22
20
# executable files with reasonable names.
24
22
# TODO: `help commands --all` should show hidden commands
27
commands as _mod_commands,
37
class NoHelpTopic(errors.BzrError):
39
_fmt = ("No help could be found for '%(topic)s'. "
40
"Please use 'brz help topics' to obtain a list of topics.")
42
def __init__(self, topic):
46
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()
51
indices = HelpIndices()
53
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()))
61
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
29
WARNING: This is an unstable development version.
34
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
39
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
51
bzr help commands list all commands
58
def help(topic=None, outfile = None):
62
outfile.write(global_help)
63
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.
74
s = 'bzr ' + cmd_object.name() + ' '
75
for aname in cmd_object.takes_args:
77
if aname[-1] in ['$', '+']:
78
aname = aname[:-1] + '...'
79
elif aname[-1] == '?':
80
aname = '[' + aname[:-1] + ']'
81
elif aname[-1] == '*':
82
aname = '[' + aname[:-1] + '...]'
91
def help_on_command(cmdname, outfile=None):
92
from bzrlib.commands import get_cmd_object
94
cmdname = str(cmdname)
99
cmd_object = get_cmd_object(cmdname)
101
doc = cmd_object.help()
103
raise NotImplementedError("sorry, no detailed help yet for %r" % cmdname)
105
print >>outfile, 'usage:', command_usage(cmd_object)
107
if cmd_object.aliases:
108
print >>outfile, 'aliases:',
109
print >>outfile, ', '.join(cmd_object.aliases)
116
help_on_command_options(cmd_object, outfile)
119
def help_on_command_options(cmd, outfile=None):
120
from bzrlib.option import Option
121
options = cmd.options()
126
outfile.write('\noptions:\n')
127
for option_name, option in sorted(options.items()):
128
l = ' --' + option_name
129
if option.type is not None:
130
l += ' ' + option.argname.upper()
131
short_name = option.short_name()
133
assert len(short_name) == 1
134
l += ', -' + short_name
135
l += (30 - len(l)) * ' ' + option.help
136
# TODO: split help over multiple lines with correct indenting and
138
wrapped = textwrap.fill(l, initial_indent='', subsequent_indent=30*' ')
139
outfile.write(wrapped + '\n')
71
142
def help_commands(outfile=None):
72
143
"""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):
97
plugin_name = cmd_object.plugin_name()
98
if plugin_name is None:
101
plugin_name = ' [%s]' % plugin_name
144
from bzrlib.commands import (builtin_command_names,
145
plugin_command_names,
151
names = set() # to eliminate duplicates
152
names.update(builtin_command_names())
153
names.update(plugin_command_names())
157
for cmd_name in names:
158
cmd_object = get_cmd_object(cmd_name)
159
if cmd_object.hidden:
161
print >>outfile, command_usage(cmd_object)
103
162
cmd_help = cmd_object.help()
105
164
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)
165
print >>outfile, ' ' + firstline