22
20
# executable files with reasonable names.
24
22
# TODO: `help commands --all` should show hidden commands
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commands as _mod_commands,
37
class NoHelpTopic(errors.BzrError):
39
_fmt = ("No help could be found for '%(topic)s'. "
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"Please use 'brz help topics' to obtain a list of topics.")
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def __init__(self, topic):
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def help(topic=None, outfile=None):
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"""Write the help for the specific topic to outfile"""
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outfile = ui.ui_factory.make_output_stream()
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indices = HelpIndices()
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alias = _mod_commands.get_alias(topic)
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topics = indices.search(topic)
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for index, topic_obj in topics[1:]:
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shadowed_terms.append('%s%s' % (index.prefix,
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topic_obj.get_help_topic()))
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outfile.write(source.get_help_text(shadowed_terms))
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outfile.write("'brz %s' is an alias for 'brz %s'.\n" % (topic,
26
"""Bazaar-NG -- a free distributed version-control tool
27
http://bazaar-vcs.org/
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bzr init makes this directory a versioned branch
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bzr branch make a copy of another branch
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bzr add make files or directories versioned
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bzr ignore ignore a file or pattern
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bzr mv move or rename a versioned file
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bzr status summarize changes in working copy
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bzr diff show detailed diffs
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bzr merge pull in changes from another branch
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bzr commit save some or all changes
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bzr log show history of changes
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bzr check validate storage
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bzr help init more help on e.g. init command
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bzr help commands list all commands
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def help(topic=None, outfile = None):
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outfile.write(global_help)
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elif topic == 'commands':
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help_commands(outfile = outfile)
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help_on_command(topic, outfile = outfile)
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def command_usage(cmd_object):
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"""Return single-line grammar for command.
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Only describes arguments, not options.
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s = 'bzr ' + cmd_object.name() + ' '
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for aname in cmd_object.takes_args:
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if aname[-1] in ['$', '+']:
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aname = aname[:-1] + '...'
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elif aname[-1] == '?':
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aname = '[' + aname[:-1] + ']'
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elif aname[-1] == '*':
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aname = '[' + aname[:-1] + '...]'
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def print_command_plugin(cmd_object, outfile, format):
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"""Print the plugin that provides a command object, if any.
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If the cmd_object is provided by a plugin, prints the plugin name to
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outfile using the provided format string.
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plugin_name = cmd_object.plugin_name()
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if plugin_name is not None:
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out_str = '(From plugin "%s")' % plugin_name
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outfile.write(format % out_str)
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def help_on_command(cmdname, outfile=None):
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from bzrlib.commands import get_cmd_object
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cmdname = str(cmdname)
108
cmd_object = get_cmd_object(cmdname)
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doc = cmd_object.help()
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raise NotImplementedError("sorry, no detailed help yet for %r" % cmdname)
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print >>outfile, 'usage:', command_usage(cmd_object)
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if cmd_object.aliases:
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print >>outfile, 'aliases:',
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print >>outfile, ', '.join(cmd_object.aliases)
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print_command_plugin(cmd_object, outfile, '%s\n\n')
127
help_on_command_options(cmd_object, outfile)
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def help_on_command_options(cmd, outfile=None):
131
from bzrlib.option import Option
132
options = cmd.options()
137
outfile.write('\noptions:\n')
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for option_name, option in sorted(options.items()):
139
l = ' --' + option_name
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if option.type is not None:
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l += ' ' + option.argname.upper()
142
short_name = option.short_name()
144
assert len(short_name) == 1
145
l += ', -' + short_name
146
l += (30 - len(l)) * ' ' + option.help
147
# TODO: split help over multiple lines with correct indenting and
149
wrapped = textwrap.fill(l, initial_indent='', subsequent_indent=30*' ')
150
outfile.write(wrapped + '\n')
71
153
def help_commands(outfile=None):
72
154
"""List all commands"""
74
outfile = ui.ui_factory.make_output_stream()
75
outfile.write(_help_commands_to_text('commands'))
78
def _help_commands_to_text(topic):
79
"""Generate the help text for the list of commands"""
81
if topic == 'hidden-commands':
85
names = list(_mod_commands.all_command_names())
86
commands = ((n, _mod_commands.get_cmd_object(n)) for n in names)
87
shown_commands = [(n, o) for n, o in commands if o.hidden == hidden]
88
max_name = max(len(n) for n, o in shown_commands)
89
indent = ' ' * (max_name + 1)
90
width = osutils.terminal_width()
92
width = osutils.default_terminal_width
93
# we need one extra space for terminals that wrap on last char
96
for cmd_name, cmd_object in sorted(shown_commands):
155
from bzrlib.commands import (builtin_command_names,
156
plugin_command_names,
162
names = set() # to eliminate duplicates
163
names.update(builtin_command_names())
164
names.update(plugin_command_names())
168
for cmd_name in names:
169
cmd_object = get_cmd_object(cmd_name)
170
if cmd_object.hidden:
172
print >>outfile, command_usage(cmd_object)
97
174
plugin_name = cmd_object.plugin_name()
98
if plugin_name is None:
101
plugin_name = ' [%s]' % plugin_name
175
print_command_plugin(cmd_object, outfile, ' %s\n')
103
177
cmd_help = cmd_object.help()
105
179
firstline = cmd_help.split('\n', 1)[0]
108
helpstring = '%-*s %s%s' % (max_name, cmd_name, firstline, plugin_name)
109
lines = utextwrap.wrap(
110
helpstring, subsequent_indent=indent,
112
break_long_words=False)
114
out.append(line + '\n')
118
help_topics.topic_registry.register("commands",
119
_help_commands_to_text,
120
"Basic help for all commands",
121
help_topics.SECT_HIDDEN)
122
help_topics.topic_registry.register("hidden-commands",
123
_help_commands_to_text,
124
"All hidden commands",
125
help_topics.SECT_HIDDEN)
128
class HelpIndices(object):
129
"""Maintainer of help topics across multiple indices.
131
It is currently separate to the HelpTopicRegistry because of its ordered
132
nature, but possibly we should instead structure it as a search within the
133
registry and add ordering and searching facilities to the registry. The
134
registry would probably need to be restructured to support that cleanly
135
which is why this has been implemented in parallel even though it does as a
136
result permit searching for help in indices which are not discoverable via
139
Each index has a unique prefix string, such as "commands", and contains
140
help topics which can be listed or searched.
145
help_topics.HelpTopicIndex(),
146
_mod_commands.HelpCommandIndex(),
147
plugin.PluginsHelpIndex(),
148
help_topics.ConfigOptionHelpIndex(),
151
def _check_prefix_uniqueness(self):
152
"""Ensure that the index collection is able to differentiate safely."""
154
for index in self.search_path:
155
prefix = index.prefix
156
if prefix in prefixes:
157
raise errors.DuplicateHelpPrefix(prefix)
160
def search(self, topic):
161
"""Search for topic across the help search path.
163
:param topic: A string naming the help topic to search for.
164
:raises: NoHelpTopic if none of the indexs in search_path have topic.
165
:return: A list of HelpTopics which matched 'topic'.
167
self._check_prefix_uniqueness()
169
for index in self.search_path:
170
result.extend([(index, _topic)
171
for _topic in index.get_topics(topic)])
173
raise NoHelpTopic(topic)
180
print >>outfile, ' ' + firstline