Mercurial > hg
view hgext/automv.py @ 28436:8d38eab2777a
peer: add an iterbatcher interface
This is very much like ordinary batch(), but it will let me add a mode
for batch where we have pathologically large requests which are then
handled streamily. This will be a significant improvement for things
like remotefilelog, which may want to request thousands of entities at
once.
author | Augie Fackler <augie@google.com> |
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date | Tue, 01 Mar 2016 18:39:25 -0500 |
parents | e07daee83029 |
children | a0939666b836 |
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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 import ( commands, copies, error, extensions, scmutil, similar ) from mercurial.i18n import _ def extsetup(ui): entry = extensions.wrapcommand( commands.table, 'commit', mvcheck) entry[1].append( ('', 'no-automv', None, _('disable automatic file move detection'))) def mvcheck(orig, ui, repo, *pats, **opts): """Hook to check for moves at commit time""" renames = None disabled = opts.pop('no_automv', False) if not disabled: threshold = ui.configint('automv', 'similarity', 95) if not 0 <= threshold <= 100: raise error.Abort(_('automv.similarity must be between 0 and 100')) if threshold > 0: match = scmutil.match(repo[None], pats, opts) added, removed = _interestingfiles(repo, match) renames = _findrenames(repo, match, added, removed, threshold / 100.0) with repo.wlock(): if renames is not None: scmutil._markchanges(repo, (), (), renames) return orig(ui, repo, *pats, **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[1] removed = stat[2] copy = copies._forwardcopies(repo['.'], 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, matcher, 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( _('detected move of %s as %s (%d%% similar)\n') % ( matcher.rel(src), matcher.rel(dst), score * 100)) renames[dst] = src if renames: repo.ui.status(_('detected move of %d files\n') % len(renames)) return renames