercurial-scm.org/D9952

File last commit:

r43812:2fe6121c default
r47349:e9901d01 default
Show More
graphlog.py
125 lines | 3.3 KiB | text/x-python | PythonLexer
Joel Rosdahl
Add graphlog extension
r4344 # ASCII graph log extension for Mercurial
#
# Copyright 2007 Joel Rosdahl <joel@rosdahl.net>
Thomas Arendsen Hein
Removed trailing whitespace and tabs from python files
r4516 #
Martin Geisler
updated license to be explicit about GPL version 2
r8225 # This software may be used and distributed according to the terms of the
Matt Mackall
Update license to GPLv2+
r10263 # GNU General Public License version 2 or any later version.
Martin Geisler
add blank line after copyright notices and after header
r8228
Martin Geisler
graphlog: mark as deprecated
r20118 '''command to view revision graphs from a shell (DEPRECATED)
The functionality of this extension has been include in core Mercurial
timeless
graphlog: update help with replacement
r27715 since version 2.3. Please use :hg:`log -G ...` instead.
Alpar Juttner
Graphlog extension adds a --graph option to log/in/out...
r7426
This extension adds a --graph option to the incoming, outgoing and log
Martin Geisler
graphlog: wrap docstrings at 70 characters
r9259 commands. When this options is given, an ASCII representation of the
revision graph is also shown.
Alpar Juttner
Graphlog extension adds a --graph option to log/in/out...
r7426 '''
Joel Rosdahl
Add graphlog extension
r4344
Pulkit Goyal
py3: make hgext/graphlog.py use absolute_import
r29123 from __future__ import absolute_import
Joel Rosdahl
Add graphlog extension
r4344 from mercurial.i18n import _
Pulkit Goyal
py3: make hgext/graphlog.py use absolute_import
r29123 from mercurial import (
Yuya Nishihara
commands: move templates of common command options to cmdutil (API)...
r32375 cmdutil,
Pulkit Goyal
py3: make hgext/graphlog.py use absolute_import
r29123 commands,
Yuya Nishihara
registrar: move cmdutil.command to registrar module (API)...
r32337 registrar,
Pulkit Goyal
py3: make hgext/graphlog.py use absolute_import
r29123 )
Steve Borho
graphlog: add filelog revision grapher...
r5938
Adrian Buehlmann
graphlog: use cmdutil.command decorator
r14311 cmdtable = {}
Yuya Nishihara
registrar: move cmdutil.command to registrar module (API)...
r32337 command = registrar.command(cmdtable)
Augie Fackler
extensions: change magic "shipped with hg" string...
r29841 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
Augie Fackler
extensions: document that `testedwith = 'internal'` is special...
r25186 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
# be specifying the version(s) of Mercurial they are tested with, or
# leave the attribute unspecified.
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 testedwith = b'ships-with-hg-core'
Adrian Buehlmann
graphlog: use cmdutil.command decorator
r14311
Augie Fackler
formatting: blacken the codebase...
r43346
@command(
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 b'glog',
Augie Fackler
formatting: blacken the codebase...
r43346 [
(
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 b'f',
b'follow',
Augie Fackler
formatting: blacken the codebase...
r43346 None,
_(
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 b'follow changeset history, or file history across copies and renames'
Augie Fackler
formatting: blacken the codebase...
r43346 ),
),
(
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 b'',
b'follow-first',
Augie Fackler
formatting: blacken the codebase...
r43346 None,
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 _(b'only follow the first parent of merge changesets (DEPRECATED)'),
Augie Fackler
formatting: blacken the codebase...
r43346 ),
(
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 b'd',
b'date',
b'',
_(b'show revisions matching date spec'),
_(b'DATE'),
),
(b'C', b'copies', None, _(b'show copied files')),
(
b'k',
b'keyword',
Augie Fackler
formatting: blacken the codebase...
r43346 [],
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 _(b'do case-insensitive search for a given text'),
_(b'TEXT'),
),
(
b'r',
b'rev',
[],
_(b'show the specified revision or revset'),
_(b'REV'),
Augie Fackler
formatting: blacken the codebase...
r43346 ),
(
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 b'',
b'removed',
None,
_(b'include revisions where files were removed'),
),
(b'm', b'only-merges', None, _(b'show only merges (DEPRECATED)')),
(b'u', b'user', [], _(b'revisions committed by user'), _(b'USER')),
(
b'',
b'only-branch',
Augie Fackler
formatting: blacken the codebase...
r43346 [],
_(
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 b'show only changesets within the given named branch (DEPRECATED)'
Augie Fackler
formatting: blacken the codebase...
r43346 ),
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 _(b'BRANCH'),
Augie Fackler
formatting: blacken the codebase...
r43346 ),
(
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 b'b',
b'branch',
Augie Fackler
formatting: blacken the codebase...
r43346 [],
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 _(b'show changesets within the given named branch'),
_(b'BRANCH'),
Augie Fackler
formatting: blacken the codebase...
r43346 ),
(
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 b'P',
b'prune',
Augie Fackler
formatting: blacken the codebase...
r43346 [],
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 _(b'do not display revision or any of its ancestors'),
_(b'REV'),
Augie Fackler
formatting: blacken the codebase...
r43346 ),
]
+ cmdutil.logopts
+ cmdutil.walkopts,
Augie Fackler
formatting: byteify all mercurial/ and hgext/ string literals...
r43347 _(b'[OPTION]... [FILE]'),
rdamazio@google.com
help: assigning categories to existing commands...
r40329 helpcategory=command.CATEGORY_CHANGE_NAVIGATION,
Augie Fackler
formatting: blacken the codebase...
r43346 inferrepo=True,
)
timeless
graphlog: rename glog function...
r27149 def glog(ui, repo, *pats, **opts):
Peter Arrenbrecht
graphlog: split the actual DAG grapher out into a separate method...
r7325 """show revision history alongside an ASCII revision graph
Martin Geisler
graphlog: wrap docstrings at 70 characters
r9259 Print a revision history alongside a revision graph drawn with
ASCII characters.
Peter Arrenbrecht
graphlog: split the actual DAG grapher out into a separate method...
r7325
Martin Geisler
graphlog: wrap docstrings at 70 characters
r9259 Nodes printed as an @ character are parents of the working
directory.
timeless
graphlog: update help with replacement
r27715
This is an alias to :hg:`log -G`.
Peter Arrenbrecht
graphlog: split the actual DAG grapher out into a separate method...
r7325 """
Augie Fackler
cleanup: remove pointless r-prefixes on single-quoted strings...
r43906 opts['graph'] = True
Yuya Nishihara
graphlog: do not bypass commands.log so that -fr works...
r24200 return commands.log(ui, repo, *pats, **opts)