13
13
# You should have received a copy of the GNU General Public License
14
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17
17
# TODO: Some way to get a list of external commands (defined by shell
18
18
# scripts) so that they can be included in the help listing as well.
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()))
52
outfile.write(source.get_help_text(shadowed_terms))
53
except errors.NoHelpTopic:
58
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())
62
121
def help_commands(outfile=None):
69
128
def _help_commands_to_text(topic):
70
129
"""Generate the help text for the list of commands"""
130
from bzrlib.commands import (builtin_command_names,
131
plugin_command_names,
72
134
if topic == 'hidden-commands':
76
names = set(_mod_commands.builtin_command_names()) # to eliminate duplicates
77
names.update(_mod_commands.plugin_command_names())
78
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)
79
141
shown_commands = [(n, o) for n, o in commands if o.hidden == hidden]
80
142
max_name = max(len(n) for n, o in shown_commands)
81
143
indent = ' ' * (max_name + 1)
104
166
help_topics.topic_registry.register("commands",
105
167
_help_commands_to_text,
106
"Basic help for all commands",
107
help_topics.SECT_HIDDEN)
108
help_topics.topic_registry.register("hidden-commands",
168
"Basic help for all commands")
169
help_topics.topic_registry.register("hidden-commands",
109
170
_help_commands_to_text,
110
"All hidden commands",
111
help_topics.SECT_HIDDEN)
114
class HelpIndices(object):
115
"""Maintainer of help topics across multiple indices.
117
It is currently separate to the HelpTopicRegistry because of its ordered
118
nature, but possibly we should instead structure it as a search within the
119
registry and add ordering and searching facilities to the registry. The
120
registry would probably need to be restructured to support that cleanly
121
which is why this has been implemented in parallel even though it does as a
122
result permit searching for help in indices which are not discoverable via
125
Each index has a unique prefix string, such as "commands", and contains
126
help topics which can be listed or searched.
131
help_topics.HelpTopicIndex(),
132
_mod_commands.HelpCommandIndex(),
133
plugin.PluginsHelpIndex(),
136
def _check_prefix_uniqueness(self):
137
"""Ensure that the index collection is able to differentiate safely."""
139
for index in self.search_path:
140
prefixes.setdefault(index.prefix, []).append(index)
141
for prefix, indices in prefixes.items():
143
raise errors.DuplicateHelpPrefix(prefix)
145
def search(self, topic):
146
"""Search for topic across the help search path.
148
:param topic: A string naming the help topic to search for.
149
:raises: NoHelpTopic if none of the indexs in search_path have topic.
150
:return: A list of HelpTopics which matched 'topic'.
152
self._check_prefix_uniqueness()
154
for index in self.search_path:
155
result.extend([(index, _topic) for _topic in index.get_topics(topic)])
157
raise errors.NoHelpTopic(topic)
171
"All hidden commands")