39
35
if outfile is None:
40
36
outfile = sys.stdout
42
indices = HelpIndices()
44
alias = _mod_commands.get_alias(topic)
46
topics = indices.search(topic)
48
for index, topic in topics[1:]:
49
shadowed_terms.append('%s%s' % (index.prefix,
50
topic.get_help_topic()))
51
outfile.write(topics[0][1].get_help_text(shadowed_terms))
52
except errors.NoHelpTopic:
57
outfile.write("'bzr %s' is an alias for 'bzr %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())
61
121
def help_commands(outfile=None):
68
128
def _help_commands_to_text(topic):
69
129
"""Generate the help text for the list of commands"""
130
from bzrlib.commands import (builtin_command_names,
131
plugin_command_names,
71
134
if topic == 'hidden-commands':
75
names = set(_mod_commands.builtin_command_names()) # to eliminate duplicates
76
names.update(_mod_commands.plugin_command_names())
77
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)
78
141
shown_commands = [(n, o) for n, o in commands if o.hidden == hidden]
79
142
max_name = max(len(n) for n, o in shown_commands)
80
143
indent = ' ' * (max_name + 1)
103
166
help_topics.topic_registry.register("commands",
104
167
_help_commands_to_text,
105
"Basic help for all commands",
106
help_topics.SECT_HIDDEN)
107
help_topics.topic_registry.register("hidden-commands",
168
"Basic help for all commands")
169
help_topics.topic_registry.register("hidden-commands",
108
170
_help_commands_to_text,
109
"All hidden commands",
110
help_topics.SECT_HIDDEN)
113
class HelpIndices(object):
114
"""Maintainer of help topics across multiple indices.
116
It is currently separate to the HelpTopicRegistry because of its ordered
117
nature, but possibly we should instead structure it as a search within the
118
registry and add ordering and searching facilities to the registry. The
119
registry would probably need to be restructured to support that cleanly
120
which is why this has been implemented in parallel even though it does as a
121
result permit searching for help in indices which are not discoverable via
124
Each index has a unique prefix string, such as "commands", and contains
125
help topics which can be listed or searched.
130
help_topics.HelpTopicIndex(),
131
_mod_commands.HelpCommandIndex(),
132
plugin.PluginsHelpIndex(),
135
def _check_prefix_uniqueness(self):
136
"""Ensure that the index collection is able to differentiate safely."""
138
for index in self.search_path:
139
prefixes.setdefault(index.prefix, []).append(index)
140
for prefix, indices in prefixes.items():
142
raise errors.DuplicateHelpPrefix(prefix)
144
def search(self, topic):
145
"""Search for topic across the help search path.
147
:param topic: A string naming the help topic to search for.
148
:raises: NoHelpTopic if none of the indexs in search_path have topic.
149
:return: A list of HelpTopics which matched 'topic'.
151
self._check_prefix_uniqueness()
153
for index in self.search_path:
154
result.extend([(index, _topic) for _topic in index.get_topics(topic)])
156
raise errors.NoHelpTopic(topic)
171
"All hidden commands")