hgkw/keyword.py
author Christian Ebert <blacktrash@gmx.net>
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child 327 06f3c6b3dd93
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# keyword.py - $Keyword$ expansion for Mercurial
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#
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# Copyright 2007 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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#   keyword = /full/path/to/hgkw/keyword.py
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#   # or, if script in canonical hgext folder:
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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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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, fancyopts, filelog
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from mercurial import patch, localrepo, revlog, templater, util
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from mercurial.node import *
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from mercurial.i18n import _
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import re, shutil, sys, tempfile, time
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commands.optionalrepo += ' kwdemo'
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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 = None
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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):
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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.node = 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)(: [^$\n\r]*? )??\$' % '|'.join(escaped)
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        self.re_kw = re.compile(kwpat)
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        templater.common_filters['utcdate'] = utcdate
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        self.ct = cmdutil.changeset_templater(self.ui, self.repo,
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                                              False, '', False)
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    def substitute(self, node, data, subfunc):
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        '''Obtains node if missing, and calls given substitution function.'''
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        if not self.node:
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            c = context.filectx(self.repo, self.path, fileid=node)
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            self.node = c.node()
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        def kwsub(mobj):
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            '''Substitutes keyword using corresponding template.'''
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            kw = mobj.group(1)
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            self.ct.use_template(self.templates[kw])
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            self.ui.pushbuffer()
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            self.ct.show(changenode=self.node,
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                         root=self.repo.root, file=self.path)
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            return '$%s: %s $' % (kw, templater.firstline(self.ui.popbuffer()))
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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 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, indicates
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        to caller whether to act on file containing data.
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        Keywords in data are expanded, if templater was initialized.'''
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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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   161
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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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   167
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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
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        (only called from kwtemplater.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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   182
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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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   187
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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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   192
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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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# store original patch.patchfile.__init__
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_patchfile_init = patch.patchfile.__init__
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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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   215
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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 files is None:
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        notify = ui.debug # commit
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        files = [f for f in ctx.files() if mf.has_key(f)]
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   236
    else:
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        notify = ui.note  # kwexpand/kwshrink
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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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        _kwtemplater.node = node or ctx.node()
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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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260
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    Show current, custom, or default keyword template maps
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    and their expansion.
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260
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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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260
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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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266
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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.items():
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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.items())
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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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    verbose = ui.verbose
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    ui.quiet = not 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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   346
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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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   356
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def files(ui, repo, *pats, **opts):
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   358
    '''print files currently configured for keyword expansion
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   359
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    Crosscheck which files in working directory are potential targets for
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    keyword expansion.
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   362
    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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    if opts.get('untracked'):
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   367
        files = modified + added + unknown + clean
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    else:
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        files = modified + added + clean
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    files.sort()
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    kwfiles = [f for f in files if _iskwfile(f, repo._link)]
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    cwd = pats and repo.getcwd() or ''
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   373
    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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   379
            ui.write(format % repo.pathto(f, cwd))
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   380
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def shrink(ui, repo, *pats, **opts):
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   382
    '''revert expanded keywords in working directory
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   383
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   384
    Run before changing/disabling active keywords
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   385
    or if you experience problems with "hg import" or "hg merge".
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   386
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diff changeset
   387
    kwshrink refuses to run if given files contain local changes.
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   388
    '''
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   389
    # 3rd argument sets expansion to False
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diff changeset
   390
    _kwfwrite(ui, repo, False, *pats, **opts)
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diff changeset
   391
42
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   392
33
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   393
def reposetup(ui, repo):
157
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   394
    '''Sets up repo as kwrepo for keyword substitution.
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diff changeset
   395
    Overrides file method to return kwfilelog instead of filelog
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   396
    if file matches user configuration.
144
19b3d1de3db0 Move kwfilelog out of reposetup; only use kwfilelog if file matches
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   397
    Wraps commit to overwrite configured files with updated
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   398
    keyword substitutions.
157
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diff changeset
   399
    This is done for local repos only, and only if there are
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diff changeset
   400
    files configured at all for keyword substitution.'''
64
4cd7b993c5f8 Imports specific to functions
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diff changeset
   401
318
12d26936a315 Make command line check even more private
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   402
    def kwbailout():
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   403
        '''Obtains command via simplified cmdline parsing,
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   404
        returns True if keyword expansion not needed.'''
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   405
        nokwcommands = ('add', 'addremove', 'bundle', 'clone', 'copy',
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   406
                        'export', 'grep', 'identify', 'incoming', 'init',
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diff changeset
   407
                        'outgoing', 'push', 'remove', 'rename', 'rollback',
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   408
                        'convert')
292
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diff changeset
   409
        args = fancyopts.fancyopts(sys.argv[1:], commands.globalopts, {})
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   410
        if args:
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   411
            aliases, i = cmdutil.findcmd(ui, args[0], commands.table)
318
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   412
            return aliases[0] in nokwcommands
292
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   413
318
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   414
    if not repo.local() or kwbailout():
33
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parents:
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   415
        return
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   416
261
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diff changeset
   417
    inc, exc = [], ['.hgtags']
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diff changeset
   418
    for pat, opt in ui.configitems('keyword'):
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diff changeset
   419
        if opt != 'ignore':
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diff changeset
   420
            inc.append(pat)
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diff changeset
   421
        else:
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diff changeset
   422
            exc.append(pat)
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   423
    if not inc:
157
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diff changeset
   424
        return
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diff changeset
   425
307
32061d23db14 Refactor to initialize kwtemplater only once during reposetup
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diff changeset
   426
    global _kwtemplater
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diff changeset
   427
    _kwtemplater = kwtemplater(ui, repo, inc, exc)
261
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diff changeset
   428
33
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   429
    class kwrepo(repo.__class__):
307
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diff changeset
   430
        def file(self, f, kwmatch=False):
33
ebb39c6a1476 Add original keyword extension by Thomas Arendsen Hain
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parents:
diff changeset
   431
            if f[0] == '/':
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   432
                f = f[1:]
310
574128f982a2 Reintroduce _iskwfile with link method as argument
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diff changeset
   433
            if kwmatch or _kwtemplater.matcher(f):
314
d9f84b36de26 Do not pass global _kwtemplater around in arguments
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diff changeset
   434
                return kwfilelog(self.sopener, f)
204
2d089b691b31 Add grep, init to nokwcommands; make variables, getcmd local
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parents: 203
diff changeset
   435
            return filelog.filelog(self.sopener, f)
78
474b415433a1 Unexpanded storage hopefully covered now by adding kwfilelog.add (again!)
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parents: 77
diff changeset
   436
290
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diff changeset
   437
        def commit(self, files=None, text='', user=None, date=None,
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diff changeset
   438
                   match=util.always, force=False, force_editor=False,
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diff changeset
   439
                   p1=None, p2=None, extra={}):
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diff changeset
   440
            wlock = lock = None
297
9e29992343a1 Rearrange commit hook hack
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diff changeset
   441
            _p1 = _p2 = None
230
9fe9a9839387 Move backwards compatible commit fork into private kwrepo function
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parents: 229
diff changeset
   442
            try:
290
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diff changeset
   443
                wlock = self.wlock()
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   444
                lock = self.lock()
293
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diff changeset
   445
                # store and postpone commit hooks
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diff changeset
   446
                commithooks = []
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diff changeset
   447
                for name, cmd in ui.configitems('hooks'):
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   448
                    if name.split('.', 1)[0] == 'commit':
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   449
                        commithooks.append((name, cmd))
304
815dc4a04296 Do not run commit hooks if there is no node
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   450
                        ui.setconfig('hooks', name, None)
293
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diff changeset
   451
                if commithooks:
296
869b16d09eec Commit hook handling entirely into if-condition
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diff changeset
   452
                    # store parents for commit hook environment
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diff changeset
   453
                    if p1 is None:
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diff changeset
   454
                        _p1, _p2 = repo.dirstate.parents()
293
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diff changeset
   455
                    else:
296
869b16d09eec Commit hook handling entirely into if-condition
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diff changeset
   456
                        _p1, _p2 = p1, p2 or nullid
297
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diff changeset
   457
                    _p1 = hex(_p1)
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diff changeset
   458
                    if _p2 == nullid:
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diff changeset
   459
                        _p2 = ''
9e29992343a1 Rearrange commit hook hack
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diff changeset
   460
                    else:
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diff changeset
   461
                        _p2 = hex(_p2)
293
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diff changeset
   462
290
b05795ad5632 Make keyword against current Mercurial available as standalone extension
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diff changeset
   463
                node = super(kwrepo,
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diff changeset
   464
                             self).commit(files=files, text=text, user=user,
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diff changeset
   465
                                          date=date, match=match, force=force,
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diff changeset
   466
                                          force_editor=force_editor,
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diff changeset
   467
                                          p1=p1, p2=p2, extra=extra)
304
815dc4a04296 Do not run commit hooks if there is no node
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parents: 301
diff changeset
   468
815dc4a04296 Do not run commit hooks if there is no node
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parents: 301
diff changeset
   469
                # restore commit hooks
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parents: 301
diff changeset
   470
                for name, cmd in commithooks:
815dc4a04296 Do not run commit hooks if there is no node
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parents: 301
diff changeset
   471
                    ui.setconfig('hooks', name, cmd)
206
8d16b70359da Treat wlock the recommended way
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parents: 205
diff changeset
   472
                if node is not None:
314
d9f84b36de26 Do not pass global _kwtemplater around in arguments
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parents: 310
diff changeset
   473
                    _overwrite(ui, self, node=node)
304
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parents: 301
diff changeset
   474
                    repo.hook('commit', node=node, parent1=_p1, parent2=_p2)
145
1c2cefa97b96 Wrap entire commit in wlock
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parents: 144
diff changeset
   475
                return node
143
3485b0ef99c4 Add wlock during overwrite
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parents: 142
diff changeset
   476
            finally:
290
b05795ad5632 Make keyword against current Mercurial available as standalone extension
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parents: 288
diff changeset
   477
                del wlock, lock
129
15e8cd7f5295 Wrap commit instead of calling pretxncommit hook
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parents: 128
diff changeset
   478
157
64dce6787d82 Incorporate changes in self_initializing_hook branch
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parents: 98
diff changeset
   479
    repo.__class__ = kwrepo
315
c1ec4ffd1279 Avoid import and merge conflicts caused by expanded keywords
Christian Ebert <blacktrash@gmx.net>
parents: 314
diff changeset
   480
    patch.patchfile.__init__ = _kwpatchfile_init
42
ba000e29ecf3 Implement near CVS compability with more than one keyword
Christian Ebert <blacktrash@gmx.net>
parents: 41
diff changeset
   481
81
fd5d3a974ea7 Implement self initializing pretxncommit hook
Christian Ebert <blacktrash@gmx.net>
parents: 80
diff changeset
   482
178
4a27c306c6a2 Add kwdemo command as online config help
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parents: 177
diff changeset
   483
cmdtable = {
4a27c306c6a2 Add kwdemo command as online config help
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parents: 177
diff changeset
   484
    'kwdemo':
181
8019554adbb2 kwdemo is demo internally; rearrange code
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parents: 180
diff changeset
   485
        (demo,
187
a01a0392f648 kwdemo accepts maps as arguments, reads from optional rcfile
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parents: 186
diff changeset
   486
         [('d', 'default', None, _('show default keyword template maps')),
283
071bfbd482b4 Respect Mercurial conventions in kwdemo help
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parents: 282
diff changeset
   487
          ('f', 'rcfile', [], _('read maps from rcfile'))],
071bfbd482b4 Respect Mercurial conventions in kwdemo help
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parents: 282
diff changeset
   488
         _('hg kwdemo [-d] [-f RCFILE] [TEMPLATEMAP]...')),
285
0aa02d36b3b1 Arrange commands and cmdtable in alphabetical order
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parents: 284
diff changeset
   489
    'kwexpand': (expand, commands.walkopts,
0aa02d36b3b1 Arrange commands and cmdtable in alphabetical order
Christian Ebert <blacktrash@gmx.net>
parents: 284
diff changeset
   490
                 _('hg kwexpand [OPTION]... [FILE]...')),
264
7c637046c0e2 walkopts for kwexpand, kwshrink, kwfiles commands
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parents: 263
diff changeset
   491
    'kwfiles':
7c637046c0e2 walkopts for kwexpand, kwshrink, kwfiles commands
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parents: 263
diff changeset
   492
        (files,
270
371ce7fe5f13 kwfiles: change option "ignored" to "ignore", add option "untracked"
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parents: 269
diff changeset
   493
         [('a', 'all', None, _('show keyword status flags of all files')),
371ce7fe5f13 kwfiles: change option "ignored" to "ignore", add option "untracked"
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parents: 269
diff changeset
   494
          ('i', 'ignore', None, _('show files excluded from expansion')),
371ce7fe5f13 kwfiles: change option "ignored" to "ignore", add option "untracked"
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parents: 269
diff changeset
   495
          ('u', 'untracked', None, _('additionally show untracked files')),
264
7c637046c0e2 walkopts for kwexpand, kwshrink, kwfiles commands
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parents: 263
diff changeset
   496
         ] + commands.walkopts,
7c637046c0e2 walkopts for kwexpand, kwshrink, kwfiles commands
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parents: 263
diff changeset
   497
         _('hg kwfiles [OPTION]... [FILE]...')),
7c637046c0e2 walkopts for kwexpand, kwshrink, kwfiles commands
Christian Ebert <blacktrash@gmx.net>
parents: 263
diff changeset
   498
    'kwshrink': (shrink, commands.walkopts,
7c637046c0e2 walkopts for kwexpand, kwshrink, kwfiles commands
Christian Ebert <blacktrash@gmx.net>
parents: 263
diff changeset
   499
                 _('hg kwshrink [OPTION]... [FILE]...')),
178
4a27c306c6a2 Add kwdemo command as online config help
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parents: 177
diff changeset
   500
}