# keyword.py - $Keyword$ expansion for Mercurial # # Copyright 2007-2010 Christian Ebert # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. # # $Id$ # # Keyword expansion hack against the grain of a DSCM # # There are many good reasons why this is not needed in a distributed # SCM, still it may be useful in very small projects based on single # files (like LaTeX packages), that are mostly addressed to an # audience not running a version control system. # # For in-depth discussion refer to # . # # Keyword expansion is based on Mercurial's changeset template mappings. # # Binary files are not touched. # # Files to act upon/ignore are specified in the [keyword] section. # Customized keyword template mappings in the [keywordmaps] section. # # Run "hg help keyword" and "hg kwdemo" to get info on configuration. '''expand keywords in tracked files This extension expands RCS/CVS-like or self-customized $Keywords$ in tracked text files selected by your configuration. Keywords are only expanded in local repositories and not stored in the change history. The mechanism can be regarded as a convenience for the current user or for archive distribution. Keywords expand to the changeset data pertaining to the latest change relative to the working directory parent of each file. Configuration is done in the [keyword], [keywordset] and [keywordmaps] sections of hgrc files. Example:: [keyword] # expand keywords in every python file except those matching "x*" **.py = x* = ignore [keywordset] # prefer svn- over cvs-like default keywordmaps svn = True .. note:: The more specific you are in your filename patterns the less you lose speed in huge repositories. For [keywordmaps] template mapping and expansion demonstration and control run :hg:`kwdemo`. See :hg:`help templates` for a list of available templates and filters. Three additional date template filters are provided: :``utcdate``: "2006/09/18 15:13:13" :``svnutcdate``: "2006-09-18 15:13:13Z" :``svnisodate``: "2006-09-18 08:13:13 -700 (Mon, 18 Sep 2006)" The default template mappings (view with :hg:`kwdemo -d`) can be replaced with customized keywords and templates. Again, run :hg:`kwdemo` to control the results of your configuration changes. Before changing/disabling active keywords, you must run :hg:`kwshrink` to avoid storing expanded keywords in the change history. To force expansion after enabling it, or a configuration change, run :hg:`kwexpand`. Expansions spanning more than one line and incremental expansions, like CVS' $Log$, are not supported. A keyword template map "Log = {desc}" expands to the first line of the changeset description. ''' from mercurial import commands, context, cmdutil, dispatch, filelog, extensions from mercurial import localrepo, match, patch, templatefilters, templater, util from mercurial import scmutil from mercurial.hgweb import webcommands from mercurial.i18n import _ import os, re, shutil, tempfile commands.optionalrepo += ' kwdemo' cmdtable = {} command = cmdutil.command(cmdtable) # hg commands that do not act on keywords nokwcommands = ('add addremove annotate bundle export grep incoming init log' ' outgoing push tip verify convert email glog') # hg commands that trigger expansion only when writing to working dir, # not when reading filelog, and unexpand when reading from working dir restricted = 'merge kwexpand kwshrink record qrecord resolve transplant' # names of extensions using dorecord recordextensions = 'record' colortable = { 'kwfiles.enabled': 'green bold', 'kwfiles.deleted': 'cyan bold underline', 'kwfiles.enabledunknown': 'green', 'kwfiles.ignored': 'bold', 'kwfiles.ignoredunknown': 'none' } # date like in cvs' $Date def utcdate(text): ''':utcdate: Date. Returns a UTC-date in this format: "2009/08/18 11:00:13". ''' return util.datestr((text[0], 0), '%Y/%m/%d %H:%M:%S') # date like in svn's $Date def svnisodate(text): ''':svnisodate: Date. Returns a date in this format: "2009-08-18 13:00:13 +0200 (Tue, 18 Aug 2009)". ''' return util.datestr(text, '%Y-%m-%d %H:%M:%S %1%2 (%a, %d %b %Y)') # date like in svn's $Id def svnutcdate(text): ''':svnutcdate: Date. Returns a UTC-date in this format: "2009-08-18 11:00:13Z". ''' return util.datestr((text[0], 0), '%Y-%m-%d %H:%M:%SZ') templatefilters.filters.update({'utcdate': utcdate, 'svnisodate': svnisodate, 'svnutcdate': svnutcdate}) # make keyword tools accessible kwtools = {'templater': None, 'hgcmd': ''} def _defaultkwmaps(ui): '''Returns default keywordmaps according to keywordset configuration.''' templates = { 'Revision': '{node|short}', 'Author': '{author|user}', } kwsets = ({ 'Date': '{date|utcdate}', 'RCSfile': '{file|basename},v', 'RCSFile': '{file|basename},v', # kept for backwards compatibility # with hg-keyword 'Source': '{root}/{file},v', 'Id': '{file|basename},v {node|short} {date|utcdate} {author|user}', 'Header': '{root}/{file},v {node|short} {date|utcdate} {author|user}', }, { 'Date': '{date|svnisodate}', 'Id': '{file|basename},v {node|short} {date|svnutcdate} {author|user}', 'LastChangedRevision': '{node|short}', 'LastChangedBy': '{author|user}', 'LastChangedDate': '{date|svnisodate}', }) templates.update(kwsets[ui.configbool('keywordset', 'svn')]) return templates def _shrinktext(text, subfunc): '''Helper for keyword expansion removal in text. Depending on subfunc also returns number of substitutions.''' return subfunc(r'$\1$', text) def _preselect(wstatus, changed): '''Retrieves modfied and added files from a working directory state and returns the subset of each contained in given changed files retrieved from a change context.''' modified, added = wstatus[:2] modified = [f for f in modified if f in changed] added = [f for f in added if f in changed] return modified, added class kwtemplater(object): ''' Sets up keyword templates, corresponding keyword regex, and provides keyword substitution functions. ''' def __init__(self, ui, repo, inc, exc): self.ui = ui self.repo = repo self.match = match.match(repo.root, '', [], inc, exc) self.restrict = kwtools['hgcmd'] in restricted.split() self.record = False kwmaps = self.ui.configitems('keywordmaps') if kwmaps: # override default templates self.templates = dict((k, templater.parsestring(v, False)) for k, v in kwmaps) else: self.templates = _defaultkwmaps(self.ui) @util.propertycache def escape(self): '''Returns bar-separated and escaped keywords.''' return '|'.join(map(re.escape, self.templates.keys())) @util.propertycache def rekw(self): '''Returns regex for unexpanded keywords.''' return re.compile(r'\$(%s)\$' % self.escape) @util.propertycache def rekwexp(self): '''Returns regex for expanded keywords.''' return re.compile(r'\$(%s): [^$\n\r]*? \$' % self.escape) def substitute(self, data, path, ctx, subfunc): '''Replaces keywords in data with expanded template.''' def kwsub(mobj): kw = mobj.group(1) ct = cmdutil.changeset_templater(self.ui, self.repo, False, None, '', False) ct.use_template(self.templates[kw]) self.ui.pushbuffer() ct.show(ctx, root=self.repo.root, file=path) ekw = templatefilters.firstline(self.ui.popbuffer()) return '$%s: %s $' % (kw, ekw) return subfunc(kwsub, data) def linkctx(self, path, fileid): '''Similar to filelog.linkrev, but returns a changectx.''' return self.repo.filectx(path, fileid=fileid).changectx() def expand(self, path, node, data): '''Returns data with keywords expanded.''' if not self.restrict and self.match(path) and not util.binary(data): ctx = self.linkctx(path, node) return self.substitute(data, path, ctx, self.rekw.sub) return data def iskwfile(self, cand, ctx): '''Returns subset of candidates which are configured for keyword expansion are not symbolic links.''' return [f for f in cand if self.match(f) and not 'l' in ctx.flags(f)] def overwrite(self, ctx, candidates, lookup, expand, rekw=False): '''Overwrites selected files expanding/shrinking keywords.''' if self.restrict or lookup or self.record: # exclude kw_copy candidates = self.iskwfile(candidates, ctx) if not candidates: return kwcmd = self.restrict and lookup # kwexpand/kwshrink if self.restrict or expand and lookup: mf = ctx.manifest() lctx = ctx re_kw = (self.restrict or rekw) and self.rekw or self.rekwexp msg = (expand and _('overwriting %s expanding keywords\n') or _('overwriting %s shrinking keywords\n')) for f in candidates: if self.restrict: data = self.repo.file(f).read(mf[f]) else: data = self.repo.wread(f) if util.binary(data): continue if expand: if lookup: lctx = self.linkctx(f, mf[f]) data, found = self.substitute(data, f, lctx, re_kw.subn) elif self.restrict: found = re_kw.search(data) else: data, found = _shrinktext(data, re_kw.subn) if found: self.ui.note(msg % f) self.repo.wwrite(f, data, ctx.flags(f)) if kwcmd: self.repo.dirstate.normal(f) elif self.record: self.repo.dirstate.normallookup(f) def shrink(self, fname, text): '''Returns text with all keyword substitutions removed.''' if self.match(fname) and not util.binary(text): return _shrinktext(text, self.rekwexp.sub) return text def shrinklines(self, fname, lines): '''Returns lines with keyword substitutions removed.''' if self.match(fname): text = ''.join(lines) if not util.binary(text): return _shrinktext(text, self.rekwexp.sub).splitlines(True) return lines def wread(self, fname, data): '''If in restricted mode returns data read from wdir with keyword substitutions removed.''' return self.restrict and self.shrink(fname, data) or data class kwfilelog(filelog.filelog): ''' Subclass of filelog to hook into its read, add, cmp methods. Keywords are "stored" unexpanded, and processed on reading. ''' def __init__(self, opener, kwt, path): super(kwfilelog, self).__init__(opener, path) self.kwt = kwt self.path = path def read(self, node): '''Expands keywords when reading filelog.''' data = super(kwfilelog, self).read(node) if self.renamed(node): return data return self.kwt.expand(self.path, node, data) def add(self, text, meta, tr, link, p1=None, p2=None): '''Removes keyword substitutions when adding to filelog.''' text = self.kwt.shrink(self.path, text) return super(kwfilelog, self).add(text, meta, tr, link, p1, p2) def cmp(self, node, text): '''Removes keyword substitutions for comparison.''' text = self.kwt.shrink(self.path, text) return super(kwfilelog, self).cmp(node, text) def _status(ui, repo, kwt, *pats, **opts): '''Bails out if [keyword] configuration is not active. Returns status of working directory.''' if kwt: return repo.status(match=scmutil.match(repo, pats, opts), clean=True, unknown=opts.get('unknown') or opts.get('all')) if ui.configitems('keyword'): raise util.Abort(_('[keyword] patterns cannot match')) raise util.Abort(_('no [keyword] patterns configured')) def _kwfwrite(ui, repo, expand, *pats, **opts): '''Selects files and passes them to kwtemplater.overwrite.''' wctx = repo[None] if len(wctx.parents()) > 1: raise util.Abort(_('outstanding uncommitted merge')) kwt = kwtools['templater'] wlock = repo.wlock() try: status = _status(ui, repo, kwt, *pats, **opts) modified, added, removed, deleted, unknown, ignored, clean = status if modified or added or removed or deleted: raise util.Abort(_('outstanding uncommitted changes')) kwt.overwrite(wctx, clean, True, expand) finally: wlock.release() @command('kwdemo', [('d', 'default', None, _('show default keyword template maps')), ('f', 'rcfile', '', _('read maps from rcfile'), _('FILE'))], _('hg kwdemo [-d] [-f RCFILE] [TEMPLATEMAP]...')) def demo(ui, repo, *args, **opts): '''print [keywordmaps] configuration and an expansion example Show current, custom, or default keyword template maps and their expansions. Extend the current configuration by specifying maps as arguments and using -f/--rcfile to source an external hgrc file. Use -d/--default to disable current configuration. See :hg:`help templates` for information on templates and filters. ''' def demoitems(section, items): ui.write('[%s]\n' % section) for k, v in sorted(items): ui.write('%s = %s\n' % (k, v)) fn = 'demo.txt' tmpdir = tempfile.mkdtemp('', 'kwdemo.') ui.note(_('creating temporary repository at %s\n') % tmpdir) repo = localrepo.localrepository(ui, tmpdir, True) ui.setconfig('keyword', fn, '') svn = ui.configbool('keywordset', 'svn') # explicitly set keywordset for demo output ui.setconfig('keywordset', 'svn', svn) uikwmaps = ui.configitems('keywordmaps') if args or opts.get('rcfile'): ui.status(_('\n\tconfiguration using custom keyword template maps\n')) if uikwmaps: ui.status(_('\textending current template maps\n')) if opts.get('default') or not uikwmaps: if svn: ui.status(_('\toverriding default svn keywordset\n')) else: ui.status(_('\toverriding default cvs keywordset\n')) if opts.get('rcfile'): ui.readconfig(opts.get('rcfile')) if args: # simulate hgrc parsing rcmaps = ['[keywordmaps]\n'] + [a + '\n' for a in args] fp = repo.opener('hgrc', 'w') fp.writelines(rcmaps) fp.close() ui.readconfig(repo.join('hgrc')) kwmaps = dict(ui.configitems('keywordmaps')) elif opts.get('default'): if svn: ui.status(_('\n\tconfiguration using default svn keywordset\n')) else: ui.status(_('\n\tconfiguration using default cvs keywordset\n')) kwmaps = _defaultkwmaps(ui) if uikwmaps: ui.status(_('\tdisabling current template maps\n')) for k, v in kwmaps.iteritems(): ui.setconfig('keywordmaps', k, v) else: ui.status(_('\n\tconfiguration using current keyword template maps\n')) kwmaps = dict(uikwmaps) or _defaultkwmaps(ui) uisetup(ui) reposetup(ui, repo) ui.write('[extensions]\nkeyword =\n') demoitems('keyword', ui.configitems('keyword')) demoitems('keywordset', ui.configitems('keywordset')) demoitems('keywordmaps', kwmaps.iteritems()) keywords = '$' + '$\n$'.join(sorted(kwmaps.keys())) + '$\n' repo.wopener.write(fn, keywords) repo[None].add([fn]) ui.note(_('\nkeywords written to %s:\n') % fn) ui.note(keywords) repo.dirstate.setbranch('demobranch') for name, cmd in ui.configitems('hooks'): if name.split('.', 1)[0].find('commit') > -1: repo.ui.setconfig('hooks', name, '') msg = _('hg keyword configuration and expansion example') ui.note("hg ci -m '%s'\n" % msg) repo.commit(text=msg) ui.status(_('\n\tkeywords expanded\n')) ui.write(repo.wread(fn)) shutil.rmtree(tmpdir, ignore_errors=True) @command('kwexpand', commands.walkopts, _('hg kwexpand [OPTION]... [FILE]...')) def expand(ui, repo, *pats, **opts): '''expand keywords in the working directory Run after (re)enabling keyword expansion. kwexpand refuses to run if given files contain local changes. ''' # 3rd argument sets expansion to True _kwfwrite(ui, repo, True, *pats, **opts) @command('kwfiles', [('A', 'all', None, _('show keyword status flags of all files')), ('i', 'ignore', None, _('show files excluded from expansion')), ('u', 'unknown', None, _('only show unknown (not tracked) files')), ] + commands.walkopts, _('hg kwfiles [OPTION]... [FILE]...')) def files(ui, repo, *pats, **opts): '''show files configured for keyword expansion List which files in the working directory are matched by the [keyword] configuration patterns. Useful to prevent inadvertent keyword expansion and to speed up execution by including only files that are actual candidates for expansion. See :hg:`help keyword` on how to construct patterns both for inclusion and exclusion of files. With -A/--all and -v/--verbose the codes used to show the status of files are:: K = keyword expansion candidate k = keyword expansion candidate (not tracked) I = ignored i = ignored (not tracked) ''' kwt = kwtools['templater'] status = _status(ui, repo, kwt, *pats, **opts) cwd = pats and repo.getcwd() or '' modified, added, removed, deleted, unknown, ignored, clean = status files = [] if not opts.get('unknown') or opts.get('all'): files = sorted(modified + added + clean) wctx = repo[None] kwfiles = kwt.iskwfile(files, wctx) kwdeleted = kwt.iskwfile(deleted, wctx) kwunknown = kwt.iskwfile(unknown, wctx) if not opts.get('ignore') or opts.get('all'): showfiles = kwfiles, kwdeleted, kwunknown else: showfiles = [], [], [] if opts.get('all') or opts.get('ignore'): showfiles += ([f for f in files if f not in kwfiles], [f for f in unknown if f not in kwunknown]) kwlabels = 'enabled deleted enabledunknown ignored ignoredunknown'.split() kwstates = zip('K!kIi', showfiles, kwlabels) for char, filenames, kwstate in kwstates: fmt = (opts.get('all') or ui.verbose) and '%s %%s\n' % char or '%s\n' for f in filenames: ui.write(fmt % repo.pathto(f, cwd), label='kwfiles.' + kwstate) @command('kwshrink', commands.walkopts, _('hg kwshrink [OPTION]... [FILE]...')) def shrink(ui, repo, *pats, **opts): '''revert expanded keywords in the working directory Must be run before changing/disabling active keywords. kwshrink refuses to run if given files contain local changes. ''' # 3rd argument sets expansion to False _kwfwrite(ui, repo, False, *pats, **opts) def uisetup(ui): ''' Monkeypatches dispatch._parse to retrieve user command.''' def kwdispatch_parse(orig, ui, args): '''Monkeypatch dispatch._parse to obtain running hg command.''' cmd, func, args, options, cmdoptions = orig(ui, args) kwtools['hgcmd'] = cmd return cmd, func, args, options, cmdoptions extensions.wrapfunction(dispatch, '_parse', kwdispatch_parse) def reposetup(ui, repo): '''Sets up repo as kwrepo for keyword substitution. Overrides file method to return kwfilelog instead of filelog if file matches user configuration. Wraps commit to overwrite configured files with updated keyword substitutions. Monkeypatches patch and webcommands.''' try: if (not repo.local() or kwtools['hgcmd'] in nokwcommands.split() or '.hg' in util.splitpath(repo.root) or repo._url.startswith('bundle:')): return except AttributeError: pass inc, exc = [], ['.hg*'] for pat, opt in ui.configitems('keyword'): if opt != 'ignore': inc.append(pat) else: exc.append(pat) if not inc: return kwtools['templater'] = kwt = kwtemplater(ui, repo, inc, exc) class kwrepo(repo.__class__): def file(self, f): if f[0] == '/': f = f[1:] return kwfilelog(self.sopener, kwt, f) def wread(self, filename): data = super(kwrepo, self).wread(filename) return kwt.wread(filename, data) def commit(self, *args, **opts): # use custom commitctx for user commands # other extensions can still wrap repo.commitctx directly self.commitctx = self.kwcommitctx try: return super(kwrepo, self).commit(*args, **opts) finally: del self.commitctx def kwcommitctx(self, ctx, error=False): n = super(kwrepo, self).commitctx(ctx, error) # no lock needed, only called from repo.commit() which already locks if not kwt.record: restrict = kwt.restrict kwt.restrict = True kwt.overwrite(self[n], sorted(ctx.added() + ctx.modified()), False, True) kwt.restrict = restrict return n def rollback(self, dryrun=False): wlock = self.wlock() try: if not dryrun: changed = self['.'].files() ret = super(kwrepo, self).rollback(dryrun) if not dryrun: ctx = self['.'] modified, added = _preselect(self[None].status(), changed) kwt.overwrite(ctx, modified, True, True) kwt.overwrite(ctx, added, True, False) return ret finally: wlock.release() # monkeypatches def kwpatchfile_init(orig, self, ui, fname, backend, mode, create, remove, missing=False, eolmode=None): '''Monkeypatch/wrap patch.patchfile.__init__ to avoid rejects or conflicts due to expanded keywords in working dir.''' orig(self, ui, fname, backend, mode, create, remove, missing, eolmode) # shrink keywords read from working dir self.lines = kwt.shrinklines(self.fname, self.lines) def kw_diff(orig, repo, node1=None, node2=None, match=None, changes=None, opts=None, prefix=''): '''Monkeypatch patch.diff to avoid expansion.''' kwt.restrict = True return orig(repo, node1, node2, match, changes, opts, prefix) def kwweb_skip(orig, web, req, tmpl): '''Wraps webcommands.x turning off keyword expansion.''' kwt.match = util.never return orig(web, req, tmpl) def kw_copy(orig, ui, repo, pats, opts, rename=False): '''Wraps cmdutil.copy so that copy/rename destinations do not contain expanded keywords. Note that the source of a regular file destination may also be a symlink: hg cp sym x -> x is symlink cp sym x; hg cp -A sym x -> x is file (maybe expanded keywords) For the latter we have to follow the symlink to find out whether its target is configured for expansion and we therefore must unexpand the keywords in the destination.''' orig(ui, repo, pats, opts, rename) if opts.get('dry_run'): return wctx = repo[None] cwd = repo.getcwd() def haskwsource(dest): '''Returns true if dest is a regular file and configured for expansion or a symlink which points to a file configured for expansion. ''' source = repo.dirstate.copied(dest) if 'l' in wctx.flags(source): source = scmutil.canonpath(repo.root, cwd, os.path.realpath(source)) return kwt.match(source) candidates = [f for f in repo.dirstate.copies() if not 'l' in wctx.flags(f) and haskwsource(f)] kwt.overwrite(wctx, candidates, False, False) def kw_dorecord(orig, ui, repo, commitfunc, *pats, **opts): '''Wraps record.dorecord expanding keywords after recording.''' wlock = repo.wlock() try: # record returns 0 even when nothing has changed # therefore compare nodes before and after kwt.record = True ctx = repo['.'] wstatus = repo[None].status() ret = orig(ui, repo, commitfunc, *pats, **opts) recctx = repo['.'] if ctx != recctx: modified, added = _preselect(wstatus, recctx.files()) kwt.restrict = False kwt.overwrite(recctx, modified, False, True) kwt.overwrite(recctx, added, False, True, True) kwt.restrict = True return ret finally: wlock.release() def kwfilectx_cmp(orig, self, fctx): # keyword affects data size, comparing wdir and filelog size does # not make sense if (fctx._filerev is None and (self._repo._encodefilterpats or kwt.match(fctx.path()) and not 'l' in fctx.flags()) or self.size() == fctx.size()): return self._filelog.cmp(self._filenode, fctx.data()) return True extensions.wrapfunction(context.filectx, 'cmp', kwfilectx_cmp) extensions.wrapfunction(patch.patchfile, '__init__', kwpatchfile_init) extensions.wrapfunction(patch, 'diff', kw_diff) extensions.wrapfunction(cmdutil, 'copy', kw_copy) for c in 'annotate changeset rev filediff diff'.split(): extensions.wrapfunction(webcommands, c, kwweb_skip) for name in recordextensions.split(): try: record = extensions.find(name) extensions.wrapfunction(record, 'dorecord', kw_dorecord) except KeyError: pass repo.__class__ = kwrepo