~bzr-pqm/bzr/bzr.dev

4763.2.4 by John Arbash Meinel
merge bzr.2.1 in preparation for NEWS entry.
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# Copyright (C) 2005-2010 Canonical Ltd
1887.1.1 by Adeodato Simó
Do not separate paragraphs in the copyright statement with blank lines,
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#
351 by Martin Pool
- Split out help functions into bzrlib.help
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
1887.1.1 by Adeodato Simó
Do not separate paragraphs in the copyright statement with blank lines,
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#
351 by Martin Pool
- Split out help functions into bzrlib.help
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# GNU General Public License for more details.
1887.1.1 by Adeodato Simó
Do not separate paragraphs in the copyright statement with blank lines,
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#
351 by Martin Pool
- Split out help functions into bzrlib.help
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
4183.7.1 by Sabin Iacob
update FSF mailing address
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
351 by Martin Pool
- Split out help functions into bzrlib.help
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1162 by Martin Pool
- change Command infrastructure to use (mostly stateless) objects to
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# TODO: Some way to get a list of external commands (defined by shell
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# scripts) so that they can be included in the help listing as well.
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# It should be enough to just list the plugin directory and look for
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# executable files with reasonable names.
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# TODO: `help commands --all` should show hidden commands
351 by Martin Pool
- Split out help functions into bzrlib.help
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635 by Martin Pool
- manpage generator by Hans Ulrich Niedermann
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import sys
2023.1.1 by ghigo
add topics help
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2070.4.3 by John Arbash Meinel
code and doc cleanup
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from bzrlib import (
2432.1.3 by Robert Collins
Create a HelpContexts object to do help lookups.
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    commands as _mod_commands,
2432.1.5 by Robert Collins
Initial stub for topic searching.
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    errors,
2070.4.3 by John Arbash Meinel
code and doc cleanup
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    help_topics,
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    osutils,
2432.1.24 by Robert Collins
Add plugins as a help index.
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    plugin,
5875.3.1 by INADA Naoki
Implement command help l10n.
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    utextwrap,
2070.4.3 by John Arbash Meinel
code and doc cleanup
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    )
1993.4.4 by John Arbash Meinel
cleanup help.py
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3984.4.5 by Ian Clatworthy
help xxx is full help; xxx -h is concise help
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def help(topic=None, outfile=None):
2070.4.3 by John Arbash Meinel
code and doc cleanup
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    """Write the help for the specific topic to outfile"""
1993.4.4 by John Arbash Meinel
cleanup help.py
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    if outfile is None:
635 by Martin Pool
- manpage generator by Hans Ulrich Niedermann
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        outfile = sys.stdout
2070.4.13 by John Arbash Meinel
Switch help_topics to use a Registry.
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2432.1.16 by Robert Collins
Correct spelling of Indexs to Indices.
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    indices = HelpIndices()
2743.2.3 by Daniel Watkins
If an alias exists, it is displayed regardless of help also to be displayed.
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    alias = _mod_commands.get_alias(topic)
2743.2.1 by Daniel Watkins
Modified bzrlib.help to show the alias of a command if a NoHelpTopic exception is raised, reraising it if no alias exists.
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    try:
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        topics = indices.search(topic)
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        shadowed_terms = []
5255.3.1 by Parth Malwankar
bzrlib.help.help function was overwriting a topic arg
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        for index, topic_obj in topics[1:]:
2762.1.1 by Ian Clatworthy
(Daniel Watkins) teach bzr help to recognize aliases
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            shadowed_terms.append('%s%s' % (index.prefix,
5255.3.1 by Parth Malwankar
bzrlib.help.help function was overwriting a topic arg
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                topic_obj.get_help_topic()))
3984.4.2 by Ian Clatworthy
make help on commands concise by default
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        source = topics[0][1]
3984.4.5 by Ian Clatworthy
help xxx is full help; xxx -h is concise help
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        outfile.write(source.get_help_text(shadowed_terms))
2743.2.1 by Daniel Watkins
Modified bzrlib.help to show the alias of a command if a NoHelpTopic exception is raised, reraising it if no alias exists.
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    except errors.NoHelpTopic:
2743.2.5 by Daniel Watkins
Modified bzrlib.help as per abentley's comments.
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        if alias is None:
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            raise
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    if alias is not None:
2762.1.1 by Ian Clatworthy
(Daniel Watkins) teach bzr help to recognize aliases
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        outfile.write("'bzr %s' is an alias for 'bzr %s'.\n" % (topic,
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            " ".join(alias)))
635 by Martin Pool
- manpage generator by Hans Ulrich Niedermann
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1162 by Martin Pool
- change Command infrastructure to use (mostly stateless) objects to
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def help_commands(outfile=None):
351 by Martin Pool
- Split out help functions into bzrlib.help
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    """List all commands"""
2070.4.13 by John Arbash Meinel
Switch help_topics to use a Registry.
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    if outfile is None:
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        outfile = sys.stdout
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    outfile.write(_help_commands_to_text('commands'))
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def _help_commands_to_text(topic):
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    """Generate the help text for the list of commands"""
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    out = []
1551.9.14 by Aaron Bentley
Change topic to hidden-commands
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    if topic == 'hidden-commands':
1551.9.13 by Aaron Bentley
add "hidden" topic
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        hidden = True
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    else:
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        hidden = False
4119.3.4 by Robert Collins
Add Command lookup hooks: list_commands and get_command.
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    names = list(_mod_commands.all_command_names())
2432.1.3 by Robert Collins
Create a HelpContexts object to do help lookups.
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    commands = ((n, _mod_commands.get_cmd_object(n)) for n in names)
1551.9.13 by Aaron Bentley
add "hidden" topic
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    shown_commands = [(n, o) for n, o in commands if o.hidden == hidden]
2034.1.3 by Aaron Bentley
Changes from review and tweaks
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    max_name = max(len(n) for n, o in shown_commands)
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    indent = ' ' * (max_name + 1)
4747.3.6 by Vincent Ladeuil
terminal_width can now returns None.
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    width = osutils.terminal_width()
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    if width is None:
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        width = osutils.default_terminal_width
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    # we need one extra space for terminals that wrap on last char
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    width = width - 1
2070.4.13 by John Arbash Meinel
Switch help_topics to use a Registry.
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2034.1.3 by Aaron Bentley
Changes from review and tweaks
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    for cmd_name, cmd_object in sorted(shown_commands):
1733.2.5 by Michael Ellerman
Show which plugin (if any) provides a command.
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        plugin_name = cmd_object.plugin_name()
2034.1.1 by Aaron Bentley
Condense command help text
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        if plugin_name is None:
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            plugin_name = ''
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        else:
2034.1.4 by Aaron Bentley
Change angle brackets to square brackets
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            plugin_name = ' [%s]' % plugin_name
1733.2.5 by Michael Ellerman
Show which plugin (if any) provides a command.
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1162 by Martin Pool
- change Command infrastructure to use (mostly stateless) objects to
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        cmd_help = cmd_object.help()
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        if cmd_help:
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            firstline = cmd_help.split('\n', 1)[0]
2034.1.1 by Aaron Bentley
Condense command help text
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        else:
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            firstline = ''
2034.1.3 by Aaron Bentley
Changes from review and tweaks
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        helpstring = '%-*s %s%s' % (max_name, cmd_name, firstline, plugin_name)
5875.3.1 by INADA Naoki
Implement command help l10n.
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        lines = utextwrap.wrap(
4070.11.2 by Martin Pool
Ask textwrap not to break long words or on hyphens
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            helpstring, subsequent_indent=indent,
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            width=width,
4070.11.5 by Martin Pool
textwrap break_on_hyphens option is not available in python2.5
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            break_long_words=False)
2034.1.1 by Aaron Bentley
Condense command help text
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        for line in lines:
2070.4.13 by John Arbash Meinel
Switch help_topics to use a Registry.
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            out.append(line + '\n')
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    return ''.join(out)
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help_topics.topic_registry.register("commands",
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                                    _help_commands_to_text,
2666.1.1 by Ian Clatworthy
Bazaar User Reference generated from online help
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                                    "Basic help for all commands",
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                                    help_topics.SECT_HIDDEN)
2432.1.1 by Robert Collins
Add a HelpTopicContext object.
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help_topics.topic_registry.register("hidden-commands",
1551.9.13 by Aaron Bentley
add "hidden" topic
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                                    _help_commands_to_text,
2666.1.1 by Ian Clatworthy
Bazaar User Reference generated from online help
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                                    "All hidden commands",
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                                    help_topics.SECT_HIDDEN)
2432.1.3 by Robert Collins
Create a HelpContexts object to do help lookups.
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2432.1.16 by Robert Collins
Correct spelling of Indexs to Indices.
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class HelpIndices(object):
2432.1.31 by Robert Collins
Review feedback and put help.command_usage back in as a deprecated function.
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    """Maintainer of help topics across multiple indices.
3943.8.1 by Marius Kruger
remove all trailing whitespace from bzr source
120
2432.1.31 by Robert Collins
Review feedback and put help.command_usage back in as a deprecated function.
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    It is currently separate to the HelpTopicRegistry because of its ordered
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    nature, but possibly we should instead structure it as a search within the
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    registry and add ordering and searching facilities to the registry. The
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    registry would probably need to be restructured to support that cleanly
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    which is why this has been implemented in parallel even though it does as a
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    result permit searching for help in indices which are not discoverable via
2432.1.9 by Robert Collins
Expand HelpContexts documentation.
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    'help topics'.
2432.1.31 by Robert Collins
Review feedback and put help.command_usage back in as a deprecated function.
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    Each index has a unique prefix string, such as "commands", and contains
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    help topics which can be listed or searched.
2432.1.9 by Robert Collins
Expand HelpContexts documentation.
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    """
2432.1.3 by Robert Collins
Create a HelpContexts object to do help lookups.
132
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    def __init__(self):
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        self.search_path = [
2432.1.15 by Robert Collins
Rename Context (in bzrlib.help) to Index, for a clearer name.
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            help_topics.HelpTopicIndex(),
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            _mod_commands.HelpCommandIndex(),
2432.1.24 by Robert Collins
Add plugins as a help index.
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            plugin.PluginsHelpIndex(),
2432.1.3 by Robert Collins
Create a HelpContexts object to do help lookups.
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            ]
2432.1.5 by Robert Collins
Initial stub for topic searching.
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2432.1.19 by Robert Collins
Ensure each HelpIndex has a unique prefix.
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    def _check_prefix_uniqueness(self):
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        """Ensure that the index collection is able to differentiate safely."""
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        prefixes = {}
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        for index in self.search_path:
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            prefixes.setdefault(index.prefix, []).append(index)
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        for prefix, indices in prefixes.items():
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            if len(indices) > 1:
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                raise errors.DuplicateHelpPrefix(prefix)
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2432.1.5 by Robert Collins
Initial stub for topic searching.
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    def search(self, topic):
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        """Search for topic across the help search path.
3943.8.1 by Marius Kruger
remove all trailing whitespace from bzr source
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2432.1.5 by Robert Collins
Initial stub for topic searching.
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        :param topic: A string naming the help topic to search for.
2432.1.15 by Robert Collins
Rename Context (in bzrlib.help) to Index, for a clearer name.
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        :raises: NoHelpTopic if none of the indexs in search_path have topic.
2432.1.7 by Robert Collins
HelpContexts.search now returns the found topics.
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        :return: A list of HelpTopics which matched 'topic'.
2432.1.5 by Robert Collins
Initial stub for topic searching.
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        """
2432.1.19 by Robert Collins
Ensure each HelpIndex has a unique prefix.
156
        self._check_prefix_uniqueness()
2432.1.6 by Robert Collins
HelpContexts.search now invokes get_topics on each context.
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        result = []
2432.1.15 by Robert Collins
Rename Context (in bzrlib.help) to Index, for a clearer name.
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        for index in self.search_path:
2432.1.20 by Robert Collins
Modify the result of HelpIndices.search to include the index each result was found in.
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            result.extend([(index, _topic) for _topic in index.get_topics(topic)])
2432.1.6 by Robert Collins
HelpContexts.search now invokes get_topics on each context.
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        if not result:
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            raise errors.NoHelpTopic(topic)
2432.1.7 by Robert Collins
HelpContexts.search now returns the found topics.
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        else:
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            return result