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# 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
# TODO: Some way to get a list of external commands (defined by shell
# scripts) so that they can be included in the help listing as well.
# It should be enough to just list the plugin directory and look for
# executable files with reasonable names.
# TODO: `help commands --all` should show hidden commands
import textwrap
global_help = \
"""Bazaar-NG -- a free distributed version-control tool
http://bazaar-ng.org/
WARNING: This is an unstable development version.
Please keep backups.
Basic commands:
bzr init makes this directory a versioned branch
bzr branch make a copy of another branch
bzr add make files or directories versioned
bzr ignore ignore a file or pattern
bzr mv move or rename a versioned file
bzr status summarize changes in working copy
bzr diff show detailed diffs
bzr merge pull in changes from another branch
bzr commit save some or all changes
bzr log show history of changes
bzr check validate storage
bzr help init more help on e.g. init command
bzr help commands list all commands
"""
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(cmd_object):
"""Return single-line grammar for command.
Only describes arguments, not options.
"""
s = 'bzr ' + cmd_object.name() + ' '
for aname in cmd_object.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):
from bzrlib.commands import get_cmd_object
cmdname = str(cmdname)
if outfile == None:
outfile = sys.stdout
cmd_object = get_cmd_object(cmdname)
doc = cmd_object.help()
if doc == None:
raise NotImplementedError("sorry, no detailed help yet for %r" % cmdname)
print >>outfile, 'usage:', command_usage(cmd_object)
if cmd_object.aliases:
print >>outfile, 'aliases:',
print >>outfile, ', '.join(cmd_object.aliases)
print >>outfile
outfile.write(doc)
if doc[-1] != '\n':
outfile.write('\n')
help_on_command_options(cmd_object, outfile)
def help_on_command_options(cmd, outfile=None):
from bzrlib.option import Option
options = cmd.options()
if not options:
return
if outfile == None:
outfile = sys.stdout
outfile.write('\noptions:\n')
for option_name, option in sorted(options.items()):
l = ' --' + option_name
if option.type is not None:
l += ' ' + option.argname.upper()
short_name = option.short_name()
if short_name:
assert len(short_name) == 1
l += ', -' + short_name
l += (30 - len(l)) * ' ' + option.help
# TODO: split help over multiple lines with correct indenting and
# wrapping
wrapped = textwrap.fill(l, initial_indent='', subsequent_indent=30*' ')
outfile.write(wrapped + '\n')
def help_commands(outfile=None):
"""List all commands"""
from bzrlib.commands import (builtin_command_names,
plugin_command_names,
get_cmd_object)
if outfile == None:
outfile = sys.stdout
names = set() # to eliminate duplicates
names.update(builtin_command_names())
names.update(plugin_command_names())
names = list(names)
names.sort()
for cmd_name in names:
cmd_object = get_cmd_object(cmd_name)
if cmd_object.hidden:
continue
print >>outfile, command_usage(cmd_object)
cmd_help = cmd_object.help()
if cmd_help:
firstline = cmd_help.split('\n', 1)[0]
print >>outfile, ' ' + firstline
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