24
26
# TODO: Specific "examples" property on commands for consistent formatting.
28
# TODO: "--profile=cum", to change sort order. Is there any value in leaving
29
# the profile output behind so it can be interactively examined?
35
from .lazy_import import lazy_import
36
lazy_import(globals(), """
33
from warnings import warn
49
from .hooks import Hooks
50
from .i18n import gettext
51
# Compatibility - Option used to be in commands.
52
from .option import Option
53
from .plugin import disable_plugins, load_plugins, plugin_name
54
from . import errors, registry
60
class BzrOptionError(errors.BzrCommandError):
62
_fmt = "Error in command line options"
65
class CommandAvailableInPlugin(Exception):
67
internal_error = False
69
def __init__(self, cmd_name, plugin_metadata, provider):
71
self.plugin_metadata = plugin_metadata
72
self.cmd_name = cmd_name
73
self.provider = provider
77
_fmt = ('"%s" is not a standard brz command. \n'
78
'However, the following official plugin provides this command: %s\n'
79
'You can install it by going to: %s'
80
% (self.cmd_name, self.plugin_metadata['name'],
81
self.plugin_metadata['url']))
86
class CommandInfo(object):
87
"""Information about a command."""
89
def __init__(self, aliases):
90
"""The list of aliases for the command."""
91
self.aliases = aliases
94
def from_command(klass, command):
95
"""Factory to construct a CommandInfo from a command."""
96
return klass(command.aliases)
99
class CommandRegistry(registry.Registry):
100
"""Special registry mapping command names to command classes.
102
:ivar overridden_registry: Look in this registry for commands being
103
overridden by this registry. This can be used to tell plugin commands
104
about the builtin they're decorating.
108
registry.Registry.__init__(self)
109
self.overridden_registry = None
110
# map from aliases to the real command that implements the name
111
self._alias_dict = {}
113
def get(self, command_name):
114
real_name = self._alias_dict.get(command_name, command_name)
115
return registry.Registry.get(self, real_name)
118
def _get_name(command_name):
119
if command_name.startswith("cmd_"):
120
return _unsquish_command_name(command_name)
124
def register(self, cmd, decorate=False):
125
"""Utility function to help register a command
127
:param cmd: Command subclass to register
128
:param decorate: If true, allow overriding an existing command
129
of the same name; the old command is returned by this function.
130
Otherwise it is an error to try to override an existing command.
133
k_unsquished = self._get_name(k)
135
previous = self.get(k_unsquished)
138
if self.overridden_registry:
140
previous = self.overridden_registry.get(k_unsquished)
143
info = CommandInfo.from_command(cmd)
145
registry.Registry.register(self, k_unsquished, cmd,
146
override_existing=decorate, info=info)
148
trace.warning('Two plugins defined the same command: %r' % k)
149
trace.warning('Not loading the one in %r' %
150
sys.modules[cmd.__module__])
151
trace.warning('Previously this command was registered from %r' %
152
sys.modules[previous.__module__])
153
for a in cmd.aliases:
154
self._alias_dict[a] = k_unsquished
157
def register_lazy(self, command_name, aliases, module_name):
158
"""Register a command without loading its module.
160
:param command_name: The primary name of the command.
161
:param aliases: A list of aliases for the command.
162
:module_name: The module that the command lives in.
164
key = self._get_name(command_name)
165
registry.Registry.register_lazy(self, key, module_name, command_name,
166
info=CommandInfo(aliases))
168
self._alias_dict[a] = key
171
plugin_cmds = CommandRegistry()
172
builtin_command_registry = CommandRegistry()
173
plugin_cmds.overridden_registry = builtin_command_registry
38
from bzrlib.errors import (BzrError,
43
from bzrlib.option import Option
44
from bzrlib.revisionspec import RevisionSpec
45
from bzrlib.symbol_versioning import *
47
from bzrlib.trace import mutter, note, log_error, warning, be_quiet
176
52
def register_command(cmd, decorate=False):
177
"""Register a plugin command.
53
"""Utility function to help register a command
179
Should generally be avoided in favor of lazy registration.
55
:param cmd: Command subclass to register
56
:param decorate: If true, allow overriding an existing command
57
of the same name; the old command is returned by this function.
58
Otherwise it is an error to try to override an existing command.
181
60
global plugin_cmds
182
return plugin_cmds.register(cmd, decorate)
62
if k.startswith("cmd_"):
63
k_unsquished = _unsquish_command_name(k)
66
if not plugin_cmds.has_key(k_unsquished):
67
plugin_cmds[k_unsquished] = cmd
68
mutter('registered plugin command %s', k_unsquished)
69
if decorate and k_unsquished in builtin_command_names():
70
return _builtin_commands()[k_unsquished]
72
result = plugin_cmds[k_unsquished]
73
plugin_cmds[k_unsquished] = cmd
76
log_error('Two plugins defined the same command: %r' % k)
77
log_error('Not loading the one in %r' % sys.modules[cmd.__module__])
185
80
def _squish_command_name(cmd):
189
84
def _unsquish_command_name(cmd):
190
return cmd[4:].replace('_', '-')
193
def _register_builtin_commands():
194
if builtin_command_registry.keys():
197
import breezy.builtins
198
for cmd_class in _scan_module_for_commands(breezy.builtins):
199
builtin_command_registry.register(cmd_class)
200
breezy.builtins._register_lazy_builtins()
203
def _scan_module_for_commands(module):
204
module_dict = module.__dict__
205
for name in module_dict:
85
assert cmd.startswith("cmd_")
86
return cmd[4:].replace('_','-')
89
def _builtin_commands():
90
import bzrlib.builtins
92
builtins = bzrlib.builtins.__dict__
206
94
if name.startswith("cmd_"):
207
yield module_dict[name]
210
def _list_bzr_commands(names):
211
"""Find commands from bzr's core and plugins.
213
This is not the public interface, just the default hook called by
216
# to eliminate duplicates
217
names.update(builtin_command_names())
218
names.update(plugin_command_names())
222
def all_command_names():
223
"""Return a set of all command names."""
225
for hook in Command.hooks['list_commands']:
228
raise AssertionError(
229
'hook %s returned None' % Command.hooks.get_hook_name(hook))
95
real_name = _unsquish_command_name(name)
96
r[real_name] = builtins[name]
233
100
def builtin_command_names():
234
"""Return list of builtin command names.
236
Use of all_command_names() is encouraged rather than builtin_command_names
237
and/or plugin_command_names.
239
_register_builtin_commands()
240
return builtin_command_registry.keys()
101
"""Return list of builtin command names."""
102
return _builtin_commands().keys()
243
105
def plugin_command_names():
244
"""Returns command names from commands registered by plugins."""
245
106
return plugin_cmds.keys()
248
# Overrides for common mispellings that heuristics get wrong
250
'ic': {'ci': 0}, # heuristic finds nick
254
def guess_command(cmd_name):
255
"""Guess what command a user typoed.
257
:param cmd_name: Command to search for
258
:return: None if no command was found, name of a command otherwise
261
for name in all_command_names():
263
cmd = get_cmd_object(name)
264
names.update(cmd.aliases)
265
# candidate: modified levenshtein distance against cmd_name.
268
for name in sorted(names):
269
matcher = patiencediff.PatienceSequenceMatcher(None, cmd_name, name)
271
opcodes = matcher.get_opcodes()
272
for opcode, l1, l2, r1, r2 in opcodes:
273
if opcode == 'delete':
275
elif opcode == 'replace':
276
distance += max(l2 - l1, r2 - l1)
277
elif opcode == 'insert':
279
elif opcode == 'equal':
280
# Score equal ranges lower, making similar commands of equal
281
# length closer than arbitrary same length commands.
282
distance -= 0.1 * (l2 - l1)
283
costs[name] = distance
284
costs.update(_GUESS_OVERRIDES.get(cmd_name, {}))
285
costs = sorted((costs[key], key) for key in costs)
290
candidate = costs[0][1]
109
def _get_cmd_dict(plugins_override=True):
110
"""Return name->class mapping for all commands."""
111
d = _builtin_commands()
113
d.update(plugin_cmds)
117
def get_all_cmds(plugins_override=True):
118
"""Return canonical name and class for all registered commands."""
119
for k, v in _get_cmd_dict(plugins_override=plugins_override).iteritems():
294
123
def get_cmd_object(cmd_name, plugins_override=True):
295
"""Return the command object for a command.
124
"""Return the canonical name and command class for a command.
298
127
If true, plugin commands can override builtins.
301
return _get_cmd_object(cmd_name, plugins_override)
303
# No command found, see if this was a typo
304
candidate = guess_command(cmd_name)
305
if candidate is not None:
306
raise errors.BzrCommandError(
307
gettext('unknown command "%s". Perhaps you meant "%s"')
308
% (cmd_name, candidate))
309
raise errors.BzrCommandError(gettext('unknown command "%s"')
313
def _get_cmd_object(cmd_name, plugins_override=True, check_missing=True):
314
"""Get a command object.
316
:param cmd_name: The name of the command.
317
:param plugins_override: Allow plugins to override builtins.
318
:param check_missing: Look up commands not found in the regular index via
319
the get_missing_command hook.
320
:return: A Command object instance
321
:raises KeyError: If no command is found.
323
# We want only 'ascii' command names, but the user may have typed
324
# in a Unicode name. In that case, they should just get a
325
# 'command not found' error later.
326
# In the future, we may actually support Unicode command names.
329
for hook in Command.hooks['get_command']:
330
cmd = hook(cmd, cmd_name)
331
if cmd is not None and not plugins_override and not cmd.plugin_name():
332
# We've found a non-plugin command, don't permit it to be
335
if cmd is None and check_missing:
336
for hook in Command.hooks['get_missing_command']:
343
# Allow plugins to extend commands
344
for hook in Command.hooks['extend_command']:
346
if getattr(cmd, 'invoked_as', None) is None:
347
cmd.invoked_as = cmd_name
351
class NoPluginAvailable(errors.BzrError):
355
def _try_plugin_provider(cmd_name):
356
"""Probe for a plugin provider having cmd_name."""
358
plugin_metadata, provider = probe_for_provider(cmd_name)
359
raise CommandAvailableInPlugin(cmd_name, plugin_metadata, provider)
360
except NoPluginAvailable:
364
def probe_for_provider(cmd_name):
365
"""Look for a provider for cmd_name.
367
:param cmd_name: The command name.
368
:return: plugin_metadata, provider for getting cmd_name.
369
:raises NoPluginAvailable: When no provider can supply the plugin.
371
# look for providers that provide this command but aren't installed
372
for provider in command_providers_registry:
374
return provider.plugin_for_command(cmd_name), provider
375
except NoPluginAvailable:
377
raise NoPluginAvailable(cmd_name)
380
def _get_bzr_command(cmd_or_None, cmd_name):
381
"""Get a command from bzr's core."""
383
cmd_class = builtin_command_registry.get(cmd_name)
391
def _get_external_command(cmd_or_None, cmd_name):
392
"""Lookup a command that is a shell script."""
393
# Only do external command lookups when no command is found so far.
394
if cmd_or_None is not None:
396
from breezy.externalcommand import ExternalCommand
129
from bzrlib.externalcommand import ExternalCommand
131
cmd_name = str(cmd_name) # not unicode
133
# first look up this command under the specified name
134
cmds = _get_cmd_dict(plugins_override=plugins_override)
136
return cmds[cmd_name]()
140
# look for any command which claims this as an alias
141
for real_cmd_name, cmd_class in cmds.iteritems():
142
if cmd_name in cmd_class.aliases:
397
145
cmd_obj = ExternalCommand.find_command(cmd_name)
402
def _get_plugin_command(cmd_or_None, cmd_name):
403
"""Get a command from brz's plugins."""
405
return plugin_cmds.get(cmd_name)()
408
for key in plugin_cmds.keys():
409
info = plugin_cmds.get_info(key)
410
if cmd_name in info.aliases:
411
return plugin_cmds.get(key)()
149
raise BzrCommandError("unknown command %r" % cmd_name)
415
152
class Command(object):
416
153
"""Base class for commands.
418
Commands are the heart of the command-line brz interface.
155
Commands are the heart of the command-line bzr interface.
420
157
The command object mostly handles the mapping of command-line
421
parameters into one or more breezy operations, and of the results
158
parameters into one or more bzrlib operations, and of the results
422
159
into textual output.
424
161
Commands normally don't have any state. All their arguments are
430
167
summary, then a complete description of the command. A grammar
431
168
description will be inserted.
433
:cvar aliases: Other accepted names for this command.
435
:cvar takes_args: List of argument forms, marked with whether they are
436
optional, repeated, etc. Examples::
438
['to_location', 'from_branch?', 'file*']
440
* 'to_location' is required
441
* 'from_branch' is optional
442
* 'file' can be specified 0 or more times
444
:cvar takes_options: List of options that may be given for this command.
445
These can be either strings, referring to globally-defined options, or
446
option objects. Retrieve through options().
448
:cvar hidden: If true, this command isn't advertised. This is typically
171
Other accepted names for this command.
174
List of argument forms, marked with whether they are optional,
179
['to_location', 'from_branch?', 'file*']
181
'to_location' is required
182
'from_branch' is optional
183
'file' can be specified 0 or more times
186
List of options that may be given for this command. These can
187
be either strings, referring to globally-defined options,
188
or option objects. Retrieve through options().
191
If true, this command isn't advertised. This is typically
449
192
for commands intended for expert users.
451
:cvar encoding_type: Command objects will get a 'outf' attribute, which has
452
been setup to properly handle encoding of unicode strings.
453
encoding_type determines what will happen when characters cannot be
456
* strict - abort if we cannot decode
457
* replace - put in a bogus character (typically '?')
458
* exact - do not encode sys.stdout
460
NOTE: by default on Windows, sys.stdout is opened as a text stream,
461
therefore LF line-endings are converted to CRLF. When a command uses
462
encoding_type = 'exact', then sys.stdout is forced to be a binary
463
stream, and line-endings will not mangled.
466
A string indicating the real name under which this command was
467
invoked, before expansion of aliases.
468
(This may be None if the command was constructed and run in-process.)
470
:cvar hooks: An instance of CommandHooks.
472
:cvar __doc__: The help shown by 'brz help command' for this command.
473
This is set by assigning explicitly to __doc__ so that -OO can
477
__doc__ = "My help goes here"
195
Command objects will get a 'outf' attribute, which has been
196
setup to properly handle encoding of unicode strings.
197
encoding_type determines what will happen when characters cannot
199
strict - abort if we cannot decode
200
replace - put in a bogus character (typically '?')
201
exact - do not encode sys.stdout
481
206
takes_options = []
482
207
encoding_type = 'strict'
488
211
def __init__(self):
489
212
"""Construct an instance of this command."""
490
# List of standard options directly supported
491
self.supported_std_options = []
494
def add_cleanup(self, cleanup_func, *args, **kwargs):
495
"""Register a function to call after self.run returns or raises.
497
Functions will be called in LIFO order.
499
self._exit_stack.callback(cleanup_func, *args, **kwargs)
501
def cleanup_now(self):
502
"""Execute and empty pending cleanup functions immediately.
504
After cleanup_now all registered cleanups are forgotten. add_cleanup
505
may be called again after cleanup_now; these cleanups will be called
506
after self.run returns or raises (or when cleanup_now is next called).
508
This is useful for releasing expensive or contentious resources (such
509
as write locks) before doing further work that does not require those
510
resources (such as writing results to self.outf). Note though, that
511
as it releases all resources, this may release locks that the command
512
wants to hold, so use should be done with care.
514
self._exit_stack.close()
516
def enter_context(self, cm):
517
return self._exit_stack.enter_context(cm)
520
"""Return single-line grammar for this command.
522
Only describes arguments, not options.
524
s = 'brz ' + self.name() + ' '
525
for aname in self.takes_args:
526
aname = aname.upper()
527
if aname[-1] in ['$', '+']:
528
aname = aname[:-1] + '...'
529
elif aname[-1] == '?':
530
aname = '[' + aname[:-1] + ']'
531
elif aname[-1] == '*':
532
aname = '[' + aname[:-1] + '...]'
534
s = s[:-1] # remove last space
537
def get_help_text(self, additional_see_also=None, plain=True,
538
see_also_as_links=False, verbose=True):
539
"""Return a text string with help for this command.
541
:param additional_see_also: Additional help topics to be
543
:param plain: if False, raw help (reStructuredText) is
544
returned instead of plain text.
545
:param see_also_as_links: if True, convert items in 'See also'
546
list to internal links (used by bzr_man rstx generator)
547
:param verbose: if True, display the full help, otherwise
548
leave out the descriptive sections and just display
549
usage help (e.g. Purpose, Usage, Options) with a
550
message explaining how to obtain full help.
553
i18n.install() # Install i18n only for get_help_text for now.
556
# Note: If self.gettext() translates ':Usage:\n', the section will
557
# be shown after "Description" section and we don't want to
558
# translate the usage string.
559
# Though, brz export-pot don't exports :Usage: section and it must
561
doc = self.gettext(doc)
563
doc = gettext("No help for this command.")
565
# Extract the summary (purpose) and sections out from the text
566
purpose, sections, order = self._get_help_parts(doc)
568
# If a custom usage section was provided, use it
569
if 'Usage' in sections:
570
usage = sections.pop('Usage')
572
usage = self._usage()
574
# The header is the purpose and usage
576
result += gettext(':Purpose: %s\n') % (purpose,)
577
if usage.find('\n') >= 0:
578
result += gettext(':Usage:\n%s\n') % (usage,)
580
result += gettext(':Usage: %s\n') % (usage,)
585
# XXX: optparse implicitly rewraps the help, and not always perfectly,
586
# so we get <https://bugs.launchpad.net/bzr/+bug/249908>. -- mbp
588
parser = option.get_optparser(
589
[v for k, v in sorted(self.options().items())])
590
options = parser.format_option_help()
591
# FIXME: According to the spec, ReST option lists actually don't
592
# support options like --1.14 so that causes syntax errors (in Sphinx
593
# at least). As that pattern always appears in the commands that
594
# break, we trap on that and then format that block of 'format' options
595
# as a literal block. We use the most recent format still listed so we
596
# don't have to do that too often -- vila 20110514
597
if not plain and options.find(' --1.14 ') != -1:
598
options = options.replace(' format:\n', ' format::\n\n', 1)
599
if options.startswith('Options:'):
600
result += gettext(':Options:%s') % (options[len('options:'):],)
606
# Add the description, indenting it 2 spaces
607
# to match the indentation of the options
609
text = sections.pop(None)
610
text = '\n '.join(text.splitlines())
611
result += gettext(':Description:\n %s\n\n') % (text,)
613
# Add the custom sections (e.g. Examples). Note that there's no need
614
# to indent these as they must be indented already in the source.
617
if label in sections:
618
result += ':%s:\n%s\n' % (label, sections[label])
621
result += (gettext("See brz help %s for more details and examples.\n\n")
624
# Add the aliases, source (plug-in) and see also links, if any
626
result += gettext(':Aliases: ')
627
result += ', '.join(self.aliases) + '\n'
628
plugin_name = self.plugin_name()
629
if plugin_name is not None:
630
result += gettext(':From: plugin "%s"\n') % plugin_name
631
see_also = self.get_see_also(additional_see_also)
633
if not plain and see_also_as_links:
635
for item in see_also:
637
# topics doesn't have an independent section
638
# so don't create a real link
639
see_also_links.append(item)
641
# Use a Sphinx link for this entry
642
link_text = gettext(":doc:`{0} <{1}-help>`").format(
644
see_also_links.append(link_text)
645
see_also = see_also_links
646
result += gettext(':See also: %s') % ', '.join(see_also) + '\n'
648
# If this will be rendered as plain text, convert it
650
import breezy.help_topics
651
result = breezy.help_topics.help_as_plain_text(result)
655
def _get_help_parts(text):
656
"""Split help text into a summary and named sections.
658
:return: (summary,sections,order) where summary is the top line and
659
sections is a dictionary of the rest indexed by section name.
660
order is the order the section appear in the text.
661
A section starts with a heading line of the form ":xxx:".
662
Indented text on following lines is the section value.
663
All text found outside a named section is assigned to the
664
default section which is given the key of None.
666
def save_section(sections, order, label, section):
668
if label in sections:
669
sections[label] += '\n' + section
672
sections[label] = section
674
lines = text.rstrip().splitlines()
675
summary = lines.pop(0)
678
label, section = None, ''
680
if line.startswith(':') and line.endswith(':') and len(line) > 2:
681
save_section(sections, order, label, section)
682
label, section = line[1:-1], ''
683
elif (label is not None and len(line) > 1 and
684
not line[0].isspace()):
685
save_section(sections, order, label, section)
686
label, section = None, line
689
section += '\n' + line
692
save_section(sections, order, label, section)
693
return summary, sections, order
695
def get_help_topic(self):
696
"""Return the commands help topic - its name."""
699
def get_see_also(self, additional_terms=None):
700
"""Return a list of help topics that are related to this command.
702
The list is derived from the content of the _see_also attribute. Any
703
duplicates are removed and the result is in lexical order.
704
:param additional_terms: Additional help topics to cross-reference.
705
:return: A list of help topics.
707
see_also = set(getattr(self, '_see_also', []))
709
see_also.update(additional_terms)
710
return sorted(see_also)
213
if self.__doc__ == Command.__doc__:
214
warn("No help message set for %r" % self)
712
216
def options(self):
713
217
"""Return dict of valid options for this command.
715
219
Maps from long option name to option object."""
716
r = Option.STD_OPTIONS.copy()
221
r['help'] = Option.OPTIONS['help']
718
222
for o in self.takes_options:
719
if isinstance(o, string_types):
720
o = option.Option.OPTIONS[o]
223
if not isinstance(o, Option):
224
o = Option.OPTIONS[o]
722
if o.name in std_names:
723
self.supported_std_options.append(o.name)
726
def _setup_outf(self):
228
def _setup_stdout(self):
727
229
"""Return a file linked to stdout, which has proper encoding."""
728
self.outf = ui.ui_factory.make_output_stream(
729
encoding_type=self.encoding_type)
230
assert self.encoding_type in ['strict', 'exact', 'replace']
232
# Originally I was using self.stdout, but that looks
233
# *way* too much like sys.stdout
234
if self.encoding_type == 'exact':
235
self.outf = sys.stdout
238
output_encoding = getattr(sys.stdout, 'encoding', None)
239
if not output_encoding:
240
output_encoding = bzrlib.user_encoding
241
mutter('encoding stdout bzrlib.user_encoding %r', output_encoding)
243
mutter('encoding stdout log as sys.stdout encoding %r', output_encoding)
245
# use 'replace' so that we don't abort if trying to write out
246
# in e.g. the default C locale.
247
self.outf = codecs.getwriter(output_encoding)(sys.stdout, errors=self.encoding_type)
249
@deprecated_method(zero_eight)
250
def run_argv(self, argv):
251
"""Parse command line and run.
253
See run_argv_aliases for the 0.8 and beyond api.
255
return self.run_argv_aliases(argv)
731
257
def run_argv_aliases(self, argv, alias_argv=None):
732
258
"""Parse the command line and run with extra aliases in alias_argv."""
733
259
args, opts = parse_args(self, argv, alias_argv)
736
# Process the standard options
737
if 'help' in opts: # e.g. brz add --help
738
self.outf.write(self.get_help_text())
740
if 'usage' in opts: # e.g. brz add --usage
741
self.outf.write(self.get_help_text(verbose=False))
743
trace.set_verbosity_level(option._verbosity_level)
744
if 'verbose' in self.supported_std_options:
745
opts['verbose'] = trace.is_verbose()
746
elif 'verbose' in opts:
748
if 'quiet' in self.supported_std_options:
749
opts['quiet'] = trace.is_quiet()
750
elif 'quiet' in opts:
260
if 'help' in opts: # e.g. bzr add --help
261
from bzrlib.help import help_on_command
262
help_on_command(self.name())
264
# XXX: This should be handled by the parser
265
allowed_names = self.options().keys()
267
if oname not in allowed_names:
268
raise BzrCommandError("option '--%s' is not allowed for"
269
" command %r" % (oname, self.name()))
752
270
# mix arguments and options into one dictionary
753
271
cmdargs = _match_argform(self.name(), self.takes_args, args)
822
301
return getdoc(self)
824
def gettext(self, message):
825
"""Returns the gettext function used to translate this command's help.
827
Commands provided by plugins should override this to use their
830
return i18n.gettext_per_paragraph(message)
833
"""Return the canonical name for this command.
835
The name under which it was actually invoked is available in invoked_as
837
304
return _unsquish_command_name(self.__class__.__name__)
839
def plugin_name(self):
840
"""Get the name of the plugin that provides this command.
842
:return: The name of the plugin or None if the command is builtin.
844
return plugin_name(self.__module__)
847
class CommandHooks(Hooks):
848
"""Hooks related to Command object creation/enumeration."""
851
"""Create the default hooks.
853
These are all empty initially, because by default nothing should get
856
Hooks.__init__(self, "breezy.commands", "Command.hooks")
859
"Called after creating a command object to allow modifications "
860
"such as adding or removing options, docs etc. Called with the "
861
"new breezy.commands.Command object.", (1, 13))
864
"Called when creating a single command. Called with "
865
"(cmd_or_None, command_name). get_command should either return "
866
"the cmd_or_None parameter, or a replacement Command object that "
867
"should be used for the command. Note that the Command.hooks "
868
"hooks are core infrastructure. Many users will prefer to use "
869
"breezy.commands.register_command or plugin_cmds.register_lazy.",
872
'get_missing_command',
873
"Called when creating a single command if no command could be "
874
"found. Called with (command_name). get_missing_command should "
875
"either return None, or a Command object to be used for the "
879
"Called when enumerating commands. Called with a set of "
880
"cmd_name strings for all the commands found so far. This set "
881
" is safe to mutate - e.g. to remove a command. "
882
"list_commands should return the updated set of command names.",
886
"Called prior to executing a command. Called with the command "
890
"Called after executing a command. Called with the command "
894
Command.hooks = CommandHooks()
307
def parse_spec(spec):
313
>>> parse_spec("../@")
315
>>> parse_spec("../f/@35")
317
>>> parse_spec('./@revid:john@arbash-meinel.com-20050711044610-3ca0327c6a222f67')
318
['.', 'revid:john@arbash-meinel.com-20050711044610-3ca0327c6a222f67']
323
parsed = spec.split('/@')
324
assert len(parsed) == 2
329
parsed[1] = int(parsed[1])
331
pass # We can allow stuff like ./@revid:blahblahblah
335
parsed = [spec, None]
897
338
def parse_args(command, argv, alias_argv=None):
898
339
"""Parse command line.
900
341
Arguments and options are parsed at this level before being passed
901
342
down to specific command handlers. This routine knows, from a
902
343
lookup table, something about the available options, what optargs
903
344
they take, and which commands will accept them.
905
# TODO: make it a method of the Command?
906
parser = option.get_optparser(
907
[v for k, v in sorted(command.options().items())])
908
if alias_argv is not None:
909
args = alias_argv + argv
913
# python 2's optparse raises this exception if a non-ascii
914
# option name is given. See http://bugs.python.org/issue2931
916
options, args = parser.parse_args(args)
917
except UnicodeEncodeError:
918
raise errors.BzrCommandError(
919
gettext('Only ASCII permitted in option names'))
921
opts = dict((k, v) for k, v in options.__dict__.items() if
922
v is not option.OptionParser.DEFAULT_VALUE)
346
# TODO: chop up this beast; make it a method of the Command
351
cmd_options = command.options()
353
proc_aliasarg = True # Are we processing alias_argv now?
354
for proc_argv in alias_argv, argv:
361
# We've received a standalone -- No more flags
365
# option names must not be unicode
369
mutter(" got option %r", a)
371
optname, optarg = a[2:].split('=', 1)
374
if optname not in cmd_options:
375
raise BzrOptionError('unknown long option %r for'
380
if shortopt in Option.SHORT_OPTIONS:
381
# Multi-character options must have a space to delimit
383
# ^^^ what does this mean? mbp 20051014
384
optname = Option.SHORT_OPTIONS[shortopt].name
386
# Single character short options, can be chained,
387
# and have their value appended to their name
389
if shortopt not in Option.SHORT_OPTIONS:
390
# We didn't find the multi-character name, and we
391
# didn't find the single char name
392
raise BzrError('unknown short option %r' % a)
393
optname = Option.SHORT_OPTIONS[shortopt].name
396
# There are extra things on this option
397
# see if it is the value, or if it is another
399
optargfn = Option.OPTIONS[optname].type
401
# This option does not take an argument, so the
402
# next entry is another short option, pack it
404
proc_argv.insert(0, '-' + a[2:])
406
# This option takes an argument, so pack it
410
if optname not in cmd_options:
411
raise BzrOptionError('unknown short option %r for'
413
(shortopt, command.name()))
415
# XXX: Do we ever want to support this, e.g. for -r?
417
raise BzrError('repeated option %r' % a)
418
elif optname in alias_opts:
419
# Replace what's in the alias with what's in the real
421
del alias_opts[optname]
423
proc_argv.insert(0, a)
426
raise BzrError('repeated option %r' % a)
428
option_obj = cmd_options[optname]
429
optargfn = option_obj.type
433
raise BzrError('option %r needs an argument' % a)
435
optarg = proc_argv.pop(0)
436
opts[optname] = optargfn(optarg)
438
alias_opts[optname] = optargfn(optarg)
441
raise BzrError('option %r takes no argument' % optname)
444
alias_opts[optname] = True
447
proc_aliasarg = False # Done with alias argv
923
448
return args, opts
1011
516
os.remove(pfname)
1014
def exception_to_return_code(the_callable, *args, **kwargs):
1015
"""UI level helper for profiling and coverage.
1017
This transforms exceptions into a return value of 3. As such its only
1018
relevant to the UI layer, and should never be called where catching
1019
exceptions may be desirable.
1022
return the_callable(*args, **kwargs)
1023
except (KeyboardInterrupt, Exception):
1024
# used to handle AssertionError and KeyboardInterrupt
1025
# specially here, but hopefully they're handled ok by the logger now
1026
exc_info = sys.exc_info()
1027
exitcode = trace.report_exception(exc_info, sys.stderr)
1028
if os.environ.get('BRZ_PDB'):
1029
print('**** entering debugger')
1031
pdb.post_mortem(exc_info[2])
1035
519
def apply_lsprofiled(filename, the_callable, *args, **kwargs):
1036
from breezy.lsprof import profile
1037
ret, stats = profile(exception_to_return_code, the_callable,
520
from bzrlib.lsprof import profile
522
ret, stats = profile(the_callable, *args, **kwargs)
1040
524
if filename is None:
1043
stats.save(filename)
1044
trace.note(gettext('Profile data written to "%s".'), filename)
528
cPickle.dump(stats, open(filename, 'w'), 2)
529
print 'Profile data written to %r.' % filename
1048
def get_alias(cmd, config=None):
1049
"""Return an expanded alias, or None if no alias exists.
1052
Command to be checked for an alias.
1054
Used to specify an alternative config to use,
1055
which is especially useful for testing.
1056
If it is unspecified, the global config will be used.
1059
import breezy.config
1060
config = breezy.config.GlobalConfig()
1061
alias = config.get_alias(cmd)
534
"""Return an expanded alias, or None if no alias exists"""
536
alias = bzrlib.config.GlobalConfig().get_alias(cmd)
1063
return cmdline.split(alias)
538
return alias.split(' ')
1067
def run_bzr(argv, load_plugins=load_plugins, disable_plugins=disable_plugins):
1068
543
"""Execute a command.
1070
:param argv: The command-line arguments, without the program name from
1071
argv[0] These should already be decoded. All library/test code calling
1072
run_bzr should be passing valid strings (don't need decoding).
1073
:param load_plugins: What function to call when triggering plugin loading.
1074
This function should take no arguments and cause all plugins to be
1076
:param disable_plugins: What function to call when disabling plugin
1077
loading. This function should take no arguments and cause all plugin
1078
loading to be prohibited (so that code paths in your application that
1079
know about some plugins possibly being present will fail to import
1080
those plugins even if they are installed.)
1081
:return: Returns a command exit code or raises an exception.
545
This is similar to main(), but without all the trappings for
546
logging and error handling.
549
The command-line arguments, without the program name from argv[0]
550
These should already be decoded. All library/test code calling
551
run_bzr should be passing valid strings (don't need decoding).
553
Returns a command status or raises an exception.
1083
555
Special master options: these must come before the command because
1084
556
they control how the command is interpreted.
1128
590
elif a == '--lsprof':
1129
591
opt_lsprof = True
1130
592
elif a == '--lsprof-file':
1132
593
opt_lsprof_file = argv[i + 1]
1134
595
elif a == '--no-plugins':
1135
596
opt_no_plugins = True
1136
597
elif a == '--no-aliases':
1137
598
opt_no_aliases = True
1138
elif a == '--no-l10n':
1140
599
elif a == '--builtin':
1141
600
opt_builtin = True
1142
elif a == '--concurrency':
1143
os.environ['BRZ_CONCURRENCY'] = argv[i + 1]
1145
elif a == '--coverage':
1147
elif a == '--profile-imports':
1148
pass # already handled in startup script Bug #588277
1149
elif a.startswith('-D'):
1150
debug.debug_flags.add(a[2:])
1151
elif a.startswith('-O'):
1152
override_config.append(a[2:])
601
elif a in ('--quiet', '-q'):
1154
604
argv_copy.append(a)
1157
cmdline_overrides = breezy.get_global_state().cmdline_overrides
1158
cmdline_overrides._from_cmdline(override_config)
1160
debug.set_debug_flags_from_config()
609
from bzrlib.builtins import cmd_help
610
cmd_help().run_argv_aliases([])
613
if argv[0] == '--version':
614
from bzrlib.builtins import show_version
1162
618
if not opt_no_plugins:
619
from bzrlib.plugin import load_plugins
622
from bzrlib.plugin import disable_plugins
1165
623
disable_plugins()
1169
get_cmd_object('help').run_argv_aliases([])
1172
if argv[0] == '--version':
1173
get_cmd_object('version').run_argv_aliases([])
1176
625
alias_argv = None
1178
627
if not opt_no_aliases:
1179
628
alias_argv = get_alias(argv[0])
630
alias_argv = [a.decode(bzrlib.user_encoding) for a in alias_argv]
1181
631
argv[0] = alias_argv.pop(0)
633
cmd = str(argv.pop(0))
1184
635
cmd_obj = get_cmd_object(cmd, plugins_override=not opt_builtin)
1186
cmd_obj.l10n = False
1187
run = cmd_obj.run_argv_aliases
1188
run_argv = [argv, alias_argv]
636
if not getattr(cmd_obj.run_argv, 'is_deprecated', False):
637
run = cmd_obj.run_argv
640
run = cmd_obj.run_argv_aliases
641
run_argv = [argv, alias_argv]
1191
# We can be called recursively (tests for example), but we don't want
1192
# the verbosity level to propagate.
1193
saved_verbosity_level = option._verbosity_level
1194
option._verbosity_level = 0
1198
'--coverage ignored, because --lsprof is in use.')
1199
645
ret = apply_lsprofiled(opt_lsprof_file, run, *run_argv)
1200
646
elif opt_profile:
1203
'--coverage ignored, because --profile is in use.')
1204
647
ret = apply_profiled(run, *run_argv)
1206
ret = apply_coveraged(run, *run_argv)
1208
649
ret = run(*run_argv)
1211
# reset, in case we may do other commands later within the same
1212
# process. Commands that want to execute sub-commands must propagate
1213
# --verbose in their own way.
1214
if 'memory' in debug.debug_flags:
1215
trace.debug_memory('Process status after command:', short=False)
1216
option._verbosity_level = saved_verbosity_level
1217
# Reset the overrides
1218
cmdline_overrides._reset()
652
# reset, in case we may do other commands later within the same process
1221
655
def display_command(func):
1222
656
"""Decorator that suppresses pipe/interrupt errors."""
1225
659
result = func(*args, **kwargs)
1226
660
sys.stdout.flush()
1228
except IOError as e:
1229
if getattr(e, 'errno', None) is None:
663
if not hasattr(e, 'errno'):
1231
665
if e.errno != errno.EPIPE:
1232
# Win32 raises IOError with errno=0 on a broken pipe
1233
if sys.platform != 'win32' or (e.errno not in (0, errno.EINVAL)):
1236
668
except KeyboardInterrupt:
1238
670
return ignore_pipe
1241
def install_bzr_command_hooks():
1242
"""Install the hooks to supply bzr's own commands."""
1243
if _list_bzr_commands in Command.hooks["list_commands"]:
1245
Command.hooks.install_named_hook("list_commands", _list_bzr_commands,
1247
Command.hooks.install_named_hook("get_command", _get_bzr_command,
1249
Command.hooks.install_named_hook("get_command", _get_plugin_command,
1250
"bzr plugin commands")
1251
Command.hooks.install_named_hook("get_command", _get_external_command,
1252
"bzr external command lookup")
1253
Command.hooks.install_named_hook("get_missing_command",
1254
_try_plugin_provider,
1255
"bzr plugin-provider-db check")
1258
def _specified_or_unicode_argv(argv):
1259
# For internal or testing use, argv can be passed. Otherwise, get it from
1260
# the process arguments in a unicode-safe way.
1262
return osutils.get_unicode_argv()
1265
# ensure all arguments are unicode strings
1267
if not isinstance(a, string_types):
1268
raise ValueError('not native str or unicode: %r' % (a,))
1269
if isinstance(a, bytes):
1270
# For Python 2 only allow ascii native strings
1271
a = a.decode('ascii')
1273
except (ValueError, UnicodeDecodeError):
1274
raise errors.BzrError("argv should be list of unicode strings.")
1278
def main(argv=None):
1279
"""Main entry point of command-line interface.
1281
Typically `breezy.initialize` should be called first.
1283
:param argv: list of unicode command-line arguments similar to sys.argv.
1284
argv[0] is script name usually, it will be ignored.
1285
Don't pass here sys.argv because this list contains plain strings
1286
and not unicode; pass None instead.
1288
:return: exit code of brz command.
1290
if argv is not None:
1292
_register_builtin_commands()
675
from bzrlib.ui.text import TextUIFactory
676
## bzrlib.trace.enable_default_logging()
677
bzrlib.trace.log_startup(argv)
678
bzrlib.ui.ui_factory = TextUIFactory()
680
argv = [a.decode(bzrlib.user_encoding) for a in argv[1:]]
1293
681
ret = run_bzr_catch_errors(argv)
1294
trace.mutter("return code %d", ret)
682
mutter("return code %d", ret)
1298
686
def run_bzr_catch_errors(argv):
1299
"""Run a bzr command with parameters as described by argv.
1301
This function assumed that that UI layer is setup, that symbol deprecations
1302
are already applied, and that unicode decoding has already been performed
1305
# done here so that they're covered for every test run
1306
install_bzr_command_hooks()
1307
return exception_to_return_code(run_bzr, argv)
1310
def run_bzr_catch_user_errors(argv):
1311
"""Run brz and report user errors, but let internal errors propagate.
1313
This is used for the test suite, and might be useful for other programs
1314
that want to wrap the commandline interface.
1316
# done here so that they're covered for every test run
1317
install_bzr_command_hooks()
1319
return run_bzr(argv)
1320
except Exception as e:
1321
if (isinstance(e, (OSError, IOError))
1322
or not getattr(e, 'internal_error', True)):
1323
trace.report_exception(sys.exc_info(), sys.stderr)
1329
class HelpCommandIndex(object):
1330
"""A index for bzr help that returns commands."""
1333
self.prefix = 'commands/'
1335
def get_topics(self, topic):
1336
"""Search for topic amongst commands.
1338
:param topic: A topic to search for.
1339
:return: A list which is either empty or contains a single
1342
if topic and topic.startswith(self.prefix):
1343
topic = topic[len(self.prefix):]
1345
cmd = _get_cmd_object(topic, check_missing=False)
691
# do this here inside the exception wrappers to catch EPIPE
694
# used to handle AssertionError and KeyboardInterrupt
695
# specially here, but hopefully they're handled ok by the logger now
697
if (isinstance(e, IOError)
698
and hasattr(e, 'errno')
699
and e.errno == errno.EPIPE):
700
bzrlib.trace.note('broken pipe')
1352
class Provider(object):
1353
"""Generic class to be overriden by plugins"""
1355
def plugin_for_command(self, cmd_name):
1356
"""Takes a command and returns the information for that plugin
1358
:return: A dictionary with all the available information
1359
for the requested plugin
1361
raise NotImplementedError
1364
class ProvidersRegistry(registry.Registry):
1365
"""This registry exists to allow other providers to exist"""
1368
for key, provider in self.items():
1372
command_providers_registry = ProvidersRegistry()
703
bzrlib.trace.log_exception()
704
if os.environ.get('BZR_PDB'):
705
print '**** entering debugger'
707
pdb.post_mortem(sys.exc_traceback)
710
if __name__ == '__main__':
711
sys.exit(main(sys.argv))
added
removed
bzrlib/commands.py
