Mercurial > hg
view hgext/automv.py @ 48598:a6f16ec07ed7
stream-clone: add a explicit test for format change during stream clone
They are different kind of requirements, the one which impact the data storage
and are relevant to the files being streamed and the one which does not. For
example some requirements are only relevant to the working copy, like sparse, or
dirstate-v2.
Since they are irrelevant to the content being streamed, they do not prevent the
receiving side to use streaming clone and mercurial skip adverting them over
the wire and, ideally, within the bundle.
In addition, this let the client decide to use whichever format it desire for
the part that does not affect the store itself. So the configuration related to
these format are used as normal when doing a streaming clone.
In practice, the feature was not really tested and is badly broken with bundle-2,
since the requirements are not filtered out from the stream bundle.
So we start with adding simple tests as a good base before the fix and adjust
the feature.
Differential Revision: https://phab.mercurial-scm.org/D12029
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Mon, 17 Jan 2022 18:51:47 +0100 |
parents | 89a2afe31e82 |
children | 6000f5b25c9b |
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# automv.py # # Copyright 2013-2016 Facebook, Inc. # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. """check for unrecorded moves at commit time (EXPERIMENTAL) This extension checks at commit/amend time if any of the committed files comes from an unrecorded mv. The threshold at which a file is considered a move can be set with the ``automv.similarity`` config option. This option takes a percentage between 0 (disabled) and 100 (files must be identical), the default is 95. """ # Using 95 as a default similarity is based on an analysis of the mercurial # repositories of the cpython, mozilla-central & mercurial repositories, as # well as 2 very large facebook repositories. At 95 50% of all potential # missed moves would be caught, as well as correspond with 87% of all # explicitly marked moves. Together, 80% of moved files are 95% similar or # more. # # See http://markmail.org/thread/5pxnljesvufvom57 for context. from __future__ import absolute_import from mercurial.i18n import _ from mercurial import ( commands, copies, error, extensions, pycompat, registrar, scmutil, similar, ) configtable = {} configitem = registrar.configitem(configtable) configitem( b'automv', b'similarity', default=95, ) def extsetup(ui): entry = extensions.wrapcommand(commands.table, b'commit', mvcheck) entry[1].append( (b'', b'no-automv', None, _(b'disable automatic file move detection')) ) def mvcheck(orig, ui, repo, *pats, **opts): """Hook to check for moves at commit time""" opts = pycompat.byteskwargs(opts) renames = None disabled = opts.pop(b'no_automv', False) if not disabled: threshold = ui.configint(b'automv', b'similarity') if not 0 <= threshold <= 100: raise error.Abort(_(b'automv.similarity must be between 0 and 100')) if threshold > 0: match = scmutil.match(repo[None], pats, opts) added, removed = _interestingfiles(repo, match) uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=True) renames = _findrenames( repo, uipathfn, added, removed, threshold / 100.0 ) with repo.wlock(): if renames is not None: scmutil._markchanges(repo, (), (), renames) return orig(ui, repo, *pats, **pycompat.strkwargs(opts)) def _interestingfiles(repo, matcher): """Find what files were added or removed in this commit. Returns a tuple of two lists: (added, removed). Only files not *already* marked as moved are included in the added list. """ stat = repo.status(match=matcher) added = stat.added removed = stat.removed copy = copies.pathcopies(repo[b'.'], repo[None], matcher) # remove the copy files for which we already have copy info added = [f for f in added if f not in copy] return added, removed def _findrenames(repo, uipathfn, added, removed, similarity): """Find what files in added are really moved files. Any file named in removed that is at least similarity% similar to a file in added is seen as a rename. """ renames = {} if similarity > 0: for src, dst, score in similar.findrenames( repo, added, removed, similarity ): if repo.ui.verbose: repo.ui.status( _(b'detected move of %s as %s (%d%% similar)\n') % (uipathfn(src), uipathfn(dst), score * 100) ) renames[dst] = src if renames: repo.ui.status(_(b'detected move of %d files\n') % len(renames)) return renames