annotate mercurial/help.py @ 16239:287f76b3f502

hgweb: support multi-level repository indexes by enabling descend and collapse

The descend option in hgweb can be used to display all reachable repositories
within a directory hierarchy if set to True. However, all reachable
repositories, regardless of their depth below the root of the hierarchy, are
then listed at the same level - expanded - in the hgweb interface. This patch
adds support for showing only each level of a directory hierarchy, with
subrepositories being shown alongside their parent repositories only at the
appropriate level (because there is no way to navigate to subrepositories from
within repositories), and the contents of directories hidden - collapsed -
behind a link for each directory. To enable this multi-level navigation, a new
option called collapse must be set to True when the descend option is set to
True.

# help.py - help data for mercurial
#
# Copyright 2006 Matt Mackall <[e-mail]>
#
# 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 sys, os
import extensions, revset, fileset, templatekw, templatefilters, filemerge
import 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 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 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()
        lines[1:] = [('  ' + l.strip()) for l in lines[1:]]
        entries.append('\n'.join(lines))
    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)