24
22
# TODO: `help commands --all` should show hidden commands
29
commands as _mod_commands,
39
class NoHelpTopic(errors.BzrError):
41
_fmt = ("No help could be found for '%(topic)s'. "
42
"Please use 'brz help topics' to obtain a list of topics.")
44
def __init__(self, topic):
48
33
def help(topic=None, outfile=None):
49
34
"""Write the help for the specific topic to outfile"""
50
35
if outfile is None:
51
outfile = ui.ui_factory.make_output_stream()
53
indices = HelpIndices()
55
alias = _mod_commands.get_alias(topic)
57
topics = indices.search(topic)
59
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()))
63
outfile.write(source.get_help_text(shadowed_terms))
69
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())
73
121
def help_commands(outfile=None):
74
122
"""List all commands"""
75
123
if outfile is None:
76
outfile = ui.ui_factory.make_output_stream()
77
125
outfile.write(_help_commands_to_text('commands'))
80
128
def _help_commands_to_text(topic):
81
129
"""Generate the help text for the list of commands"""
130
from bzrlib.commands import (builtin_command_names,
131
plugin_command_names,
83
134
if topic == 'hidden-commands':
87
names = list(_mod_commands.all_command_names())
88
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)
89
141
shown_commands = [(n, o) for n, o in commands if o.hidden == hidden]
90
142
max_name = max(len(n) for n, o in shown_commands)
91
143
indent = ' ' * (max_name + 1)
92
width = osutils.terminal_width()
94
width = osutils.default_terminal_width
95
# we need one extra space for terminals that wrap on last char
144
width = osutils.terminal_width() - 1
98
146
for cmd_name, cmd_object in sorted(shown_commands):
99
147
plugin_name = cmd_object.plugin_name()
120
166
help_topics.topic_registry.register("commands",
121
167
_help_commands_to_text,
122
"Basic help for all commands",
123
help_topics.SECT_HIDDEN)
124
help_topics.topic_registry.register("hidden-commands",
168
"Basic help for all commands")
169
help_topics.topic_registry.register("hidden-commands",
125
170
_help_commands_to_text,
126
"All hidden commands",
127
help_topics.SECT_HIDDEN)
130
class HelpIndices(object):
131
"""Maintainer of help topics across multiple indices.
133
It is currently separate to the HelpTopicRegistry because of its ordered
134
nature, but possibly we should instead structure it as a search within the
135
registry and add ordering and searching facilities to the registry. The
136
registry would probably need to be restructured to support that cleanly
137
which is why this has been implemented in parallel even though it does as a
138
result permit searching for help in indices which are not discoverable via
141
Each index has a unique prefix string, such as "commands", and contains
142
help topics which can be listed or searched.
147
help_topics.HelpTopicIndex(),
148
_mod_commands.HelpCommandIndex(),
149
plugin.PluginsHelpIndex(),
150
help_topics.ConfigOptionHelpIndex(),
153
def _check_prefix_uniqueness(self):
154
"""Ensure that the index collection is able to differentiate safely."""
156
for index in self.search_path:
157
prefix = index.prefix
158
if prefix in prefixes:
159
raise errors.DuplicateHelpPrefix(prefix)
162
def search(self, topic):
163
"""Search for topic across the help search path.
165
:param topic: A string naming the help topic to search for.
166
:raises: NoHelpTopic if none of the indexs in search_path have topic.
167
:return: A list of HelpTopics which matched 'topic'.
169
self._check_prefix_uniqueness()
171
for index in self.search_path:
172
result.extend([(index, _topic) for _topic in index.get_topics(topic)])
174
raise NoHelpTopic(topic)
171
"All hidden commands")