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# keyword.py - $Keyword$ expansion for Mercurial
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#
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# Copyright 2007, 2008 Christian Ebert <blacktrash@gmx.net>
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#
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# This software may be used and distributed according to the terms
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# of the GNU General Public License, incorporated herein by reference.
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#
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# $Id$
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#
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# Keyword expansion hack against the grain of a DSCM
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#
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# There are many good reasons why this is not needed in a distributed
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# SCM, still it may be useful in very small projects based on single
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# files (like LaTeX packages), that are mostly addressed to an audience
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# not running a version control system.
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#
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# For in-depth discussion refer to
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# <http://www.selenic.com/mercurial/wiki/index.cgi/KeywordPlan>.
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#
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# Keyword expansion is based on Mercurial's changeset template mappings.
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#
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# Binary files are not touched.
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#
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# Setup in hgrc:
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#
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# [extensions]
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# # enable extension
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# hgext.keyword =
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#
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# Files to act upon/ignore are specified in the [keyword] section.
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# Customized keyword template mappings in the [keywordmaps] section.
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#
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# Run "hg help keyword" and "hg kwdemo" to get info on configuration.
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'''keyword expansion in local repositories
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This extension expands RCS/CVS-like or self-customized $Keywords$
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in tracked text files selected by your configuration.
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Keywords are only expanded in local repositories and not stored in
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the change history. The mechanism can be regarded as a convenience
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for the current user or for archive distribution.
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Configuration is done in the [keyword] and [keywordmaps] sections
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of hgrc files.
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Example:
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[keyword]
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# expand keywords in every python file except those matching "x*"
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**.py =
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x* = ignore
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Note: the more specific you are in your filename patterns
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the less you lose speed in huge repos.
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For [keywordmaps] template mapping and expansion demonstration and
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control run "hg kwdemo".
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An additional date template filter {date|utcdate} is provided.
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The default template mappings (view with "hg kwdemo -d") can be replaced
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with customized keywords and templates.
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Again, run "hg kwdemo" to control the results of your config changes.
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Before changing/disabling active keywords, run "hg kwshrink" to avoid
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the risk of inadvertedly storing expanded keywords in the change history.
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To force expansion after enabling it, or a configuration change, run
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"hg kwexpand".
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Also, when committing with the record extension or using mq's qrecord, be aware
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that keywords cannot be updated. Again, run "hg kwexpand" on the files in
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question to update keyword expansions after all changes have been checked in.
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Expansions spanning more than one line and incremental expansions,
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like CVS' $Log$, are not supported. A keyword template map
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"Log = {desc}" expands to the first line of the changeset description.
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'''
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from mercurial import commands, cmdutil, context, dispatch, filelog, revlog
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from mercurial import patch, localrepo, templater, templatefilters, util
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from mercurial.node import *
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from mercurial.i18n import _
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import re, shutil, tempfile, time, os
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commands.optionalrepo += ' kwdemo'
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# hg commands that do not act on keywords
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nokwcommands = ('add addremove bundle copy export grep identify incoming init'
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' log outgoing push remove rename rollback tip convert email')
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# hg commands that trigger expansion only when writing to working dir,
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# not when reading filelog, and unexpand when reading from working dir
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restricted = 'diff1 record qfold qimport qnew qpush qrefresh qrecord'
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def utcdate(date):
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'''Returns hgdate in cvs-like UTC format.'''
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return time.strftime('%Y/%m/%d %H:%M:%S', time.gmtime(date[0]))
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_kwtemplater, _cmd, _cmdoptions = None, None, None
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# store originals of monkeypatches
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_patchfile_init = patch.patchfile.__init__
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_dispatch_parse = dispatch._parse
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def _kwpatchfile_init(self, ui, fname, missing=False):
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'''Monkeypatch/wrap patch.patchfile.__init__ to avoid
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rejects or conflicts due to expanded keywords in working dir.'''
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_patchfile_init(self, ui, fname, missing=missing)
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if _kwtemplater.matcher(self.fname):
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# shrink keywords read from working dir
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kwshrunk = _kwtemplater.shrink(''.join(self.lines))
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self.lines = kwshrunk.splitlines(True)
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def _kwdispatch_parse(ui, args):
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'''Monkeypatch dispatch._parse to obtain
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current command and command options (global _cmd, _cmdoptions).'''
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global _cmd, _cmdoptions
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_cmd, func, args, options, _cmdoptions = _dispatch_parse(ui, args)
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return _cmd, func, args, options, _cmdoptions
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dispatch._parse = _kwdispatch_parse
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class kwtemplater(object):
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'''
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Sets up keyword templates, corresponding keyword regex, and
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provides keyword substitution functions.
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'''
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templates = {
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'Revision': '{node|short}',
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'Author': '{author|user}',
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'Date': '{date|utcdate}',
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'RCSFile': '{file|basename},v',
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'Source': '{root}/{file},v',
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'Id': '{file|basename},v {node|short} {date|utcdate} {author|user}',
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'Header': '{root}/{file},v {node|short} {date|utcdate} {author|user}',
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}
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def __init__(self, ui, repo, inc, exc, restrict):
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self.ui = ui
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self.repo = repo
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self.matcher = util.matcher(repo.root, inc=inc, exc=exc)[1]
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self.restrict = restrict
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self.commitnode = None
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self.path = ''
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kwmaps = self.ui.configitems('keywordmaps')
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if kwmaps: # override default templates
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kwmaps = [(k, templater.parsestring(v, quoted=False))
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for (k, v) in kwmaps]
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self.templates = dict(kwmaps)
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escaped = map(re.escape, self.templates.keys())
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kwpat = r'\$(%s)(: [^$\n\r]*? )??\$' % '|'.join(escaped)
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self.re_kw = re.compile(kwpat)
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templatefilters.filters['utcdate'] = utcdate
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self.ct = cmdutil.changeset_templater(self.ui, self.repo,
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False, '', False)
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def substitute(self, node, data, subfunc):
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'''Obtains file's changenode if commit node not given,
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and calls given substitution function.'''
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if self.commitnode:
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fnode = self.commitnode
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else:
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c = context.filectx(self.repo, self.path, fileid=node)
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fnode = c.node()
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def kwsub(mobj):
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'''Substitutes keyword using corresponding template.'''
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kw = mobj.group(1)
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self.ct.use_template(self.templates[kw])
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self.ui.pushbuffer()
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self.ct.show(changenode=fnode, root=self.repo.root, file=self.path)
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ekw = templatefilters.firstline(self.ui.popbuffer())
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return '$%s: %s $' % (kw, ekw)
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return subfunc(kwsub, data)
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def expand(self, node, data):
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'''Returns data with keywords expanded.'''
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if self.restrict or util.binary(data):
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return data
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return self.substitute(node, data, self.re_kw.sub)
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def process(self, node, data, expand):
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'''Returns a tuple: data, count.
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Count is number of keywords/keyword substitutions,
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telling caller whether to act on file containing data.'''
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if util.binary(data):
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return data, None
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if expand:
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return self.substitute(node, data, self.re_kw.subn)
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return data, self.re_kw.search(data)
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def shrink(self, text):
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'''Returns text with all keyword substitutions removed.'''
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if util.binary(text):
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return text
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return self.re_kw.sub(r'$\1$', text)
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class kwfilelog(filelog.filelog):
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'''
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Subclass of filelog to hook into its read, add, cmp methods.
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Keywords are "stored" unexpanded, and processed on reading.
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'''
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def __init__(self, opener, path):
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super(kwfilelog, self).__init__(opener, path)
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_kwtemplater.path = path
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def kwctread(self, node, expand):
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'''Reads expanding and counting keywords, called from _overwrite.'''
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data = super(kwfilelog, self).read(node)
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return _kwtemplater.process(node, data, expand)
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def read(self, node):
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'''Expands keywords when reading filelog.'''
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data = super(kwfilelog, self).read(node)
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return _kwtemplater.expand(node, data)
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def add(self, text, meta, tr, link, p1=None, p2=None):
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'''Removes keyword substitutions when adding to filelog.'''
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text = _kwtemplater.shrink(text)
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return super(kwfilelog, self).add(text, meta, tr, link, p1=p1, p2=p2)
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def cmp(self, node, text):
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'''Removes keyword substitutions for comparison.'''
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text = _kwtemplater.shrink(text)
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if self.renamed(node):
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t2 = super(kwfilelog, self).read(node)
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return t2 != text
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return revlog.revlog.cmp(self, node, text)
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def _iskwfile(f, link):
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return not link(f) and _kwtemplater.matcher(f)
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def _status(ui, repo, *pats, **opts):
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'''Bails out if [keyword] configuration is not active.
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Returns status of working directory.'''
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if _kwtemplater:
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files, match, anypats = cmdutil.matchpats(repo, pats, opts)
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return repo.status(files=files, match=match, list_clean=True)
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if ui.configitems('keyword'):
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raise util.Abort(_('[keyword] patterns cannot match'))
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raise util.Abort(_('no [keyword] patterns configured'))
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def _overwrite(ui, repo, node=None, expand=True, files=None):
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'''Overwrites selected files expanding/shrinking keywords.'''
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ctx = repo.changectx(node)
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mf = ctx.manifest()
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if node is not None: # commit
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_kwtemplater.commitnode = node
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files = [f for f in ctx.files() if f in mf]
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notify = ui.debug
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else: # kwexpand/kwshrink
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notify = ui.note
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candidates = [f for f in files if _iskwfile(f, mf.linkf)]
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if candidates:
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candidates.sort()
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action = expand and 'expanding' or 'shrinking'
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for f in candidates:
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fp = repo.file(f, kwmatch=True)
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data, kwfound = fp.kwctread(mf[f], expand)
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if kwfound:
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notify(_('overwriting %s %s keywords\n') % (f, action))
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repo.wwrite(f, data, mf.flags(f))
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repo.dirstate.normal(f)
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def _kwfwrite(ui, repo, expand, *pats, **opts):
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'''Selects files and passes them to _overwrite.'''
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status = _status(ui, repo, *pats, **opts)
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modified, added, removed, deleted, unknown, ignored, clean = status
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if modified or added or removed or deleted:
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raise util.Abort(_('outstanding uncommitted changes in given files'))
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wlock = lock = None
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try:
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wlock = repo.wlock()
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lock = repo.lock()
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_overwrite(ui, repo, expand=expand, files=clean)
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finally:
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del wlock, lock
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def demo(ui, repo, *args, **opts):
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'''print [keywordmaps] configuration and an expansion example
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Show current, custom, or default keyword template maps
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and their expansion.
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Extend current configuration by specifying maps as arguments
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and optionally by reading from an additional hgrc file.
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Override current keyword template maps with "default" option.
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'''
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def demostatus(stat):
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ui.status(_('\n\t%s\n') % stat)
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def demoitems(section, items):
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ui.write('[%s]\n' % section)
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for k, v in items:
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ui.write('%s = %s\n' % (k, v))
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msg = 'hg keyword config and expansion example'
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kwstatus = 'current'
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fn = 'demo.txt'
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branchname = 'demobranch'
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tmpdir = tempfile.mkdtemp('', 'kwdemo.')
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ui.note(_('creating temporary repo at %s\n') % tmpdir)
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repo = localrepo.localrepository(ui, path=tmpdir, create=True)
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ui.setconfig('keyword', fn, '')
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if args or opts.get('rcfile'):
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kwstatus = 'custom'
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if opts.get('rcfile'):
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ui.readconfig(opts.get('rcfile'))
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if opts.get('default'):
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kwstatus = 'default'
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kwmaps = kwtemplater.templates
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if ui.configitems('keywordmaps'):
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# override maps from optional rcfile
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for k, v in kwmaps.iteritems():
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ui.setconfig('keywordmaps', k, v)
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elif args:
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# simulate hgrc parsing
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rcmaps = ['[keywordmaps]\n'] + [a + '\n' for a in args]
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fp = repo.opener('hgrc', 'w')
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fp.writelines(rcmaps)
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fp.close()
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ui.readconfig(repo.join('hgrc'))
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if not opts.get('default'):
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kwmaps = dict(ui.configitems('keywordmaps')) or kwtemplater.templates
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reposetup(ui, repo)
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for k, v in ui.configitems('extensions'):
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if k.endswith('keyword'):
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extension = '%s = %s' % (k, v)
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break
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demostatus('config using %s keyword template maps' % kwstatus)
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ui.write('[extensions]\n%s\n' % extension)
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demoitems('keyword', ui.configitems('keyword'))
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demoitems('keywordmaps', kwmaps.iteritems())
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keywords = '$' + '$\n$'.join(kwmaps.keys()) + '$\n'
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repo.wopener(fn, 'w').write(keywords)
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repo.add([fn])
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path = repo.wjoin(fn)
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ui.note(_('\n%s keywords written to %s:\n') % (kwstatus, path))
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ui.note(keywords)
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ui.note('\nhg -R "%s" branch "%s"\n' % (tmpdir, branchname))
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# silence branch command if not verbose
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quiet = ui.quiet
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ui.quiet = not ui.verbose
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commands.branch(ui, repo, branchname)
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ui.quiet = quiet
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for name, cmd in ui.configitems('hooks'):
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if name.split('.', 1)[0].find('commit') > -1:
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repo.ui.setconfig('hooks', name, '')
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ui.note(_('unhooked all commit hooks\n'))
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ui.note('hg -R "%s" ci -m "%s"\n' % (tmpdir, msg))
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repo.commit(text=msg)
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format = ui.verbose and ' in %s' % path or ''
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demostatus('%s keywords expanded%s' % (kwstatus, format))
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ui.write(repo.wread(fn))
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ui.debug(_('\nremoving temporary repo %s\n') % tmpdir)
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shutil.rmtree(tmpdir, ignore_errors=True)
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def expand(ui, repo, *pats, **opts):
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'''expand keywords in working directory
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Run after (re)enabling keyword expansion.
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kwexpand refuses to run if given files contain local changes.
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'''
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# 3rd argument sets expansion to True
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_kwfwrite(ui, repo, True, *pats, **opts)
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def files(ui, repo, *pats, **opts):
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'''print files currently configured for keyword expansion
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Crosscheck which files in working directory are potential targets for
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keyword expansion.
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That is, files matched by [keyword] config patterns but not symlinks.
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'''
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status = _status(ui, repo, *pats, **opts)
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modified, added, removed, deleted, unknown, ignored, clean = status
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files = modified + added + clean
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if opts.get('untracked'):
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files += unknown
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files.sort()
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wctx = repo.workingctx()
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islink = lambda p: 'l' in wctx.fileflags(p)
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kwfiles = [f for f in files if _iskwfile(f, islink)]
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cwd = pats and repo.getcwd() or ''
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kwfstats = not opts.get('ignore') and (('K', kwfiles),) or ()
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if opts.get('all') or opts.get('ignore'):
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kwfstats += (('I', [f for f in files if f not in kwfiles]),)
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for char, filenames in kwfstats:
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format = (opts.get('all') or ui.verbose) and '%s %%s\n' % char or '%s\n'
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for f in filenames:
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ui.write(format % repo.pathto(f, cwd))
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def shrink(ui, repo, *pats, **opts):
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'''revert expanded keywords in working directory
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Run before changing/disabling active keywords
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or if you experience problems with "hg import" or "hg merge".
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kwshrink refuses to run if given files contain local changes.
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'''
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# 3rd argument sets expansion to False
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_kwfwrite(ui, repo, False, *pats, **opts)
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def reposetup(ui, repo):
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'''Sets up repo as kwrepo for keyword substitution.
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Overrides file method to return kwfilelog instead of filelog
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if file matches user configuration.
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Wraps commit to overwrite configured files with updated
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keyword substitutions.
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This is done for local repos only, and only if there are
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files configured at all for keyword substitution.'''
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global _kwtemplater
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hgcmd, hgcmdopts = _cmd, _cmdoptions
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try:
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if (not repo.local() or hgcmd in nokwcommands.split()
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or '.hg' in repo.root.split(os.sep)
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or repo._url.startswith('bundle:')):
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return
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except AttributeError:
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pass
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inc, exc = [], ['.hg*']
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for pat, opt in ui.configitems('keyword'):
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if opt != 'ignore':
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inc.append(pat)
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else:
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exc.append(pat)
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if not inc:
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return
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if hgcmd == 'diff':
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# only expand if comparing against working dir
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node1, node2 = cmdutil.revpair(repo, hgcmdopts.get('rev'))
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if node2 is not None:
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return
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# shrink if rev is not current node
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if node1 is not None and node1 != repo.changectx().node():
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hgcmd = 'diff1'
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restrict = hgcmd in restricted.split()
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_kwtemplater = kwtemplater(ui, repo, inc, exc, restrict)
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class kwrepo(repo.__class__):
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def file(self, f, kwmatch=False):
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if f[0] == '/':
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f = f[1:]
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if kwmatch or _kwtemplater.matcher(f):
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return kwfilelog(self.sopener, f)
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return filelog.filelog(self.sopener, f)
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def wread(self, filename):
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data = super(kwrepo, self).wread(filename)
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if restrict and _kwtemplater.matcher(filename):
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return _kwtemplater.shrink(data)
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return data
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def commit(self, files=None, text='', user=None, date=None,
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match=util.always, force=False, force_editor=False,
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p1=None, p2=None, extra={}, empty_ok=False):
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wlock = lock = None
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|
_p1 = _p2 = None
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try:
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wlock = self.wlock()
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|
lock = self.lock()
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|
# store and postpone commit hooks
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|
|
commithooks = {}
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for name, cmd in ui.configitems('hooks'):
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if name.split('.', 1)[0] == 'commit':
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commithooks[name] = cmd
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ui.setconfig('hooks', name, None)
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|
if commithooks:
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|
# store parents for commit hook environment
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if p1 is None:
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|
_p1, _p2 = repo.dirstate.parents()
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|
else:
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|
|
_p1, _p2 = p1, p2 or nullid
|
|
|
_p1 = hex(_p1)
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|
|
if _p2 == nullid:
|
|
|
_p2 = ''
|
|
|
else:
|
|
|
_p2 = hex(_p2)
|
|
|
|
|
|
node = super(kwrepo,
|
|
|
self).commit(files=files, text=text, user=user,
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|
|
date=date, match=match, force=force,
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|
|
force_editor=force_editor,
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|
|
p1=p1, p2=p2, extra=extra,
|
|
|
empty_ok=empty_ok)
|
|
|
|
|
|
# restore commit hooks
|
|
|
for name, cmd in commithooks.iteritems():
|
|
|
ui.setconfig('hooks', name, cmd)
|
|
|
if node is not None:
|
|
|
_overwrite(ui, self, node=node)
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|
|
repo.hook('commit', node=node, parent1=_p1, parent2=_p2)
|
|
|
return node
|
|
|
finally:
|
|
|
del wlock, lock
|
|
|
|
|
|
repo.__class__ = kwrepo
|
|
|
patch.patchfile.__init__ = _kwpatchfile_init
|
|
|
|
|
|
|
|
|
cmdtable = {
|
|
|
'kwdemo':
|
|
|
(demo,
|
|
|
[('d', 'default', None, _('show default keyword template maps')),
|
|
|
('f', 'rcfile', [], _('read maps from rcfile'))],
|
|
|
_('hg kwdemo [-d] [-f RCFILE] [TEMPLATEMAP]...')),
|
|
|
'kwexpand': (expand, commands.walkopts,
|
|
|
_('hg kwexpand [OPTION]... [FILE]...')),
|
|
|
'kwfiles':
|
|
|
(files,
|
|
|
[('a', 'all', None, _('show keyword status flags of all files')),
|
|
|
('i', 'ignore', None, _('show files excluded from expansion')),
|
|
|
('u', 'untracked', None, _('additionally show untracked files')),
|
|
|
] + commands.walkopts,
|
|
|
_('hg kwfiles [OPTION]... [FILE]...')),
|
|
|
'kwshrink': (shrink, commands.walkopts,
|
|
|
_('hg kwshrink [OPTION]... [FILE]...')),
|
|
|
}
|
|
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|
