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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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.
35
38
if outfile is None:
36
39
outfile = sys.stdout
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())
41
indices = HelpIndices()
43
alias = _mod_commands.get_alias(topic)
45
topics = indices.search(topic)
47
for index, topic_obj in topics[1:]:
48
shadowed_terms.append('%s%s' % (index.prefix,
49
topic_obj.get_help_topic()))
51
outfile.write(source.get_help_text(shadowed_terms))
52
except errors.NoHelpTopic:
57
outfile.write("'bzr %s' is an alias for 'bzr %s'.\n" % (topic,
121
61
def help_commands(outfile=None):
128
68
def _help_commands_to_text(topic):
129
69
"""Generate the help text for the list of commands"""
130
from bzrlib.commands import (builtin_command_names,
131
plugin_command_names,
134
71
if topic == 'hidden-commands':
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)
75
names = list(_mod_commands.all_command_names())
76
commands = ((n, _mod_commands.get_cmd_object(n)) for n in names)
141
77
shown_commands = [(n, o) for n, o in commands if o.hidden == hidden]
142
78
max_name = max(len(n) for n, o in shown_commands)
143
79
indent = ' ' * (max_name + 1)
144
width = osutils.terminal_width() - 1
80
width = osutils.terminal_width()
82
width = osutils.default_terminal_width
83
# we need one extra space for terminals that wrap on last char
146
86
for cmd_name, cmd_object in sorted(shown_commands):
147
87
plugin_name = cmd_object.plugin_name()
166
108
help_topics.topic_registry.register("commands",
167
109
_help_commands_to_text,
168
"Basic help for all commands")
169
help_topics.topic_registry.register("hidden-commands",
110
"Basic help for all commands",
111
help_topics.SECT_HIDDEN)
112
help_topics.topic_registry.register("hidden-commands",
170
113
_help_commands_to_text,
171
"All hidden commands")
114
"All hidden commands",
115
help_topics.SECT_HIDDEN)
118
class HelpIndices(object):
119
"""Maintainer of help topics across multiple indices.
121
It is currently separate to the HelpTopicRegistry because of its ordered
122
nature, but possibly we should instead structure it as a search within the
123
registry and add ordering and searching facilities to the registry. The
124
registry would probably need to be restructured to support that cleanly
125
which is why this has been implemented in parallel even though it does as a
126
result permit searching for help in indices which are not discoverable via
129
Each index has a unique prefix string, such as "commands", and contains
130
help topics which can be listed or searched.
135
help_topics.HelpTopicIndex(),
136
_mod_commands.HelpCommandIndex(),
137
plugin.PluginsHelpIndex(),
138
help_topics.ConfigOptionHelpIndex(),
141
def _check_prefix_uniqueness(self):
142
"""Ensure that the index collection is able to differentiate safely."""
144
for index in self.search_path:
145
prefixes.setdefault(index.prefix, []).append(index)
146
for prefix, indices in prefixes.items():
148
raise errors.DuplicateHelpPrefix(prefix)
150
def search(self, topic):
151
"""Search for topic across the help search path.
153
:param topic: A string naming the help topic to search for.
154
:raises: NoHelpTopic if none of the indexs in search_path have topic.
155
:return: A list of HelpTopics which matched 'topic'.
157
self._check_prefix_uniqueness()
159
for index in self.search_path:
160
result.extend([(index, _topic) for _topic in index.get_topics(topic)])
162
raise errors.NoHelpTopic(topic)