20
20
# executable files with reasonable names.
22
22
# TODO: `help commands --all` should show hidden commands
26
"""Bazaar-NG -- a free distributed version-control tool
29
WARNING: This is an unstable development version.
34
bzr init makes this directory a versioned branch
35
bzr branch make a copy of another branch
37
bzr add make files or directories versioned
38
bzr ignore ignore a file or pattern
39
bzr mv move or rename a versioned file
41
bzr status summarize changes in working copy
42
bzr diff show detailed diffs
44
bzr merge pull in changes from another branch
45
bzr commit save some or all changes
47
bzr log show history of changes
48
bzr check validate storage
50
bzr help init more help on e.g. init command
51
bzr help commands list all commands
58
def help(topic=None, outfile = None):
62
outfile.write(global_help)
63
elif topic == 'commands':
64
help_commands(outfile = outfile)
66
help_on_command(topic, outfile = outfile)
69
def command_usage(cmd_object):
70
"""Return single-line grammar for command.
72
Only describes arguments, not options.
74
s = 'bzr ' + cmd_object.name() + ' '
75
for aname in cmd_object.takes_args:
77
if aname[-1] in ['$', '+']:
78
aname = aname[:-1] + '...'
79
elif aname[-1] == '?':
80
aname = '[' + aname[:-1] + ']'
81
elif aname[-1] == '*':
82
aname = '[' + aname[:-1] + '...]'
91
def help_on_command(cmdname, outfile=None):
92
from bzrlib.commands import get_cmd_object
94
cmdname = str(cmdname)
99
cmd_object = get_cmd_object(cmdname)
101
doc = cmd_object.help()
103
raise NotImplementedError("sorry, no detailed help yet for %r" % cmdname)
105
print >>outfile, 'usage:', command_usage(cmd_object)
107
if cmd_object.aliases:
108
print >>outfile, 'aliases:',
109
print >>outfile, ', '.join(cmd_object.aliases)
116
help_on_command_options(cmd_object, outfile)
119
def help_on_command_options(cmd, outfile=None):
120
from bzrlib.option import Option
121
options = cmd.options()
126
outfile.write('\noptions:\n')
127
for option_name, option in sorted(options.items()):
128
l = ' --' + option_name
129
if option.type is not None:
130
l += ' ' + option.argname.upper()
131
short_name = option.short_name()
133
assert len(short_name) == 1
134
l += ', -' + short_name
135
l += (30 - len(l)) * ' ' + option.help
136
# TODO: split help over multiple lines with correct indenting and
138
wrapped = textwrap.fill(l, initial_indent='', subsequent_indent=30*' ')
139
outfile.write(wrapped + '\n')
28
commands as _mod_commands,
37
def help(topic=None, outfile=None):
38
"""Write the help for the specific topic to outfile"""
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,
142
62
def help_commands(outfile=None):
143
63
"""List all commands"""
144
from bzrlib.commands import (builtin_command_names,
145
plugin_command_names,
149
65
outfile = sys.stdout
151
names = set() # to eliminate duplicates
152
names.update(builtin_command_names())
153
names.update(plugin_command_names())
157
for cmd_name in names:
158
cmd_object = get_cmd_object(cmd_name)
159
if cmd_object.hidden:
161
print >>outfile, command_usage(cmd_object)
66
outfile.write(_help_commands_to_text('commands'))
69
def _help_commands_to_text(topic):
70
"""Generate the help text for the list of commands"""
72
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)
79
shown_commands = [(n, o) for n, o in commands if o.hidden == hidden]
80
max_name = max(len(n) for n, o in shown_commands)
81
indent = ' ' * (max_name + 1)
82
width = osutils.terminal_width() - 1
84
for cmd_name, cmd_object in sorted(shown_commands):
85
plugin_name = cmd_object.plugin_name()
86
if plugin_name is None:
89
plugin_name = ' [%s]' % plugin_name
162
91
cmd_help = cmd_object.help()
164
93
firstline = cmd_help.split('\n', 1)[0]
165
print >>outfile, ' ' + firstline
96
helpstring = '%-*s %s%s' % (max_name, cmd_name, firstline, plugin_name)
97
lines = textwrap.wrap(helpstring, subsequent_indent=indent,
100
out.append(line + '\n')
104
help_topics.topic_registry.register("commands",
105
_help_commands_to_text,
106
"Basic help for all commands",
107
help_topics.SECT_HIDDEN)
108
help_topics.topic_registry.register("hidden-commands",
109
_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)