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author | Bryan O'Sullivan <bos@serpentine.com> |
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date | Wed, 05 Mar 2008 09:10:45 -0800 |
parents | 09b00faa8670 |
children | f89fd07fc51d |
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# keyword.py - $Keyword$ expansion for Mercurial # # Copyright 2007, 2008 Christian Ebert <blacktrash@gmx.net> # # This software may be used and distributed according to the terms # of the GNU General Public License, incorporated herein by reference. # # $Id$ # # 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 # <http://www.selenic.com/mercurial/wiki/index.cgi/KeywordPlan>. # # Keyword expansion is based on Mercurial's changeset template mappings. # # Binary files are not touched. # # Setup in hgrc: # # [extensions] # # enable extension # hgext.keyword = # # 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. '''keyword expansion in local repositories 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. Configuration is done in the [keyword] and [keywordmaps] sections of hgrc files. Example: [keyword] # expand keywords in every python file except those matching "x*" **.py = x* = ignore Note: the more specific you are in your filename patterns the less you lose speed in huge repos. For [keywordmaps] template mapping and expansion demonstration and control run "hg kwdemo". An additional date template filter {date|utcdate} is provided. 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 config changes. Before changing/disabling active keywords, run "hg kwshrink" to avoid the risk of inadvertedly storing expanded keywords in the change history. To force expansion after enabling it, or a configuration change, run "hg kwexpand". Also, when committing with the record extension or using mq's qrecord, be aware that keywords cannot be updated. Again, run "hg kwexpand" on the files in question to update keyword expansions after all changes have been checked in. 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, cmdutil, context, dispatch, filelog, revlog from mercurial import patch, localrepo, templater, templatefilters, util from mercurial.hgweb import webcommands from mercurial.node import * from mercurial.i18n import _ import re, shutil, tempfile, time commands.optionalrepo += ' kwdemo' # hg commands that do not act on keywords nokwcommands = ('add addremove bundle copy export grep incoming init' ' log outgoing push rename rollback tip' ' 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 = 'record qfold qimport qnew qpush qrefresh qrecord' def utcdate(date): '''Returns hgdate in cvs-like UTC format.''' return time.strftime('%Y/%m/%d %H:%M:%S', time.gmtime(date[0])) # make keyword tools accessible kwtools = {'templater': None, 'hgcmd': None} # store originals of monkeypatches _patchfile_init = patch.patchfile.__init__ _patch_diff = patch.diff _dispatch_parse = dispatch._parse def _kwpatchfile_init(self, ui, fname, missing=False): '''Monkeypatch/wrap patch.patchfile.__init__ to avoid rejects or conflicts due to expanded keywords in working dir.''' _patchfile_init(self, ui, fname, missing=missing) # shrink keywords read from working dir kwt = kwtools['templater'] self.lines = kwt.shrinklines(self.fname, self.lines) def _kw_diff(repo, node1=None, node2=None, files=None, match=util.always, fp=None, changes=None, opts=None): '''Monkeypatch patch.diff to avoid expansion except when comparing against working dir.''' if node2 is not None: kwtools['templater'].matcher = util.never elif node1 is not None and node1 != repo.changectx().node(): kwtools['templater'].restrict = True _patch_diff(repo, node1=node1, node2=node2, files=files, match=match, fp=fp, changes=changes, opts=opts) def _kwweb_changeset(web, req, tmpl): '''Wraps webcommands.changeset turning off keyword expansion.''' kwtools['templater'].matcher = util.never return web.changeset(tmpl, web.changectx(req)) def _kwweb_filediff(web, req, tmpl): '''Wraps webcommands.filediff turning off keyword expansion.''' kwtools['templater'].matcher = util.never return web.filediff(tmpl, web.filectx(req)) def _kwdispatch_parse(ui, args): '''Monkeypatch dispatch._parse to obtain running hg command.''' cmd, func, args, options, cmdoptions = _dispatch_parse(ui, args) kwtools['hgcmd'] = cmd return cmd, func, args, options, cmdoptions # dispatch._parse is run before reposetup, so wrap it here dispatch._parse = _kwdispatch_parse class kwtemplater(object): ''' Sets up keyword templates, corresponding keyword regex, and provides keyword substitution functions. ''' templates = { 'Revision': '{node|short}', 'Author': '{author|user}', 'Date': '{date|utcdate}', 'RCSFile': '{file|basename},v', 'Source': '{root}/{file},v', 'Id': '{file|basename},v {node|short} {date|utcdate} {author|user}', 'Header': '{root}/{file},v {node|short} {date|utcdate} {author|user}', } def __init__(self, ui, repo, inc, exc): self.ui = ui self.repo = repo self.matcher = util.matcher(repo.root, inc=inc, exc=exc)[1] self.restrict = kwtools['hgcmd'] in restricted.split() kwmaps = self.ui.configitems('keywordmaps') if kwmaps: # override default templates kwmaps = [(k, templater.parsestring(v, quoted=False)) for (k, v) in kwmaps] self.templates = dict(kwmaps) escaped = map(re.escape, self.templates.keys()) kwpat = r'\$(%s)(: [^$\n\r]*? )??\$' % '|'.join(escaped) self.re_kw = re.compile(kwpat) templatefilters.filters['utcdate'] = utcdate self.ct = cmdutil.changeset_templater(self.ui, self.repo, False, '', False) def getnode(self, path, fnode): '''Derives changenode from file path and filenode.''' # used by kwfilelog.read and kwexpand c = context.filectx(self.repo, path, fileid=fnode) return c.node() def substitute(self, data, path, node, subfunc): '''Replaces keywords in data with expanded template.''' def kwsub(mobj): kw = mobj.group(1) self.ct.use_template(self.templates[kw]) self.ui.pushbuffer() self.ct.show(changenode=node, root=self.repo.root, file=path) ekw = templatefilters.firstline(self.ui.popbuffer()) return '$%s: %s $' % (kw, ekw) return subfunc(kwsub, data) def expand(self, path, node, data): '''Returns data with keywords expanded.''' if not self.restrict and self.matcher(path) and not util.binary(data): changenode = self.getnode(path, node) return self.substitute(data, path, changenode, self.re_kw.sub) return data def iskwfile(self, path, islink): '''Returns true if path matches [keyword] pattern and is not a symbolic link. Caveat: localrepository._link fails on Windows.''' return self.matcher(path) and not islink(path) def overwrite(self, node=None, expand=True, files=None): '''Overwrites selected files expanding/shrinking keywords.''' ctx = self.repo.changectx(node) mf = ctx.manifest() if node is not None: # commit files = [f for f in ctx.files() if f in mf] notify = self.ui.debug else: # kwexpand/kwshrink notify = self.ui.note candidates = [f for f in files if self.iskwfile(f, mf.linkf)] if candidates: self.restrict = True # do not expand when reading candidates.sort() action = expand and 'expanding' or 'shrinking' for f in candidates: fp = self.repo.file(f) data = fp.read(mf[f]) if util.binary(data): continue if expand: changenode = node or self.getnode(f, mf[f]) data, found = self.substitute(data, f, changenode, self.re_kw.subn) else: found = self.re_kw.search(data) if found: notify(_('overwriting %s %s keywords\n') % (f, action)) self.repo.wwrite(f, data, mf.flags(f)) self.repo.dirstate.normal(f) self.restrict = False def shrinktext(self, text): '''Unconditionally removes all keyword substitutions from text.''' return self.re_kw.sub(r'$\1$', text) def shrink(self, fname, text): '''Returns text with all keyword substitutions removed.''' if self.matcher(fname) and not util.binary(text): return self.shrinktext(text) return text def shrinklines(self, fname, lines): '''Returns lines with keyword substitutions removed.''' if self.matcher(fname): text = ''.join(lines) if not util.binary(text): return self.shrinktext(text).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, path): super(kwfilelog, self).__init__(opener, path) self.kwt = kwtools['templater'] self.path = path def read(self, node): '''Expands keywords when reading filelog.''' data = super(kwfilelog, self).read(node) 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=p1, p2=p2) def cmp(self, node, text): '''Removes keyword substitutions for comparison.''' text = self.kwt.shrink(self.path, text) if self.renamed(node): t2 = super(kwfilelog, self).read(node) return t2 != text return revlog.revlog.cmp(self, node, text) def _status(ui, repo, kwt, *pats, **opts): '''Bails out if [keyword] configuration is not active. Returns status of working directory.''' if kwt: files, match, anypats = cmdutil.matchpats(repo, pats, opts) return repo.status(files=files, match=match, list_clean=True) 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.''' kwt = kwtools['templater'] 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 in given files')) wlock = lock = None try: wlock = repo.wlock() lock = repo.lock() kwt.overwrite(expand=expand, files=clean) finally: del wlock, lock def demo(ui, repo, *args, **opts): '''print [keywordmaps] configuration and an expansion example Show current, custom, or default keyword template maps and their expansion. Extend current configuration by specifying maps as arguments and optionally by reading from an additional hgrc file. Override current keyword template maps with "default" option. ''' def demostatus(stat): ui.status(_('\n\t%s\n') % stat) def demoitems(section, items): ui.write('[%s]\n' % section) for k, v in items: ui.write('%s = %s\n' % (k, v)) msg = 'hg keyword config and expansion example' kwstatus = 'current' fn = 'demo.txt' branchname = 'demobranch' tmpdir = tempfile.mkdtemp('', 'kwdemo.') ui.note(_('creating temporary repo at %s\n') % tmpdir) repo = localrepo.localrepository(ui, path=tmpdir, create=True) ui.setconfig('keyword', fn, '') if args or opts.get('rcfile'): kwstatus = 'custom' if opts.get('rcfile'): ui.readconfig(opts.get('rcfile')) if opts.get('default'): kwstatus = 'default' kwmaps = kwtemplater.templates if ui.configitems('keywordmaps'): # override maps from optional rcfile for k, v in kwmaps.iteritems(): ui.setconfig('keywordmaps', k, v) elif 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')) if not opts.get('default'): kwmaps = dict(ui.configitems('keywordmaps')) or kwtemplater.templates reposetup(ui, repo) for k, v in ui.configitems('extensions'): if k.endswith('keyword'): extension = '%s = %s' % (k, v) break demostatus('config using %s keyword template maps' % kwstatus) ui.write('[extensions]\n%s\n' % extension) demoitems('keyword', ui.configitems('keyword')) demoitems('keywordmaps', kwmaps.iteritems()) keywords = '$' + '$\n$'.join(kwmaps.keys()) + '$\n' repo.wopener(fn, 'w').write(keywords) repo.add([fn]) path = repo.wjoin(fn) ui.note(_('\n%s keywords written to %s:\n') % (kwstatus, path)) ui.note(keywords) ui.note('\nhg -R "%s" branch "%s"\n' % (tmpdir, branchname)) # silence branch command if not verbose quiet = ui.quiet ui.quiet = not ui.verbose commands.branch(ui, repo, branchname) ui.quiet = quiet for name, cmd in ui.configitems('hooks'): if name.split('.', 1)[0].find('commit') > -1: repo.ui.setconfig('hooks', name, '') ui.note(_('unhooked all commit hooks\n')) ui.note('hg -R "%s" ci -m "%s"\n' % (tmpdir, msg)) repo.commit(text=msg) format = ui.verbose and ' in %s' % path or '' demostatus('%s keywords expanded%s' % (kwstatus, format)) ui.write(repo.wread(fn)) ui.debug(_('\nremoving temporary repo %s\n') % tmpdir) shutil.rmtree(tmpdir, ignore_errors=True) def expand(ui, repo, *pats, **opts): '''expand keywords in 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) def files(ui, repo, *pats, **opts): '''print files currently configured for keyword expansion Crosscheck which files in working directory are potential targets for keyword expansion. That is, files matched by [keyword] config patterns but not symlinks. ''' kwt = kwtools['templater'] status = _status(ui, repo, kwt, *pats, **opts) modified, added, removed, deleted, unknown, ignored, clean = status files = modified + added + clean if opts.get('untracked'): files += unknown files.sort() wctx = repo.workingctx() islink = lambda p: 'l' in wctx.fileflags(p) kwfiles = [f for f in files if kwt.iskwfile(f, islink)] cwd = pats and repo.getcwd() or '' kwfstats = not opts.get('ignore') and (('K', kwfiles),) or () if opts.get('all') or opts.get('ignore'): kwfstats += (('I', [f for f in files if f not in kwfiles]),) for char, filenames in kwfstats: format = (opts.get('all') or ui.verbose) and '%s %%s\n' % char or '%s\n' for f in filenames: ui.write(format % repo.pathto(f, cwd)) def shrink(ui, repo, *pats, **opts): '''revert expanded keywords in working directory Run before changing/disabling active keywords or if you experience problems with "hg import" or "hg merge". kwshrink refuses to run if given files contain local changes. ''' # 3rd argument sets expansion to False _kwfwrite(ui, repo, False, *pats, **opts) 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. This is done for local repos only, and only if there are files configured at all for keyword substitution.''' 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, f) def wread(self, filename): data = super(kwrepo, self).wread(filename) return kwt.wread(filename, data) def commit(self, files=None, text='', user=None, date=None, match=util.always, force=False, force_editor=False, p1=None, p2=None, extra={}, empty_ok=False): wlock = lock = None _p1 = _p2 = None try: wlock = self.wlock() lock = self.lock() # store and postpone commit hooks commithooks = {} for name, cmd in ui.configitems('hooks'): if name.split('.', 1)[0] == 'commit': commithooks[name] = cmd ui.setconfig('hooks', name, None) if commithooks: # store parents for commit hook environment if p1 is None: _p1, _p2 = repo.dirstate.parents() else: _p1, _p2 = p1, p2 or nullid _p1 = hex(_p1) if _p2 == nullid: _p2 = '' else: _p2 = hex(_p2) node = super(kwrepo, self).commit(files=files, text=text, user=user, date=date, match=match, force=force, force_editor=force_editor, p1=p1, p2=p2, extra=extra, empty_ok=empty_ok) # restore commit hooks for name, cmd in commithooks.iteritems(): ui.setconfig('hooks', name, cmd) if node is not None: kwt.overwrite(node=node) repo.hook('commit', node=node, parent1=_p1, parent2=_p2) return node finally: del wlock, lock repo.__class__ = kwrepo patch.patchfile.__init__ = _kwpatchfile_init patch.diff = _kw_diff webcommands.changeset = webcommands.rev = _kwweb_changeset webcommands.filediff = webcommands.diff = _kwweb_filediff cmdtable = { 'kwdemo': (demo, [('d', 'default', None, _('show default keyword template maps')), ('f', 'rcfile', [], _('read maps from rcfile'))], _('hg kwdemo [-d] [-f RCFILE] [TEMPLATEMAP]...')), 'kwexpand': (expand, commands.walkopts, _('hg kwexpand [OPTION]... [FILE]...')), 'kwfiles': (files, [('a', 'all', None, _('show keyword status flags of all files')), ('i', 'ignore', None, _('show files excluded from expansion')), ('u', 'untracked', None, _('additionally show untracked files')), ] + commands.walkopts, _('hg kwfiles [OPTION]... [FILE]...')), 'kwshrink': (shrink, commands.walkopts, _('hg kwshrink [OPTION]... [FILE]...')), }