# help.py - help data for mercurial
#
# Copyright 2006 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from i18n import gettext, _
import itertools, sys, os
import extensions, revset, fileset, templatekw, templatefilters, filemerge
import encoding, util
def listexts(header, exts, indent=1):
'''return a text listing of the given extensions'''
if not exts:
return ''
maxlength = max(len(e) for e in exts)
result = '\n%s\n\n' % header
for name, desc in sorted(exts.iteritems()):
result += '%s%-*s %s\n' % (' ' * indent, maxlength + 2,
':%s:' % name, desc)
return result
def extshelp():
doc = loaddoc('extensions')()
doc += listexts(_('enabled extensions:'), extensions.enabled())
doc += listexts(_('disabled extensions:'), extensions.disabled())
return doc
def topicmatch(kw):
"""Return help topics matching kw.
Returns {'section': [(name, summary), ...], ...} where section is
one of topics, commands, extensions, or extensioncommands.
"""
kw = encoding.lower(kw)
def lowercontains(container):
return kw in encoding.lower(_(container))
results = {'topics': [],
'commands': [],
'extensions': [],
'extensioncommands': [],
}
for names, header, doc in helptable:
if (sum(map(lowercontains, names))
or lowercontains(header)
or lowercontains(doc())):
results['topics'].append((names[0], header))
import commands # avoid cycle
for cmd, entry in commands.table.iteritems():
if cmd.startswith('debug'):
continue
if len(entry) == 3:
summary = entry[2]
else:
summary = ''
docs = getattr(entry[0], '__doc__', None) or ''
if kw in cmd or lowercontains(summary) or lowercontains(docs):
doclines = _(docs).splitlines()
if doclines:
summary = doclines[0]
cmdname = cmd.split('|')[0].lstrip('^')
results['commands'].append((cmdname, summary))
for name, docs in itertools.chain(
extensions.enabled().iteritems(),
extensions.disabled().iteritems()):
# extensions.load ignores the UI argument
mod = extensions.load(None, name, '')
if lowercontains(name) or lowercontains(docs):
results['extensions'].append((name, _(docs).splitlines()[0]))
for cmd, entry in getattr(mod, 'cmdtable', {}).iteritems():
if kw in cmd or (len(entry) > 2 and lowercontains(entry[2])):
cmdname = cmd.split('|')[0].lstrip('^')
results['extensioncommands'].append(
(cmdname, _(getattr(cmd, '__doc__', ''))))
return results
def loaddoc(topic):
"""Return a delayed loader for help/topic.txt."""
def loader():
if util.mainfrozen():
module = sys.executable
else:
module = __file__
base = os.path.dirname(module)
for dir in ('.', '..'):
docdir = os.path.join(base, dir, 'help')
if os.path.isdir(docdir):
break
path = os.path.join(docdir, topic + ".txt")
doc = gettext(util.readfile(path))
for rewriter in helphooks.get(topic, []):
doc = rewriter(topic, doc)
return doc
return loader
helptable = sorted([
(["config", "hgrc"], _("Configuration Files"), loaddoc('config')),
(["dates"], _("Date Formats"), loaddoc('dates')),
(["patterns"], _("File Name Patterns"), loaddoc('patterns')),
(['environment', 'env'], _('Environment Variables'),
loaddoc('environment')),
(['revs', 'revisions'], _('Specifying Single Revisions'),
loaddoc('revisions')),
(['mrevs', 'multirevs'], _('Specifying Multiple Revisions'),
loaddoc('multirevs')),
(['revset', 'revsets'], _("Specifying Revision Sets"), loaddoc('revsets')),
(['fileset', 'filesets'], _("Specifying File Sets"), loaddoc('filesets')),
(['diffs'], _('Diff Formats'), loaddoc('diffs')),
(['merge-tools'], _('Merge Tools'), loaddoc('merge-tools')),
(['templating', 'templates', 'template', 'style'], _('Template Usage'),
loaddoc('templates')),
(['urls'], _('URL Paths'), loaddoc('urls')),
(["extensions"], _("Using Additional Features"), extshelp),
(["subrepo", "subrepos"], _("Subrepositories"), loaddoc('subrepos')),
(["hgweb"], _("Configuring hgweb"), loaddoc('hgweb')),
(["glossary"], _("Glossary"), loaddoc('glossary')),
(["hgignore", "ignore"], _("Syntax for Mercurial Ignore Files"),
loaddoc('hgignore')),
(["phases"], _("Working with Phases"), loaddoc('phases')),
])
# Map topics to lists of callable taking the current topic help and
# returning the updated version
helphooks = {}
def addtopichook(topic, rewriter):
helphooks.setdefault(topic, []).append(rewriter)
def makeitemsdoc(topic, doc, marker, items):
"""Extract docstring from the items key to function mapping, build a
.single documentation block and use it to overwrite the marker in doc
"""
entries = []
for name in sorted(items):
text = (items[name].__doc__ or '').rstrip()
if not text:
continue
text = gettext(text)
lines = text.splitlines()
doclines = [(lines[0])]
for l in lines[1:]:
# Stop once we find some Python doctest
if l.strip().startswith('>>>'):
break
doclines.append(' ' + l.strip())
entries.append('\n'.join(doclines))
entries = '\n\n'.join(entries)
return doc.replace(marker, entries)
def addtopicsymbols(topic, marker, symbols):
def add(topic, doc):
return makeitemsdoc(topic, doc, marker, symbols)
addtopichook(topic, add)
addtopicsymbols('filesets', '.. predicatesmarker', fileset.symbols)
addtopicsymbols('merge-tools', '.. internaltoolsmarker', filemerge.internals)
addtopicsymbols('revsets', '.. predicatesmarker', revset.symbols)
addtopicsymbols('templates', '.. keywordsmarker', templatekw.keywords)
addtopicsymbols('templates', '.. filtersmarker', templatefilters.filters)