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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 of the
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# GNU General Public License version 2, 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
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# audience 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://mercurial.selenic.com/wiki/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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# 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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'''expand keywords in tracked files
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This extension expands RCS/CVS-like or self-customized $Keywords$ in tracked
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text files selected by your configuration.
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Keywords are only expanded in local repositories and not stored in the change
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history. The mechanism can be regarded as a convenience for the current user
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or for archive distribution.
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Configuration is done in the [keyword] and [keywordmaps] sections of hgrc
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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 the less you lose
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speed in huge repositories.
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For [keywordmaps] template mapping and expansion demonstration and control run
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"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 with
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customized keywords and templates. Again, run "hg kwdemo" to control the
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results of your config changes.
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Before changing/disabling active keywords, run "hg kwshrink" to avoid the risk
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of inadvertently storing expanded keywords in the change history.
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To force expansion after enabling it, or a configuration change, run "hg
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kwexpand".
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Also, when committing with the record extension or using mq's qrecord, be
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aware that keywords cannot be updated. Again, run "hg kwexpand" on the files
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in question to update keyword expansions after all changes have been checked
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in.
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Expansions spanning more than one line and incremental expansions, like CVS'
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$Log$, are not supported. A keyword template map "Log = {desc}" expands to the
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first line of the changeset description.
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'''
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from mercurial import commands, cmdutil, dispatch, filelog, revlog, extensions
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from mercurial import patch, localrepo, templater, templatefilters, util, match
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from mercurial.hgweb import webcommands
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from mercurial.lock import release
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from mercurial.node import nullid
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from mercurial.i18n import _
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import re, shutil, tempfile, time
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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 annotate bundle copy export grep incoming init'
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' log outgoing push rename rollback tip verify'
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' convert email glog')
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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 = 'merge record resolve 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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# make keyword tools accessible
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kwtools = {'templater': None, 'hgcmd': '', 'inc': [], 'exc': ['.hg*']}
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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):
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self.ui = ui
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self.repo = repo
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self.match = match.match(repo.root, '', [],
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kwtools['inc'], kwtools['exc'])
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self.restrict = kwtools['hgcmd'] in restricted.split()
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kwmaps = self.ui.configitems('keywordmaps')
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if kwmaps: # override default templates
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self.templates = dict((k, templater.parsestring(v, False))
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for k, v in kwmaps)
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escaped = map(re.escape, self.templates.keys())
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kwpat = r'\$(%s)(: [^$\n\r]*? )??\$' % '|'.join(escaped)
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self.re_kw = re.compile(kwpat)
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templatefilters.filters['utcdate'] = utcdate
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self.ct = cmdutil.changeset_templater(self.ui, self.repo,
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False, None, '', False)
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def substitute(self, data, path, ctx, subfunc):
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'''Replaces keywords in data with expanded template.'''
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def kwsub(mobj):
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kw = mobj.group(1)
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self.ct.use_template(self.templates[kw])
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self.ui.pushbuffer()
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self.ct.show(ctx, root=self.repo.root, file=path)
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ekw = templatefilters.firstline(self.ui.popbuffer())
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return '$%s: %s $' % (kw, ekw)
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return subfunc(kwsub, data)
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def expand(self, path, node, data):
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'''Returns data with keywords expanded.'''
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if not self.restrict and self.match(path) and not util.binary(data):
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ctx = self.repo.filectx(path, fileid=node).changectx()
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return self.substitute(data, path, ctx, self.re_kw.sub)
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return data
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def iskwfile(self, path, flagfunc):
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'''Returns true if path matches [keyword] pattern
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and is not a symbolic link.
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Caveat: localrepository._link fails on Windows.'''
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return self.match(path) and not 'l' in flagfunc(path)
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def overwrite(self, node, expand, files):
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'''Overwrites selected files expanding/shrinking keywords.'''
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ctx = self.repo[node]
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mf = ctx.manifest()
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if node is not None: # commit
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files = [f for f in ctx.files() if f in mf]
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notify = self.ui.debug
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else: # kwexpand/kwshrink
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notify = self.ui.note
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candidates = [f for f in files if self.iskwfile(f, ctx.flags)]
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if candidates:
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self.restrict = True # do not expand when reading
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msg = (expand and _('overwriting %s expanding keywords\n')
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or _('overwriting %s shrinking keywords\n'))
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for f in candidates:
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fp = self.repo.file(f)
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data = fp.read(mf[f])
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if util.binary(data):
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continue
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if expand:
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if node is None:
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ctx = self.repo.filectx(f, fileid=mf[f]).changectx()
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data, found = self.substitute(data, f, ctx,
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self.re_kw.subn)
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else:
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found = self.re_kw.search(data)
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if found:
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notify(msg % f)
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self.repo.wwrite(f, data, mf.flags(f))
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if node is None:
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self.repo.dirstate.normal(f)
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self.restrict = False
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def shrinktext(self, text):
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'''Unconditionally removes all keyword substitutions from text.'''
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return self.re_kw.sub(r'$\1$', text)
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def shrink(self, fname, text):
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'''Returns text with all keyword substitutions removed.'''
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if self.match(fname) and not util.binary(text):
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return self.shrinktext(text)
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return text
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def shrinklines(self, fname, lines):
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'''Returns lines with keyword substitutions removed.'''
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if self.match(fname):
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text = ''.join(lines)
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if not util.binary(text):
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return self.shrinktext(text).splitlines(True)
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return lines
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def wread(self, fname, data):
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'''If in restricted mode returns data read from wdir with
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keyword substitutions removed.'''
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return self.restrict and self.shrink(fname, data) or data
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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, kwt, path):
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super(kwfilelog, self).__init__(opener, path)
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self.kwt = kwt
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self.path = path
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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 self.kwt.expand(self.path, 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 = self.kwt.shrink(self.path, text)
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return super(kwfilelog, self).add(text, meta, tr, link, p1, p2)
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def cmp(self, node, text):
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'''Removes keyword substitutions for comparison.'''
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text = self.kwt.shrink(self.path, 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 _status(ui, repo, kwt, unknown, *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 kwt:
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match = cmdutil.match(repo, pats, opts)
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return repo.status(match=match, unknown=unknown, 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 _kwfwrite(ui, repo, expand, *pats, **opts):
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'''Selects files and passes them to kwtemplater.overwrite.'''
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if repo.dirstate.parents()[1] != nullid:
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raise util.Abort(_('outstanding uncommitted merge'))
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kwt = kwtools['templater']
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status = _status(ui, repo, kwt, False, *pats, **opts)
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modified, added, removed, deleted = status[:4]
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if modified or added or removed or deleted:
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raise util.Abort(_('outstanding uncommitted changes'))
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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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kwt.overwrite(None, expand, status[6])
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finally:
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release(lock, wlock)
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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 and their
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expansions.
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Extend current configuration by specifying maps as arguments and
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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 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 repository at %s\n') % tmpdir)
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repo = localrepo.localrepository(ui, tmpdir, 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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uisetup(ui)
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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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ui.status(_('\n\tconfig using %s keyword template maps\n') % 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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fmt = ui.verbose and ' in %s' % path or ''
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ui.status(_('\n\t%s keywords expanded%s\n') % (kwstatus, fmt))
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ui.write(repo.wread(fn))
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ui.debug(_('\nremoving temporary repository %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 the 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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'''show files configured for keyword expansion
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List which files in the working directory are matched by the [keyword]
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configuration patterns.
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Useful to prevent inadvertent keyword expansion and to speed up execution
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by including only files that are actual candidates for expansion.
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See "hg help keyword" on how to construct patterns both for inclusion and
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exclusion of files.
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Use -u/--untracked to list untracked files as well.
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With -a/--all and -v/--verbose the codes used to show the status of files
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are:
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K = keyword expansion candidate
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k = keyword expansion candidate (untracked)
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I = ignored
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i = ignored (untracked)
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'''
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kwt = kwtools['templater']
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status = _status(ui, repo, kwt, opts.get('untracked'), *pats, **opts)
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modified, added, removed, deleted, unknown, ignored, clean = status
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files = sorted(modified + added + clean)
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wctx = repo[None]
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kwfiles = [f for f in files if kwt.iskwfile(f, wctx.flags)]
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kwuntracked = [f for f in unknown if kwt.iskwfile(f, wctx.flags)]
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cwd = pats and repo.getcwd() or ''
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kwfstats = (not opts.get('ignore') and
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(('K', kwfiles), ('k', kwuntracked),) 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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('i', [f for f in unknown if f not in kwuntracked]),)
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for char, filenames in kwfstats:
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fmt = (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(fmt % repo.pathto(f, cwd))
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def shrink(ui, repo, *pats, **opts):
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'''revert expanded keywords in the working directory
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Run before changing/disabling active keywords or if you experience
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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 uisetup(ui):
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'''Collects [keyword] config in kwtools.
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Monkeypatches dispatch._parse if needed.'''
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for pat, opt in ui.configitems('keyword'):
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if opt != 'ignore':
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kwtools['inc'].append(pat)
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else:
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kwtools['exc'].append(pat)
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if kwtools['inc']:
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def kwdispatch_parse(orig, ui, args):
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'''Monkeypatch dispatch._parse to obtain running hg command.'''
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cmd, func, args, options, cmdoptions = orig(ui, args)
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kwtools['hgcmd'] = cmd
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return cmd, func, args, options, cmdoptions
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extensions.wrapfunction(dispatch, '_parse', kwdispatch_parse)
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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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Monkeypatches patch and webcommands.'''
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try:
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if (not repo.local() or not kwtools['inc']
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or kwtools['hgcmd'] in nokwcommands.split()
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or '.hg' in util.splitpath(repo.root)
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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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kwtools['templater'] = kwt = kwtemplater(ui, repo)
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class kwrepo(repo.__class__):
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def file(self, f):
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if f[0] == '/':
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f = f[1:]
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return kwfilelog(self.sopener, kwt, f)
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def wread(self, filename):
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data = super(kwrepo, self).wread(filename)
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return kwt.wread(filename, data)
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def commit(self, *args, **opts):
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# use custom commitctx for user commands
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# other extensions can still wrap repo.commitctx directly
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self.commitctx = self.kwcommitctx
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try:
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return super(kwrepo, self).commit(*args, **opts)
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finally:
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del self.commitctx
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def kwcommitctx(self, ctx, error=False):
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wlock = lock = 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 hooks
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p1, p2 = ctx.p1(), ctx.p2()
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xp1, xp2 = p1.hex(), p2 and p2.hex() or ''
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n = super(kwrepo, self).commitctx(ctx, error)
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kwt.overwrite(n, True, None)
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if commithooks:
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for name, cmd in commithooks.iteritems():
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ui.setconfig('hooks', name, cmd)
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self.hook('commit', node=n, parent1=xp1, parent2=xp2)
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return n
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finally:
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release(lock, wlock)
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# monkeypatches
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def kwpatchfile_init(orig, self, ui, fname, opener,
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missing=False, eol=None):
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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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orig(self, ui, fname, opener, missing, eol)
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# shrink keywords read from working dir
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self.lines = kwt.shrinklines(self.fname, self.lines)
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def kw_diff(orig, repo, node1=None, node2=None, match=None, changes=None,
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opts=None):
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'''Monkeypatch patch.diff to avoid expansion except when
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comparing against working dir.'''
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if node2 is not None:
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kwt.match = util.never
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elif node1 is not None and node1 != repo['.'].node():
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kwt.restrict = True
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return orig(repo, node1, node2, match, changes, opts)
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def kwweb_skip(orig, web, req, tmpl):
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'''Wraps webcommands.x turning off keyword expansion.'''
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kwt.match = util.never
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return orig(web, req, tmpl)
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repo.__class__ = kwrepo
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extensions.wrapfunction(patch.patchfile, '__init__', kwpatchfile_init)
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extensions.wrapfunction(patch, 'diff', kw_diff)
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for c in 'annotate changeset rev filediff diff'.split():
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extensions.wrapfunction(webcommands, c, kwweb_skip)
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cmdtable = {
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'kwdemo':
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(demo,
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[('d', 'default', None, _('show default keyword template maps')),
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('f', 'rcfile', [], _('read maps from rcfile'))],
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_('hg kwdemo [-d] [-f RCFILE] [TEMPLATEMAP]...')),
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'kwexpand': (expand, commands.walkopts,
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_('hg kwexpand [OPTION]... [FILE]...')),
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'kwfiles':
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(files,
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[('a', 'all', None, _('show keyword status flags of all files')),
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('i', 'ignore', None, _('show files excluded from expansion')),
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('u', 'untracked', None, _('additionally show untracked files')),
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] + commands.walkopts,
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_('hg kwfiles [OPTION]... [FILE]...')),
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'kwshrink': (shrink, commands.walkopts,
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_('hg kwshrink [OPTION]... [FILE]...')),
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}
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