~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2004, 2005 by Canonical Ltd

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

global_help = \

"""Bazaar-NG -- a free distributed version-control tool

http://bazaar-ng.org/

**WARNING: THIS IS AN UNSTABLE DEVELOPMENT VERSION**

* Metadata format is not stable yet -- you may need to

  discard history in the future.

* Many commands unimplemented or partially implemented.

* Space-inefficient storage.

* No merge operators yet.

To make a branch, use 'bzr init' in an existing directory, then 'bzr

add' to make files versioned.  'bzr add .' will recursively add all

non-ignored files.

'bzr status' describes files that are unknown, ignored, or modified.

'bzr diff' shows the text changes to the tree or named files.

'bzr commit -m <MESSAGE>' commits all changes in that branch.

'bzr move' and 'bzr rename' allow you to rename files or directories.

'bzr remove' makes a file unversioned but keeps the working copy;

to delete that too simply delete the file.

'bzr log' shows a history of changes, and

'bzr info' gives summary statistical information.

'bzr check' validates all files are stored safely.

Files can be ignored by giving a path or a glob in .bzrignore at the

top of the tree.  Use 'bzr ignored' to see what files are ignored and

why, and 'bzr unknowns' to see files that are neither versioned or

ignored.

For more help on any command, type 'bzr help COMMAND', or 'bzr help

commands' for a list.

"""

import sys

def help(topic=None, outfile = None):

    if outfile == None:

        outfile = sys.stdout

    if topic == None:

        outfile.write(global_help)

    elif topic == 'commands':

        help_commands(outfile = outfile)

    else:

        help_on_command(topic, outfile = outfile)

def command_usage(cmdname, cmdclass):

    """Return single-line grammar for command.

    Only describes arguments, not options.

    """

    s = cmdname + ' '

    for aname in cmdclass.takes_args:

        aname = aname.upper()

        if aname[-1] in ['$', '+']:

            aname = aname[:-1] + '...'

        elif aname[-1] == '?':

            aname = '[' + aname[:-1] + ']'

        elif aname[-1] == '*':

            aname = '[' + aname[:-1] + '...]'

        s += aname + ' '

    assert s[-1] == ' '

    s = s[:-1]

    return s

def help_on_command(cmdname, outfile = None):

    cmdname = str(cmdname)

    if outfile == None:

        outfile = sys.stdout

    from inspect import getdoc

    import commands

    topic, cmdclass = commands.get_cmd_class(cmdname)

    doc = getdoc(cmdclass)

    if doc == None:

        raise NotImplementedError("sorry, no detailed help yet for %r" % cmdname)

    outfile.write('usage: ' + command_usage(topic, cmdclass) + '\n')

    if cmdclass.aliases:

        outfile.write('aliases: ' + ', '.join(cmdclass.aliases) + '\n')

    outfile.write(doc)

    help_on_option(cmdclass.takes_options, outfile = None)

def help_on_option(options, outfile = None):

    import commands

    if not options:

        return

    if outfile == None:

        outfile = sys.stdout

    outfile.write('\noptions:\n')

    for on in options:

        l = '    --' + on

        for shortname, longname in commands.SHORT_OPTIONS.items():

            if longname == on:

                l += ', -' + shortname

                break

        outfile.write(l + '\n')

def help_commands(outfile = None):

    """List all commands"""

    import inspect

    import commands

    if outfile == None:

        outfile = sys.stdout

    accu = []

    for cmdname, cmdclass in commands.get_all_cmds():

        accu.append((cmdname, cmdclass))

    accu.sort()

    for cmdname, cmdclass in accu:

        if cmdclass.hidden:

            continue

        outfile.write(command_usage(cmdname, cmdclass) + '\n')

        help = inspect.getdoc(cmdclass)

        if help:

            outfile.write("    " + help.split('\n', 1)[0] + '\n')