# 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, os, textwrap
import error
import extensions, revset, fileset, templatekw, templatefilters, filemerge
import templater
import encoding, util, minirst
import cmdutil
import hgweb.webcommands as webcommands
_exclkeywords = [
"(DEPRECATED)",
"(EXPERIMENTAL)",
# i18n: "(DEPRECATED)" is a keyword, must be translated consistently
_("(DEPRECATED)"),
# i18n: "(EXPERIMENTAL)" is a keyword, must be translated consistently
_("(EXPERIMENTAL)"),
]
def listexts(header, exts, indent=1, showdeprecated=False):
'''return a text listing of the given extensions'''
rst = []
if exts:
rst.append('\n%s\n\n' % header)
for name, desc in sorted(exts.iteritems()):
if not showdeprecated and any(w in desc for w in _exclkeywords):
continue
rst.append('%s:%s: %s\n' % (' ' * indent, name, desc))
return rst
def extshelp(ui):
rst = loaddoc('extensions')(ui).splitlines(True)
rst.extend(listexts(
_('enabled extensions:'), extensions.enabled(), showdeprecated=True))
rst.extend(listexts(_('disabled extensions:'), extensions.disabled()))
doc = ''.join(rst)
return doc
def optrst(header, options, verbose):
data = []
multioccur = False
for option in options:
if len(option) == 5:
shortopt, longopt, default, desc, optlabel = option
else:
shortopt, longopt, default, desc = option
optlabel = _("VALUE") # default label
if not verbose and any(w in desc for w in _exclkeywords):
continue
so = ''
if shortopt:
so = '-' + shortopt
lo = '--' + longopt
if default:
desc += _(" (default: %s)") % default
if isinstance(default, list):
lo += " %s [+]" % optlabel
multioccur = True
elif (default is not None) and not isinstance(default, bool):
lo += " %s" % optlabel
data.append((so, lo, desc))
if multioccur:
header += (_(" ([+] can be repeated)"))
rst = ['\n%s:\n\n' % header]
rst.extend(minirst.maketable(data, 1))
return ''.join(rst)
def indicateomitted(rst, omitted, notomitted=None):
rst.append('\n\n.. container:: omitted\n\n %s\n\n' % omitted)
if notomitted:
rst.append('\n\n.. container:: notomitted\n\n %s\n\n' % notomitted)
def topicmatch(ui, 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) # translated in helptable
results = {'topics': [],
'commands': [],
'extensions': [],
'extensioncommands': [],
}
for names, header, doc in helptable:
# Old extensions may use a str as doc.
if (sum(map(lowercontains, names))
or lowercontains(header)
or (callable(doc) and lowercontains(doc(ui)))):
results['topics'].append((names[0], header))
import commands # avoid cycle
for cmd, entry in commands.table.iteritems():
if len(entry) == 3:
summary = entry[2]
else:
summary = ''
# translate docs *before* searching there
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(False).iteritems(),
extensions.disabled().iteritems()):
# extensions.load ignores the UI argument
mod = extensions.load(None, name, '')
name = name.split('.')[-1]
if lowercontains(name) or lowercontains(docs):
# extension docs are already translated
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('^')
if entry[0].__doc__:
cmddoc = gettext(entry[0].__doc__).splitlines()[0]
else:
cmddoc = _('(no help text available)')
results['extensioncommands'].append((cmdname, cmddoc))
return results
def loaddoc(topic):
"""Return a delayed loader for help/topic.txt."""
def loader(ui):
docdir = os.path.join(util.datapath, 'help')
path = os.path.join(docdir, topic + ".txt")
doc = gettext(util.readfile(path))
for rewriter in helphooks.get(topic, []):
doc = rewriter(ui, 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')),
(['revisions', 'revs'], _('Specifying Single Revisions'),
loaddoc('revisions')),
(['multirevs', 'mrevs'], _('Specifying Multiple Revisions'),
loaddoc('multirevs')),
(['revsets', 'revset'], _("Specifying Revision Sets"), loaddoc('revsets')),
(['filesets', 'fileset'], _("Specifying File Sets"), loaddoc('filesets')),
(['diffs'], _('Diff Formats'), loaddoc('diffs')),
(['merge-tools', 'mergetools'], _('Merge Tools'), loaddoc('merge-tools')),
(['templating', 'templates', 'template', 'style'], _('Template Usage'),
loaddoc('templates')),
(['urls'], _('URL Paths'), loaddoc('urls')),
(["extensions"], _("Using Additional Features"), extshelp),
(["subrepos", "subrepo"], _("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')),
(['scripting'], _('Using Mercurial from scripts and automation'),
loaddoc('scripting')),
])
# 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(ui, topic, doc, marker, items, dedent=False):
"""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
or not ui.verbose and any(w in text for w in _exclkeywords)):
continue
text = gettext(text)
if dedent:
text = textwrap.dedent(text)
lines = text.splitlines()
doclines = [(lines[0])]
for l in lines[1:]:
# Stop once we find some Python doctest
if l.strip().startswith('>>>'):
break
if dedent:
doclines.append(l.rstrip())
else:
doclines.append(' ' + l.strip())
entries.append('\n'.join(doclines))
entries = '\n\n'.join(entries)
return doc.replace(marker, entries)
def addtopicsymbols(topic, marker, symbols, dedent=False):
def add(ui, topic, doc):
return makeitemsdoc(ui, topic, doc, marker, symbols, dedent=dedent)
addtopichook(topic, add)
addtopicsymbols('filesets', '.. predicatesmarker', fileset.symbols)
addtopicsymbols('merge-tools', '.. internaltoolsmarker',
filemerge.internalsdoc)
addtopicsymbols('revsets', '.. predicatesmarker', revset.symbols)
addtopicsymbols('templates', '.. keywordsmarker', templatekw.keywords)
addtopicsymbols('templates', '.. filtersmarker', templatefilters.filters)
addtopicsymbols('templates', '.. functionsmarker', templater.funcs)
addtopicsymbols('hgweb', '.. webcommandsmarker', webcommands.commands,
dedent=True)
def help_(ui, name, unknowncmd=False, full=True, **opts):
'''
Generate the help for 'name' as unformatted restructured text. If
'name' is None, describe the commands available.
'''
import commands # avoid cycle
def helpcmd(name):
try:
aliases, entry = cmdutil.findcmd(name, commands.table,
strict=unknowncmd)
except error.AmbiguousCommand as inst:
# py3k fix: except vars can't be used outside the scope of the
# except block, nor can be used inside a lambda. python issue4617
prefix = inst.args[0]
select = lambda c: c.lstrip('^').startswith(prefix)
rst = helplist(select)
return rst
rst = []
# check if it's an invalid alias and display its error if it is
if getattr(entry[0], 'badalias', None):
rst.append(entry[0].badalias + '\n')
if entry[0].unknowncmd:
try:
rst.extend(helpextcmd(entry[0].cmdname))
except error.UnknownCommand:
pass
return rst
# synopsis
if len(entry) > 2:
if entry[2].startswith('hg'):
rst.append("%s\n" % entry[2])
else:
rst.append('hg %s %s\n' % (aliases[0], entry[2]))
else:
rst.append('hg %s\n' % aliases[0])
# aliases
if full and not ui.quiet and len(aliases) > 1:
rst.append(_("\naliases: %s\n") % ', '.join(aliases[1:]))
rst.append('\n')
# description
doc = gettext(entry[0].__doc__)
if not doc:
doc = _("(no help text available)")
if util.safehasattr(entry[0], 'definition'): # aliased command
if entry[0].definition.startswith('!'): # shell alias
doc = _('shell alias for::\n\n %s') % entry[0].definition[1:]
else:
doc = _('alias for: hg %s\n\n%s') % (entry[0].definition, doc)
doc = doc.splitlines(True)
if ui.quiet or not full:
rst.append(doc[0])
else:
rst.extend(doc)
rst.append('\n')
# check if this command shadows a non-trivial (multi-line)
# extension help text
try:
mod = extensions.find(name)
doc = gettext(mod.__doc__) or ''
if '\n' in doc.strip():
msg = _('(use "hg help -e %s" to show help for '
'the %s extension)') % (name, name)
rst.append('\n%s\n' % msg)
except KeyError:
pass
# options
if not ui.quiet and entry[1]:
rst.append(optrst(_("options"), entry[1], ui.verbose))
if ui.verbose:
rst.append(optrst(_("global options"),
commands.globalopts, ui.verbose))
if not ui.verbose:
if not full:
rst.append(_('\n(use "hg %s -h" to show more help)\n')
% name)
elif not ui.quiet:
rst.append(_('\n(some details hidden, use --verbose '
'to show complete help)'))
return rst
def helplist(select=None):
# list of commands
if name == "shortlist":
header = _('basic commands:\n\n')
elif name == "debug":
header = _('debug commands (internal and unsupported):\n\n')
else:
header = _('list of commands:\n\n')
h = {}
cmds = {}
for c, e in commands.table.iteritems():
f = c.split("|", 1)[0]
if select and not select(f):
continue
if (not select and name != 'shortlist' and
e[0].__module__ != commands.__name__):
continue
if name == "shortlist" and not f.startswith("^"):
continue
f = f.lstrip("^")
if not ui.debugflag and f.startswith("debug") and name != "debug":
continue
doc = e[0].__doc__
if not ui.verbose and doc and any(w in doc for w in _exclkeywords):
continue
doc = gettext(doc)
if not doc:
doc = _("(no help text available)")
h[f] = doc.splitlines()[0].rstrip()
cmds[f] = c.lstrip("^")
rst = []
if not h:
if not ui.quiet:
rst.append(_('no commands defined\n'))
return rst
if not ui.quiet:
rst.append(header)
fns = sorted(h)
for f in fns:
if ui.verbose:
commacmds = cmds[f].replace("|",", ")
rst.append(" :%s: %s\n" % (commacmds, h[f]))
else:
rst.append(' :%s: %s\n' % (f, h[f]))
if not name:
exts = listexts(_('enabled extensions:'), extensions.enabled())
if exts:
rst.append('\n')
rst.extend(exts)
rst.append(_("\nadditional help topics:\n\n"))
topics = []
for names, header, doc in helptable:
topics.append((names[0], header))
for t, desc in topics:
rst.append(" :%s: %s\n" % (t, desc))
if ui.quiet:
pass
elif ui.verbose:
rst.append('\n%s\n' % optrst(_("global options"),
commands.globalopts, ui.verbose))
if name == 'shortlist':
rst.append(_('\n(use "hg help" for the full list '
'of commands)\n'))
else:
if name == 'shortlist':
rst.append(_('\n(use "hg help" for the full list of commands '
'or "hg -v" for details)\n'))
elif name and not full:
rst.append(_('\n(use "hg help %s" to show the full help '
'text)\n') % name)
elif name and cmds and name in cmds.keys():
rst.append(_('\n(use "hg help -v -e %s" to show built-in '
'aliases and global options)\n') % name)
else:
rst.append(_('\n(use "hg help -v%s" to show built-in aliases '
'and global options)\n')
% (name and " " + name or ""))
return rst
def helptopic(name):
for names, header, doc in helptable:
if name in names:
break
else:
raise error.UnknownCommand(name)
rst = [minirst.section(header)]
# description
if not doc:
rst.append(" %s\n" % _("(no help text available)"))
if callable(doc):
rst += [" %s\n" % l for l in doc(ui).splitlines()]
if not ui.verbose:
omitted = _('(some details hidden, use --verbose'
' to show complete help)')
indicateomitted(rst, omitted)
try:
cmdutil.findcmd(name, commands.table)
rst.append(_('\nuse "hg help -c %s" to see help for '
'the %s command\n') % (name, name))
except error.UnknownCommand:
pass
return rst
def helpext(name):
try:
mod = extensions.find(name)
doc = gettext(mod.__doc__) or _('no help text available')
except KeyError:
mod = None
doc = extensions.disabledext(name)
if not doc:
raise error.UnknownCommand(name)
if '\n' not in doc:
head, tail = doc, ""
else:
head, tail = doc.split('\n', 1)
rst = [_('%s extension - %s\n\n') % (name.split('.')[-1], head)]
if tail:
rst.extend(tail.splitlines(True))
rst.append('\n')
if not ui.verbose:
omitted = _('(some details hidden, use --verbose'
' to show complete help)')
indicateomitted(rst, omitted)
if mod:
try:
ct = mod.cmdtable
except AttributeError:
ct = {}
modcmds = set([c.split('|', 1)[0] for c in ct])
rst.extend(helplist(modcmds.__contains__))
else:
rst.append(_('(use "hg help extensions" for information on enabling'
' extensions)\n'))
return rst
def helpextcmd(name):
cmd, ext, mod = extensions.disabledcmd(ui, name,
ui.configbool('ui', 'strict'))
doc = gettext(mod.__doc__).splitlines()[0]
rst = listexts(_("'%s' is provided by the following "
"extension:") % cmd, {ext: doc}, indent=4)
rst.append('\n')
rst.append(_('(use "hg help extensions" for information on enabling '
'extensions)\n'))
return rst
rst = []
kw = opts.get('keyword')
if kw:
matches = topicmatch(ui, name)
helpareas = []
if opts.get('extension'):
helpareas += [('extensions', _('Extensions'))]
if opts.get('command'):
helpareas += [('commands', _('Commands'))]
if not helpareas:
helpareas = [('topics', _('Topics')),
('commands', _('Commands')),
('extensions', _('Extensions')),
('extensioncommands', _('Extension Commands'))]
for t, title in helpareas:
if matches[t]:
rst.append('%s:\n\n' % title)
rst.extend(minirst.maketable(sorted(matches[t]), 1))
rst.append('\n')
if not rst:
msg = _('no matches')
hint = _('try "hg help" for a list of topics')
raise error.Abort(msg, hint=hint)
elif name and name != 'shortlist':
queries = []
if unknowncmd:
queries += [helpextcmd]
if opts.get('extension'):
queries += [helpext]
if opts.get('command'):
queries += [helpcmd]
if not queries:
queries = (helptopic, helpcmd, helpext, helpextcmd)
for f in queries:
try:
rst = f(name)
break
except error.UnknownCommand:
pass
else:
if unknowncmd:
raise error.UnknownCommand(name)
else:
msg = _('no such help topic: %s') % name
hint = _('try "hg help --keyword %s"') % name
raise error.Abort(msg, hint=hint)
else:
# program name
if not ui.quiet:
rst = [_("Mercurial Distributed SCM\n"), '\n']
rst.extend(helplist())
return ''.join(rst)