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
33
def help(topic=None, outfile=None):
47
34
"""Write the help for the specific topic to outfile"""
48
35
if outfile is None:
49
outfile = ui.ui_factory.make_output_stream()
51
indices = HelpIndices()
53
alias = _mod_commands.get_alias(topic)
55
topics = indices.search(topic)
57
for index, topic_obj in topics[1:]:
58
shadowed_terms.append('%s%s' % (index.prefix,
59
topic_obj.get_help_topic()))
61
outfile.write(source.get_help_text(shadowed_terms))
67
outfile.write("'brz %s' is an alias for 'brz %s'.\n" % (topic,
41
if topic in help_topics.topic_registry:
42
txt = help_topics.topic_registry.get_detail(topic)
45
help_on_command(topic, outfile=outfile)
48
def command_usage(cmd_object):
49
"""Return single-line grammar for command.
51
Only describes arguments, not options.
53
s = 'bzr ' + cmd_object.name() + ' '
54
for aname in cmd_object.takes_args:
56
if aname[-1] in ['$', '+']:
57
aname = aname[:-1] + '...'
58
elif aname[-1] == '?':
59
aname = '[' + aname[:-1] + ']'
60
elif aname[-1] == '*':
61
aname = '[' + aname[:-1] + '...]'
70
def print_command_plugin(cmd_object, outfile, format):
71
"""Print the plugin that provides a command object, if any.
73
If the cmd_object is provided by a plugin, prints the plugin name to
74
outfile using the provided format string.
76
plugin_name = cmd_object.plugin_name()
77
if plugin_name is not None:
78
out_str = '(From plugin "%s")' % plugin_name
79
outfile.write(format % out_str)
82
def help_on_command(cmdname, outfile=None):
83
from bzrlib.commands import get_cmd_object
85
cmdname = str(cmdname)
90
cmd_object = get_cmd_object(cmdname)
92
doc = cmd_object.help()
94
raise NotImplementedError("sorry, no detailed help yet for %r" % cmdname)
96
print >>outfile, 'usage:', command_usage(cmd_object)
98
if cmd_object.aliases:
99
print >>outfile, 'aliases:',
100
print >>outfile, ', '.join(cmd_object.aliases)
104
print_command_plugin(cmd_object, outfile, '%s\n\n')
109
help_on_command_options(cmd_object, outfile)
112
def help_on_command_options(cmd, outfile=None):
113
from bzrlib.option import Option, get_optparser
116
options = cmd.options()
118
outfile.write(get_optparser(options).format_option_help())
71
121
def help_commands(outfile=None):
72
122
"""List all commands"""
73
123
if outfile is None:
74
outfile = ui.ui_factory.make_output_stream()
75
125
outfile.write(_help_commands_to_text('commands'))
78
128
def _help_commands_to_text(topic):
79
129
"""Generate the help text for the list of commands"""
130
from bzrlib.commands import (builtin_command_names,
131
plugin_command_names,
81
134
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)
138
names = set(builtin_command_names()) # to eliminate duplicates
139
names.update(plugin_command_names())
140
commands = ((n, get_cmd_object(n)) for n in names)
87
141
shown_commands = [(n, o) for n, o in commands if o.hidden == hidden]
88
142
max_name = max(len(n) for n, o in shown_commands)
89
143
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
144
width = osutils.terminal_width() - 1
96
146
for cmd_name, cmd_object in sorted(shown_commands):
97
147
plugin_name = cmd_object.plugin_name()
118
166
help_topics.topic_registry.register("commands",
119
167
_help_commands_to_text,
120
"Basic help for all commands",
121
help_topics.SECT_HIDDEN)
122
help_topics.topic_registry.register("hidden-commands",
168
"Basic help for all commands")
169
help_topics.topic_registry.register("hidden-commands",
123
170
_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)
171
"All hidden commands")