# keyword.py - $Keyword$ expansion for Mercurial
#
# Copyright 2007 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
# keyword = /full/path/to/hgkw/keyword.py
# # or, if script in canonical hgext folder:
# # 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".
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.
Caveat: "hg import" fails if the patch context contains an active
keyword. In that case run "hg kwshrink", and then reimport.
Or, better, use bundle/unbundle to share changes.
'''
from mercurial import commands, cmdutil, context, dispatch
from mercurial import filelog, localrepo, revlog, templater, util
from mercurial.i18n import _
import re, shutil, sys, tempfile, time
commands.optionalrepo += ' kwdemo'
def utcdate(date):
'''Returns hgdate in cvs-like UTC format.'''
return time.strftime('%Y/%m/%d %H:%M:%S', time.gmtime(date[0]))
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, expand, path='', node=None):
self.ui = ui
self.repo = repo
self.t = expand or None
self.path = path
self.node = node
self.debug = self.ui.debugflag
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)(: [^$\n\r]*? )??\$' % '|'.join(escaped)
self.re_kw = re.compile(kwpat)
if self.t:
templater.common_filters['utcdate'] = utcdate
self.t = cmdutil.changeset_templater(self.ui, self.repo,
False, '', False)
def kwsub(self, mobj):
'''Substitutes keyword using corresponding template.'''
kw = mobj.group(1)
self.t.use_template(self.templates[kw])
self.ui.pushbuffer()
self.t.show(changenode=self.node, root=self.repo.root, file=self.path)
keywordsub = templater.firstline(self.ui.popbuffer())
return '$%s: %s $' % (kw, keywordsub)
def substitute(self, node, data, subfunc):
'''Obtains node if missing.
Ensures consistent templates regardless of ui.debugflag.
Calls given substitution function.'''
if not self.node:
c = context.filectx(self.repo, self.path, fileid=node)
self.node = c.node()
self.ui.debugflag = False
result = subfunc(self.kwsub, data)
self.ui.debugflag = self.debug
return result
def expand(self, node, data):
'''Returns data with keywords expanded.'''
if util.binary(data):
return data
return self.substitute(node, data, self.re_kw.sub)
def process(self, node, data):
'''Returns a tuple: data, count.
Count is number of keywords/keyword substitutions, indicates
to caller whether to act on file containing data.
Keywords in data are expanded, if templater was initialized.'''
if util.binary(data):
return data, None
if self.t:
return self.substitute(node, data, self.re_kw.subn)
return data, self.re_kw.search(data)
def shrink(self, text):
'''Returns text with all keyword substitutions removed.'''
if util.binary(text):
return text
return self.re_kw.sub(r'$\1$', text)
def overwrite(self, candidates, man, commit):
'''Overwrites files in working directory if keywords are detected.
Keywords are expanded if keyword templater is initialized,
otherwise their substitution is removed.'''
expand = self.t is not None
action = ('shrinking', 'expanding')[expand]
notify = (self.ui.note, self.ui.debug)[commit]
for f in candidates:
fp = self.repo.file(f, kwexp=expand, kwmatch=True)
data, kwfound = fp.kwctread(man[f])
if kwfound:
notify(_('overwriting %s %s keywords\n') % (f, action))
self.repo.wwrite(f, data, man.flags(f))
self.repo.dirstate.normal(f)
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, kwtemplater):
super(kwfilelog, self).__init__(opener, path)
self.kwtemplater = kwtemplater
def kwctread(self, node):
'''Reads expanding and counting keywords
(only called from kwtemplater.overwrite).'''
data = super(kwfilelog, self).read(node)
return self.kwtemplater.process(node, data)
def read(self, node):
'''Expands keywords when reading filelog.'''
data = super(kwfilelog, self).read(node)
return self.kwtemplater.expand(node, data)
def add(self, text, meta, tr, link, p1=None, p2=None):
'''Removes keyword substitutions when adding to filelog.'''
text = self.kwtemplater.shrink(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.kwtemplater.shrink(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, *pats, **opts):
'''Bails out if [keyword] configuration is not active.
Returns status of working directory.'''
if hasattr(ui, 'kwfmatcher'):
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 _iskwfile(ui, man, f):
return not man.linkf(f) and ui.kwfmatcher(f)
def _overwrite(ui, repo, files, node, man, expand, commit):
'''Passes given files to kwtemplater for overwriting.'''
files.sort()
kwt = kwtemplater(ui, repo, expand, node=node)
kwt.overwrite(files, man, commit)
def _kwfwrite(ui, repo, expand, *pats, **opts):
'''Selects files and passes them to _overwrite.'''
status = _status(ui, repo, *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()
ctx = repo.changectx()
man = ctx.manifest()
candidates = [f for f in clean if _iskwfile(ui, man, f)]
if candidates:
# 7th argument sets commit to False
_overwrite(ui, repo, candidates, ctx.node(), man, expand, False)
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['rcfile']:
kwstatus = 'custom'
if opts['rcfile']:
ui.readconfig(opts['rcfile'])
if opts['default']:
kwstatus = 'default'
kwmaps = kwtemplater.templates
if ui.configitems('keywordmaps'):
# override maps from optional rcfile
for k, v in kwmaps.items():
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['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.items())
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
verbose = ui.verbose
ui.quiet = not verbose
commands.branch(ui, repo, branchname)
ui.quiet = quiet
ui.note('hg -R "%s" ci -m "%s"\n' % (tmpdir, msg))
repo.commit(text=msg)
pathinfo = ('', ' in %s' % path)[ui.verbose]
demostatus('%s keywords expanded%s' % (kwstatus, pathinfo))
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.
'''
status = _status(ui, repo, *pats, **opts)
modified, added, removed, deleted, unknown, ignored, clean = status
if opts['untracked']:
files = modified + added + unknown + clean
else:
files = modified + added + clean
files.sort()
kwfiles = [f for f in files if ui.kwfmatcher(f) and not repo._link(f)]
cwd = pats and repo.getcwd() or ''
allf = opts['all']
ignore = opts['ignore']
flag = (allf or ui.verbose) and 1 or 0
if not ignore:
format = ('%s\n', 'K %s\n')[flag]
for k in kwfiles:
ui.write(format % repo.pathto(k, cwd))
if allf or ignore:
format = ('%s\n', 'I %s\n')[flag]
for i in [f for f in files if f not in kwfiles]:
ui.write(format % repo.pathto(i, 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.'''
nokwcommands = ['add', 'addremove', 'bundle', 'clone', 'copy', 'export',
'grep', 'identify', 'incoming', 'init', 'outgoing', 'push',
'remove', 'rename', 'rollback', 'convert']
if (not repo.local() or
dispatch._parse(ui, sys.argv[1:])[0] in nokwcommands):
return
inc, exc = [], ['.hgtags']
for pat, opt in ui.configitems('keyword'):
if opt != 'ignore':
inc.append(pat)
else:
exc.append(pat)
if not inc:
return
ui.kwfmatcher = util.matcher(repo.root, inc=inc, exc=exc)[1]
class kwrepo(repo.__class__):
def file(self, f, kwexp=True, kwmatch=False):
if f[0] == '/':
f = f[1:]
if kwmatch or ui.kwfmatcher(f):
kwt = kwtemplater(ui, self, kwexp, path=f)
return kwfilelog(self.sopener, f, kwt)
return filelog.filelog(self.sopener, f)
def commit(self, files=None, text='', user=None, date=None,
match=util.always, force=False, force_editor=False,
p1=None, p2=None, extra={}):
wlock = lock = None
try:
wlock = self.wlock()
lock = self.lock()
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)
if node is not None:
cl = self.changelog.read(node)
mn = self.manifest.read(cl[0])
candidates = [f for f in cl[3] if mn.has_key(f)
and _iskwfile(ui, mn, f)]
if candidates:
# 6th, 7th arguments set expansion, commit to True
_overwrite(ui, self, candidates, node, mn, True, True)
return node
finally:
del wlock, lock
repo.__class__ = kwrepo
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]...')),
}