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
28
commands as _mod_commands,
36
def help(topic=None, outfile=None):
37
"""Write the help for the specific topic to outfile"""
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,
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')
61
142
def help_commands(outfile=None):
62
143
"""List all commands"""
144
from bzrlib.commands import (builtin_command_names,
145
plugin_command_names,
64
149
outfile = sys.stdout
65
outfile.write(_help_commands_to_text('commands'))
68
def _help_commands_to_text(topic):
69
"""Generate the help text for the list of commands"""
71
if topic == 'hidden-commands':
75
names = list(_mod_commands.all_command_names())
76
commands = ((n, _mod_commands.get_cmd_object(n)) for n in names)
77
shown_commands = [(n, o) for n, o in commands if o.hidden == hidden]
78
max_name = max(len(n) for n, o in shown_commands)
79
indent = ' ' * (max_name + 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
86
for cmd_name, cmd_object in sorted(shown_commands):
87
plugin_name = cmd_object.plugin_name()
88
if plugin_name is None:
91
plugin_name = ' [%s]' % plugin_name
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)
93
162
cmd_help = cmd_object.help()
95
164
firstline = cmd_help.split('\n', 1)[0]
98
helpstring = '%-*s %s%s' % (max_name, cmd_name, firstline, plugin_name)
99
lines = textwrap.wrap(
100
helpstring, subsequent_indent=indent,
102
break_long_words=False)
104
out.append(line + '\n')
108
help_topics.topic_registry.register("commands",
109
_help_commands_to_text,
110
"Basic help for all commands",
111
help_topics.SECT_HIDDEN)
112
help_topics.topic_registry.register("hidden-commands",
113
_help_commands_to_text,
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(),
140
def _check_prefix_uniqueness(self):
141
"""Ensure that the index collection is able to differentiate safely."""
143
for index in self.search_path:
144
prefixes.setdefault(index.prefix, []).append(index)
145
for prefix, indices in prefixes.items():
147
raise errors.DuplicateHelpPrefix(prefix)
149
def search(self, topic):
150
"""Search for topic across the help search path.
152
:param topic: A string naming the help topic to search for.
153
:raises: NoHelpTopic if none of the indexs in search_path have topic.
154
:return: A list of HelpTopics which matched 'topic'.
156
self._check_prefix_uniqueness()
158
for index in self.search_path:
159
result.extend([(index, _topic) for _topic in index.get_topics(topic)])
161
raise errors.NoHelpTopic(topic)
165
print >>outfile, ' ' + firstline