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# Copyright (C) 2005-2011 Canonical Ltd
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# Copyright (C) 2004, 2005 by Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# TODO: probably should say which arguments are candidates for glob
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# expansion on windows and do that at the command level.
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# TODO: Help messages for options.
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# TODO: Define arguments by objects, rather than just using names.
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# Those objects can specify the expected type of the argument, which
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# would help with validation and shell completion. They could also provide
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# help/explanation for that argument in a structured way.
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# TODO: Specific "examples" property on commands for consistent formatting.
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# would help with validation and shell completion.
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# TODO: "--profile=cum", to change sort order. Is there any value in leaving
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# the profile output behind so it can be interactively examined?
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from .lazy_import import lazy_import
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lazy_import(globals(), """
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from warnings import warn
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from inspect import getdoc
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from .hooks import Hooks
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from .i18n import gettext
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# Compatibility - Option used to be in commands.
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from .option import Option
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from .plugin import disable_plugins, load_plugins, plugin_name
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from . import errors, registry
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class BzrOptionError(errors.CommandError):
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_fmt = "Error in command line options"
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class CommandAvailableInPlugin(Exception):
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internal_error = False
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def __init__(self, cmd_name, plugin_metadata, provider):
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self.plugin_metadata = plugin_metadata
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self.cmd_name = cmd_name
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self.provider = provider
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_fmt = ('"%s" is not a standard brz command. \n'
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'However, the following official plugin provides this command: %s\n'
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'You can install it by going to: %s'
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% (self.cmd_name, self.plugin_metadata['name'],
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self.plugin_metadata['url']))
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class CommandInfo(object):
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"""Information about a command."""
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def __init__(self, aliases):
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"""The list of aliases for the command."""
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self.aliases = aliases
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def from_command(klass, command):
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"""Factory to construct a CommandInfo from a command."""
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return klass(command.aliases)
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class CommandRegistry(registry.Registry):
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"""Special registry mapping command names to command classes.
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:ivar overridden_registry: Look in this registry for commands being
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overridden by this registry. This can be used to tell plugin commands
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about the builtin they're decorating.
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registry.Registry.__init__(self)
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self.overridden_registry = None
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# map from aliases to the real command that implements the name
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self._alias_dict = {}
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def get(self, command_name):
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real_name = self._alias_dict.get(command_name, command_name)
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return registry.Registry.get(self, real_name)
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def _get_name(command_name):
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if command_name.startswith("cmd_"):
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return _unsquish_command_name(command_name)
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def register(self, cmd, decorate=False):
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"""Utility function to help register a command
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:param cmd: Command subclass to register
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:param decorate: If true, allow overriding an existing command
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of the same name; the old command is returned by this function.
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Otherwise it is an error to try to override an existing command.
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k_unsquished = self._get_name(k)
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previous = self.get(k_unsquished)
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if self.overridden_registry:
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previous = self.overridden_registry.get(k_unsquished)
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info = CommandInfo.from_command(cmd)
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registry.Registry.register(self, k_unsquished, cmd,
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override_existing=decorate, info=info)
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trace.warning('Two plugins defined the same command: %r' % k)
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trace.warning('Not loading the one in %r' %
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sys.modules[cmd.__module__])
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trace.warning('Previously this command was registered from %r' %
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sys.modules[previous.__module__])
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for a in cmd.aliases:
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self._alias_dict[a] = k_unsquished
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def register_lazy(self, command_name, aliases, module_name):
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"""Register a command without loading its module.
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:param command_name: The primary name of the command.
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:param aliases: A list of aliases for the command.
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:module_name: The module that the command lives in.
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key = self._get_name(command_name)
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registry.Registry.register_lazy(self, key, module_name, command_name,
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info=CommandInfo(aliases))
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self._alias_dict[a] = key
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plugin_cmds = CommandRegistry()
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builtin_command_registry = CommandRegistry()
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plugin_cmds.overridden_registry = builtin_command_registry
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from bzrlib.trace import mutter, note, log_error, warning, be_quiet
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from bzrlib.errors import (BzrError,
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from bzrlib.revisionspec import RevisionSpec
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from bzrlib import BZRDIR
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from bzrlib.option import Option
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def register_command(cmd, decorate=False):
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"""Register a plugin command.
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Should generally be avoided in favor of lazy registration.
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"Utility function to help register a command"
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global plugin_cmds
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return plugin_cmds.register(cmd, decorate)
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if k.startswith("cmd_"):
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k_unsquished = _unsquish_command_name(k)
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if not plugin_cmds.has_key(k_unsquished):
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plugin_cmds[k_unsquished] = cmd
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mutter('registered plugin command %s', k_unsquished)
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if decorate and k_unsquished in builtin_command_names():
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return _builtin_commands()[k_unsquished]
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result = plugin_cmds[k_unsquished]
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plugin_cmds[k_unsquished] = cmd
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log_error('Two plugins defined the same command: %r' % k)
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log_error('Not loading the one in %r' % sys.modules[cmd.__module__])
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def _squish_command_name(cmd):
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def _unsquish_command_name(cmd):
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return cmd[4:].replace('_', '-')
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def _register_builtin_commands():
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if builtin_command_registry.keys():
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import breezy.builtins
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for cmd_class in _scan_module_for_commands(breezy.builtins):
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builtin_command_registry.register(cmd_class)
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breezy.builtins._register_lazy_builtins()
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def _scan_module_for_commands(module):
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module_dict = module.__dict__
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for name in module_dict:
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assert cmd.startswith("cmd_")
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return cmd[4:].replace('_','-')
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def _builtin_commands():
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import bzrlib.builtins
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builtins = bzrlib.builtins.__dict__
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if name.startswith("cmd_"):
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yield module_dict[name]
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def _list_bzr_commands(names):
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"""Find commands from bzr's core and plugins.
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This is not the public interface, just the default hook called by
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# to eliminate duplicates
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names.update(builtin_command_names())
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names.update(plugin_command_names())
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def all_command_names():
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"""Return a set of all command names."""
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for hook in Command.hooks['list_commands']:
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raise AssertionError(
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'hook %s returned None' % Command.hooks.get_hook_name(hook))
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real_name = _unsquish_command_name(name)
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r[real_name] = builtins[name]
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def builtin_command_names():
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"""Return list of builtin command names.
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Use of all_command_names() is encouraged rather than builtin_command_names
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and/or plugin_command_names.
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_register_builtin_commands()
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return builtin_command_registry.keys()
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"""Return list of builtin command names."""
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return _builtin_commands().keys()
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def plugin_command_names():
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"""Returns command names from commands registered by plugins."""
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return plugin_cmds.keys()
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# Overrides for common mispellings that heuristics get wrong
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'ic': {'ci': 0}, # heuristic finds nick
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def guess_command(cmd_name):
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"""Guess what command a user typoed.
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:param cmd_name: Command to search for
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:return: None if no command was found, name of a command otherwise
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for name in all_command_names():
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cmd = get_cmd_object(name)
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names.update(cmd.aliases)
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# candidate: modified levenshtein distance against cmd_name.
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for name in sorted(names):
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matcher = patiencediff.PatienceSequenceMatcher(None, cmd_name, name)
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opcodes = matcher.get_opcodes()
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for opcode, l1, l2, r1, r2 in opcodes:
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if opcode == 'delete':
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elif opcode == 'replace':
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distance += max(l2 - l1, r2 - l1)
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elif opcode == 'insert':
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elif opcode == 'equal':
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# Score equal ranges lower, making similar commands of equal
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# length closer than arbitrary same length commands.
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distance -= 0.1 * (l2 - l1)
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costs[name] = distance
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costs.update(_GUESS_OVERRIDES.get(cmd_name, {}))
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costs = sorted((costs[key], key) for key in costs)
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candidate = costs[0][1]
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def _get_cmd_dict(plugins_override=True):
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"""Return name->class mapping for all commands."""
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d = _builtin_commands()
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d.update(plugin_cmds)
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def get_all_cmds(plugins_override=True):
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"""Return canonical name and class for all registered commands."""
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for k, v in _get_cmd_dict(plugins_override=plugins_override).iteritems():
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def get_cmd_object(cmd_name, plugins_override=True):
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"""Return the command object for a command.
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"""Return the canonical name and command class for a command.
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If true, plugin commands can override builtins.
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return _get_cmd_object(cmd_name, plugins_override)
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# No command found, see if this was a typo
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candidate = guess_command(cmd_name)
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if candidate is not None:
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raise errors.CommandError(
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gettext('unknown command "%s". Perhaps you meant "%s"')
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% (cmd_name, candidate))
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raise errors.CommandError(gettext('unknown command "%s"')
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def _get_cmd_object(cmd_name, plugins_override=True, check_missing=True):
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"""Get a command object.
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:param cmd_name: The name of the command.
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:param plugins_override: Allow plugins to override builtins.
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:param check_missing: Look up commands not found in the regular index via
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the get_missing_command hook.
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:return: A Command object instance
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:raises KeyError: If no command is found.
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# We want only 'ascii' command names, but the user may have typed
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# in a Unicode name. In that case, they should just get a
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# 'command not found' error later.
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# In the future, we may actually support Unicode command names.
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for hook in Command.hooks['get_command']:
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cmd = hook(cmd, cmd_name)
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if cmd is not None and not plugins_override and not cmd.plugin_name():
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# We've found a non-plugin command, don't permit it to be
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if cmd is None and check_missing:
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for hook in Command.hooks['get_missing_command']:
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# Allow plugins to extend commands
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for hook in Command.hooks['extend_command']:
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if getattr(cmd, 'invoked_as', None) is None:
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cmd.invoked_as = cmd_name
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class NoPluginAvailable(errors.BzrError):
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def _try_plugin_provider(cmd_name):
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"""Probe for a plugin provider having cmd_name."""
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plugin_metadata, provider = probe_for_provider(cmd_name)
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raise CommandAvailableInPlugin(cmd_name, plugin_metadata, provider)
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except NoPluginAvailable:
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def probe_for_provider(cmd_name):
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"""Look for a provider for cmd_name.
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:param cmd_name: The command name.
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:return: plugin_metadata, provider for getting cmd_name.
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:raises NoPluginAvailable: When no provider can supply the plugin.
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# look for providers that provide this command but aren't installed
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for provider in command_providers_registry:
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return provider.plugin_for_command(cmd_name), provider
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except NoPluginAvailable:
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raise NoPluginAvailable(cmd_name)
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def _get_bzr_command(cmd_or_None, cmd_name):
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"""Get a command from bzr's core."""
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cmd_class = builtin_command_registry.get(cmd_name)
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def _get_external_command(cmd_or_None, cmd_name):
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"""Lookup a command that is a shell script."""
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# Only do external command lookups when no command is found so far.
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if cmd_or_None is not None:
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from breezy.externalcommand import ExternalCommand
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from bzrlib.externalcommand import ExternalCommand
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cmd_name = str(cmd_name) # not unicode
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# first look up this command under the specified name
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cmds = _get_cmd_dict(plugins_override=plugins_override)
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return cmds[cmd_name]()
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# look for any command which claims this as an alias
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for real_cmd_name, cmd_class in cmds.iteritems():
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if cmd_name in cmd_class.aliases:
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cmd_obj = ExternalCommand.find_command(cmd_name)
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def _get_plugin_command(cmd_or_None, cmd_name):
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"""Get a command from brz's plugins."""
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return plugin_cmds.get(cmd_name)()
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for key in plugin_cmds.keys():
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info = plugin_cmds.get_info(key)
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if cmd_name in info.aliases:
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return plugin_cmds.get(key)()
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raise BzrCommandError("unknown command %r" % cmd_name)
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class Command(object):
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"""Base class for commands.
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Commands are the heart of the command-line brz interface.
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Commands are the heart of the command-line bzr interface.
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The command object mostly handles the mapping of command-line
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parameters into one or more breezy operations, and of the results
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parameters into one or more bzrlib operations, and of the results
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into textual output.
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Commands normally don't have any state. All their arguments are
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summary, then a complete description of the command. A grammar
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description will be inserted.
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:cvar aliases: Other accepted names for this command.
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:cvar takes_args: List of argument forms, marked with whether they are
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optional, repeated, etc. Examples::
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['to_location', 'from_branch?', 'file*']
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* 'to_location' is required
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* 'from_branch' is optional
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* 'file' can be specified 0 or more times
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:cvar takes_options: List of options that may be given for this command.
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These can be either strings, referring to globally-defined options, or
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option objects. Retrieve through options().
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:cvar hidden: If true, this command isn't advertised. This is typically
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Other accepted names for this command.
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List of argument forms, marked with whether they are optional,
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['to_location', 'from_branch?', 'file*']
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'to_location' is required
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'from_branch' is optional
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'file' can be specified 0 or more times
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List of options that may be given for this command. These can
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be either strings, referring to globally-defined options,
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or option objects. Retrieve through options().
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If true, this command isn't advertised. This is typically
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for commands intended for expert users.
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:cvar encoding_type: Command objects will get a 'outf' attribute, which has
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been setup to properly handle encoding of unicode strings.
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encoding_type determines what will happen when characters cannot be
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* strict - abort if we cannot decode
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* replace - put in a bogus character (typically '?')
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* exact - do not encode sys.stdout
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NOTE: by default on Windows, sys.stdout is opened as a text stream,
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therefore LF line-endings are converted to CRLF. When a command uses
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encoding_type = 'exact', then sys.stdout is forced to be a binary
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stream, and line-endings will not mangled.
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A string indicating the real name under which this command was
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invoked, before expansion of aliases.
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(This may be None if the command was constructed and run in-process.)
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:cvar hooks: An instance of CommandHooks.
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:cvar __doc__: The help shown by 'brz help command' for this command.
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This is set by assigning explicitly to __doc__ so that -OO can
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__doc__ = "My help goes here"
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takes_options = []
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encoding_type = 'strict'
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def __init__(self):
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"""Construct an instance of this command."""
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# List of standard options directly supported
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self.supported_std_options = []
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def add_cleanup(self, cleanup_func, *args, **kwargs):
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"""Register a function to call after self.run returns or raises.
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Functions will be called in LIFO order.
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self._exit_stack.callback(cleanup_func, *args, **kwargs)
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def cleanup_now(self):
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"""Execute and empty pending cleanup functions immediately.
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After cleanup_now all registered cleanups are forgotten. add_cleanup
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may be called again after cleanup_now; these cleanups will be called
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after self.run returns or raises (or when cleanup_now is next called).
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This is useful for releasing expensive or contentious resources (such
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as write locks) before doing further work that does not require those
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resources (such as writing results to self.outf). Note though, that
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as it releases all resources, this may release locks that the command
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wants to hold, so use should be done with care.
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self._exit_stack.close()
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def enter_context(self, cm):
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return self._exit_stack.enter_context(cm)
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"""Return single-line grammar for this command.
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Only describes arguments, not options.
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s = 'brz ' + self.name() + ' '
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for aname in self.takes_args:
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aname = aname.upper()
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if aname[-1] in ['$', '+']:
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aname = aname[:-1] + '...'
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elif aname[-1] == '?':
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aname = '[' + aname[:-1] + ']'
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elif aname[-1] == '*':
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aname = '[' + aname[:-1] + '...]'
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s = s[:-1] # remove last space
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def get_help_text(self, additional_see_also=None, plain=True,
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see_also_as_links=False, verbose=True):
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"""Return a text string with help for this command.
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:param additional_see_also: Additional help topics to be
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:param plain: if False, raw help (reStructuredText) is
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returned instead of plain text.
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:param see_also_as_links: if True, convert items in 'See also'
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list to internal links (used by bzr_man rstx generator)
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:param verbose: if True, display the full help, otherwise
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leave out the descriptive sections and just display
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usage help (e.g. Purpose, Usage, Options) with a
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message explaining how to obtain full help.
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i18n.install() # Install i18n only for get_help_text for now.
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# Note: If self.gettext() translates ':Usage:\n', the section will
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# be shown after "Description" section and we don't want to
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# translate the usage string.
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# Though, brz export-pot don't exports :Usage: section and it must
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doc = self.gettext(doc)
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doc = gettext("No help for this command.")
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# Extract the summary (purpose) and sections out from the text
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purpose, sections, order = self._get_help_parts(doc)
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# If a custom usage section was provided, use it
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if 'Usage' in sections:
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usage = sections.pop('Usage')
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usage = self._usage()
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# The header is the purpose and usage
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result += gettext(':Purpose: %s\n') % (purpose,)
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if usage.find('\n') >= 0:
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result += gettext(':Usage:\n%s\n') % (usage,)
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result += gettext(':Usage: %s\n') % (usage,)
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# XXX: optparse implicitly rewraps the help, and not always perfectly,
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# so we get <https://bugs.launchpad.net/bzr/+bug/249908>. -- mbp
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parser = option.get_optparser(
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[v for k, v in sorted(self.options().items())])
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options = parser.format_option_help()
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# FIXME: According to the spec, ReST option lists actually don't
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# support options like --1.14 so that causes syntax errors (in Sphinx
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# at least). As that pattern always appears in the commands that
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# break, we trap on that and then format that block of 'format' options
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# as a literal block. We use the most recent format still listed so we
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# don't have to do that too often -- vila 20110514
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if not plain and options.find(' --1.14 ') != -1:
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options = options.replace(' format:\n', ' format::\n\n', 1)
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if options.startswith('Options:'):
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result += gettext(':Options:%s') % (options[len('options:'):],)
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# Add the description, indenting it 2 spaces
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# to match the indentation of the options
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text = sections.pop(None)
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text = '\n '.join(text.splitlines())
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result += gettext(':Description:\n %s\n\n') % (text,)
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# Add the custom sections (e.g. Examples). Note that there's no need
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# to indent these as they must be indented already in the source.
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if label in sections:
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result += ':%s:\n%s\n' % (label, sections[label])
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result += (gettext("See brz help %s for more details and examples.\n\n")
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# Add the aliases, source (plug-in) and see also links, if any
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result += gettext(':Aliases: ')
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result += ', '.join(self.aliases) + '\n'
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plugin_name = self.plugin_name()
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if plugin_name is not None:
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result += gettext(':From: plugin "%s"\n') % plugin_name
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see_also = self.get_see_also(additional_see_also)
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if not plain and see_also_as_links:
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for item in see_also:
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# topics doesn't have an independent section
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# so don't create a real link
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see_also_links.append(item)
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# Use a Sphinx link for this entry
637
link_text = gettext(":doc:`{0} <{1}-help>`").format(
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see_also_links.append(link_text)
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see_also = see_also_links
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result += gettext(':See also: %s') % ', '.join(see_also) + '\n'
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# If this will be rendered as plain text, convert it
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import breezy.help_topics
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result = breezy.help_topics.help_as_plain_text(result)
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def _get_help_parts(text):
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"""Split help text into a summary and named sections.
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:return: (summary,sections,order) where summary is the top line and
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sections is a dictionary of the rest indexed by section name.
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order is the order the section appear in the text.
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A section starts with a heading line of the form ":xxx:".
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Indented text on following lines is the section value.
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All text found outside a named section is assigned to the
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default section which is given the key of None.
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def save_section(sections, order, label, section):
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if label in sections:
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sections[label] += '\n' + section
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sections[label] = section
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lines = text.rstrip().splitlines()
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summary = lines.pop(0)
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label, section = None, ''
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if line.startswith(':') and line.endswith(':') and len(line) > 2:
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save_section(sections, order, label, section)
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label, section = line[1:-1], ''
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elif (label is not None and len(line) > 1 and
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not line[0].isspace()):
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save_section(sections, order, label, section)
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label, section = None, line
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section += '\n' + line
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save_section(sections, order, label, section)
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return summary, sections, order
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def get_help_topic(self):
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"""Return the commands help topic - its name."""
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def get_see_also(self, additional_terms=None):
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"""Return a list of help topics that are related to this command.
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The list is derived from the content of the _see_also attribute. Any
698
duplicates are removed and the result is in lexical order.
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:param additional_terms: Additional help topics to cross-reference.
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:return: A list of help topics.
702
see_also = set(getattr(self, '_see_also', []))
704
see_also.update(additional_terms)
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return sorted(see_also)
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if self.__doc__ == Command.__doc__:
197
warn("No help message set for %r" % self)
707
199
def options(self):
708
200
"""Return dict of valid options for this command.
710
202
Maps from long option name to option object."""
711
r = Option.STD_OPTIONS.copy()
204
r['help'] = Option.OPTIONS['help']
713
205
for o in self.takes_options:
714
if isinstance(o, str):
715
o = option.Option.OPTIONS[o]
206
if not isinstance(o, Option):
207
o = Option.OPTIONS[o]
717
if o.name in std_names:
718
self.supported_std_options.append(o.name)
721
def _setup_outf(self):
722
"""Return a file linked to stdout, which has proper encoding."""
723
self.outf = ui.ui_factory.make_output_stream(
724
encoding_type=self.encoding_type)
726
def run_argv_aliases(self, argv, alias_argv=None):
727
"""Parse the command line and run with extra aliases in alias_argv."""
728
args, opts = parse_args(self, argv, alias_argv)
731
# Process the standard options
732
if 'help' in opts: # e.g. brz add --help
733
self.outf.write(self.get_help_text())
735
if 'usage' in opts: # e.g. brz add --usage
736
self.outf.write(self.get_help_text(verbose=False))
738
trace.set_verbosity_level(option._verbosity_level)
739
if 'verbose' in self.supported_std_options:
740
opts['verbose'] = trace.is_verbose()
741
elif 'verbose' in opts:
743
if 'quiet' in self.supported_std_options:
744
opts['quiet'] = trace.is_quiet()
745
elif 'quiet' in opts:
211
def run_argv(self, argv):
212
"""Parse command line and run."""
213
args, opts = parse_args(self, argv)
214
if 'help' in opts: # e.g. bzr add --help
215
from bzrlib.help import help_on_command
216
help_on_command(self.name())
218
# XXX: This should be handled by the parser
219
allowed_names = self.options().keys()
221
if oname not in allowed_names:
222
raise BzrCommandError("option '--%s' is not allowed for command %r"
223
% (oname, self.name()))
747
224
# mix arguments and options into one dictionary
748
225
cmdargs = _match_argform(self.name(), self.takes_args, args)
794
241
Return 0 or None if the command was successful, or a non-zero
795
242
shell error code if not. It's OK for this method to allow
796
243
an exception to raise up.
798
This method is automatically wrapped by Command.__init__ with a
799
ExitStack, stored as self._exit_stack. This can be used
800
via self.add_cleanup to perform automatic cleanups at the end of
803
The argument for run are assembled by introspection. So for instance,
804
if your command takes an argument files, you would declare::
806
def run(self, files=None):
809
raise NotImplementedError('no implementation of command %r'
245
raise NotImplementedError()
813
249
"""Return help message for this class."""
814
from inspect import getdoc
815
250
if self.__doc__ is Command.__doc__:
817
252
return getdoc(self)
819
def gettext(self, message):
820
"""Returns the gettext function used to translate this command's help.
822
Commands provided by plugins should override this to use their
825
return i18n.gettext_per_paragraph(message)
828
"""Return the canonical name for this command.
830
The name under which it was actually invoked is available in invoked_as
832
255
return _unsquish_command_name(self.__class__.__name__)
834
def plugin_name(self):
835
"""Get the name of the plugin that provides this command.
837
:return: The name of the plugin or None if the command is builtin.
839
return plugin_name(self.__module__)
842
class CommandHooks(Hooks):
843
"""Hooks related to Command object creation/enumeration."""
846
"""Create the default hooks.
848
These are all empty initially, because by default nothing should get
851
Hooks.__init__(self, "breezy.commands", "Command.hooks")
854
"Called after creating a command object to allow modifications "
855
"such as adding or removing options, docs etc. Called with the "
856
"new breezy.commands.Command object.", (1, 13))
859
"Called when creating a single command. Called with "
860
"(cmd_or_None, command_name). get_command should either return "
861
"the cmd_or_None parameter, or a replacement Command object that "
862
"should be used for the command. Note that the Command.hooks "
863
"hooks are core infrastructure. Many users will prefer to use "
864
"breezy.commands.register_command or plugin_cmds.register_lazy.",
867
'get_missing_command',
868
"Called when creating a single command if no command could be "
869
"found. Called with (command_name). get_missing_command should "
870
"either return None, or a Command object to be used for the "
874
"Called when enumerating commands. Called with a set of "
875
"cmd_name strings for all the commands found so far. This set "
876
" is safe to mutate - e.g. to remove a command. "
877
"list_commands should return the updated set of command names.",
881
"Called prior to executing a command. Called with the command "
885
"Called after executing a command. Called with the command "
889
Command.hooks = CommandHooks()
892
def parse_args(command, argv, alias_argv=None):
258
def parse_spec(spec):
264
>>> parse_spec("../@")
266
>>> parse_spec("../f/@35")
268
>>> parse_spec('./@revid:john@arbash-meinel.com-20050711044610-3ca0327c6a222f67')
269
['.', 'revid:john@arbash-meinel.com-20050711044610-3ca0327c6a222f67']
274
parsed = spec.split('/@')
275
assert len(parsed) == 2
280
parsed[1] = int(parsed[1])
282
pass # We can allow stuff like ./@revid:blahblahblah
286
parsed = [spec, None]
289
def parse_args(command, argv):
893
290
"""Parse command line.
895
292
Arguments and options are parsed at this level before being passed
896
293
down to specific command handlers. This routine knows, from a
897
294
lookup table, something about the available options, what optargs
898
295
they take, and which commands will accept them.
900
# TODO: make it a method of the Command?
901
parser = option.get_optparser(
902
[v for k, v in sorted(command.options().items())])
903
if alias_argv is not None:
904
args = alias_argv + argv
908
# python 2's optparse raises this exception if a non-ascii
909
# option name is given. See http://bugs.python.org/issue2931
911
options, args = parser.parse_args(args)
912
except UnicodeEncodeError:
913
raise errors.CommandError(
914
gettext('Only ASCII permitted in option names'))
916
opts = dict((k, v) for k, v in options.__dict__.items() if
917
v is not option.OptionParser.DEFAULT_VALUE)
297
# TODO: chop up this beast; make it a method of the Command
301
cmd_options = command.options()
309
# We've received a standalone -- No more flags
313
# option names must not be unicode
317
mutter(" got option %r", a)
319
optname, optarg = a[2:].split('=', 1)
322
if optname not in cmd_options:
323
raise BzrOptionError('unknown long option %r for command %s'
324
% (a, command.name()))
327
if shortopt in Option.SHORT_OPTIONS:
328
# Multi-character options must have a space to delimit
330
# ^^^ what does this mean? mbp 20051014
331
optname = Option.SHORT_OPTIONS[shortopt].name
333
# Single character short options, can be chained,
334
# and have their value appended to their name
336
if shortopt not in Option.SHORT_OPTIONS:
337
# We didn't find the multi-character name, and we
338
# didn't find the single char name
339
raise BzrError('unknown short option %r' % a)
340
optname = Option.SHORT_OPTIONS[shortopt].name
343
# There are extra things on this option
344
# see if it is the value, or if it is another
346
optargfn = Option.OPTIONS[optname].type
348
# This option does not take an argument, so the
349
# next entry is another short option, pack it back
351
argv.insert(0, '-' + a[2:])
353
# This option takes an argument, so pack it
357
if optname not in cmd_options:
358
raise BzrOptionError('unknown short option %r for command'
359
' %s' % (shortopt, command.name()))
361
# XXX: Do we ever want to support this, e.g. for -r?
362
raise BzrError('repeated option %r' % a)
364
option_obj = cmd_options[optname]
365
optargfn = option_obj.type
369
raise BzrError('option %r needs an argument' % a)
372
opts[optname] = optargfn(optarg)
375
raise BzrError('option %r takes no argument' % optname)
918
379
return args, opts
1006
447
os.remove(pfname)
1009
def exception_to_return_code(the_callable, *args, **kwargs):
1010
"""UI level helper for profiling and coverage.
1012
This transforms exceptions into a return value of 3. As such its only
1013
relevant to the UI layer, and should never be called where catching
1014
exceptions may be desirable.
1017
return the_callable(*args, **kwargs)
1018
except (KeyboardInterrupt, Exception):
1019
# used to handle AssertionError and KeyboardInterrupt
1020
# specially here, but hopefully they're handled ok by the logger now
1021
exc_info = sys.exc_info()
1022
exitcode = trace.report_exception(exc_info, sys.stderr)
1023
if os.environ.get('BRZ_PDB'):
1024
print('**** entering debugger')
1026
pdb.post_mortem(exc_info[2])
1030
def apply_lsprofiled(filename, the_callable, *args, **kwargs):
1031
from breezy.lsprof import profile
1032
ret, stats = profile(exception_to_return_code, the_callable,
450
def apply_lsprofiled(the_callable, *args, **kwargs):
451
from bzrlib.lsprof import profile
452
ret,stats = profile(the_callable,*args,**kwargs)
1035
if filename is None:
1038
stats.save(filename)
1039
trace.note(gettext('Profile data written to "%s".'), filename)
1043
def get_alias(cmd, config=None):
1044
"""Return an expanded alias, or None if no alias exists.
1047
Command to be checked for an alias.
1049
Used to specify an alternative config to use,
1050
which is especially useful for testing.
1051
If it is unspecified, the global config will be used.
1054
import breezy.config
1055
config = breezy.config.GlobalConfig()
1056
alias = config.get_alias(cmd)
1058
return cmdline.split(alias)
1062
def run_bzr(argv, load_plugins=load_plugins, disable_plugins=disable_plugins):
1063
458
"""Execute a command.
1065
:param argv: The command-line arguments, without the program name from
1066
argv[0] These should already be decoded. All library/test code calling
1067
run_bzr should be passing valid strings (don't need decoding).
1068
:param load_plugins: What function to call when triggering plugin loading.
1069
This function should take no arguments and cause all plugins to be
1071
:param disable_plugins: What function to call when disabling plugin
1072
loading. This function should take no arguments and cause all plugin
1073
loading to be prohibited (so that code paths in your application that
1074
know about some plugins possibly being present will fail to import
1075
those plugins even if they are installed.)
1076
:return: Returns a command exit code or raises an exception.
460
This is similar to main(), but without all the trappings for
461
logging and error handling.
464
The command-line arguments, without the program name from argv[0]
466
Returns a command status or raises an exception.
1078
468
Special master options: these must come before the command because
1079
469
they control how the command is interpreted.
1095
482
Run under the Python lsprof profiler.
1098
Generate code coverage report
1101
Specify the number of processes that can be run concurrently
1104
trace.mutter("breezy version: " + breezy.__version__)
1105
argv = _specified_or_unicode_argv(argv)
1106
trace.mutter("brz arguments: %r", argv)
484
argv = [a.decode(bzrlib.user_encoding) for a in argv]
1108
opt_lsprof = opt_profile = opt_no_plugins = opt_builtin = \
1109
opt_coverage = opt_no_l10n = opt_no_aliases = False
1110
opt_lsprof_file = None
486
opt_lsprof = opt_profile = opt_no_plugins = opt_builtin = False
1112
488
# --no-plugins is handled specially at a very early stage. We need
1113
489
# to load plugins before doing other command parsing so that they
1114
490
# can override commands, but this needs to happen first.
1118
override_config = []
1119
while i < len(argv):
1121
493
if a == '--profile':
1122
494
opt_profile = True
1123
495
elif a == '--lsprof':
1124
496
opt_lsprof = True
1125
elif a == '--lsprof-file':
1127
opt_lsprof_file = argv[i + 1]
1129
497
elif a == '--no-plugins':
1130
498
opt_no_plugins = True
1131
elif a == '--no-aliases':
1132
opt_no_aliases = True
1133
elif a == '--no-l10n':
1135
499
elif a == '--builtin':
1136
500
opt_builtin = True
1137
elif a == '--concurrency':
1138
os.environ['BRZ_CONCURRENCY'] = argv[i + 1]
1140
elif a == '--coverage':
1142
elif a == '--profile-imports':
1143
pass # already handled in startup script Bug #588277
1144
elif a.startswith('-D'):
1145
debug.debug_flags.add(a[2:])
1146
elif a.startswith('-O'):
1147
override_config.append(a[2:])
1152
cmdline_overrides = breezy.get_global_state().cmdline_overrides
1153
cmdline_overrides._from_cmdline(override_config)
1155
debug.set_debug_flags_from_config()
501
elif a in ('--quiet', '-q'):
507
if (not argv) or (argv[0] == '--help'):
508
from bzrlib.help import help
515
if argv[0] == '--version':
516
from bzrlib.builtins import show_version
1157
520
if not opt_no_plugins:
1158
from breezy import config
1159
c = config.GlobalConfig()
1160
warn_load_problems = not c.suppress_warning('plugin_load_failure')
1161
load_plugins(warn_load_problems=warn_load_problems)
1167
get_cmd_object('help').run_argv_aliases([])
1170
if argv[0] == '--version':
1171
get_cmd_object('version').run_argv_aliases([])
1176
if not opt_no_aliases:
1177
alias_argv = get_alias(argv[0])
1179
argv[0] = alias_argv.pop(0)
521
from bzrlib.plugin import load_plugins
524
cmd = str(argv.pop(0))
1182
526
cmd_obj = get_cmd_object(cmd, plugins_override=not opt_builtin)
1184
cmd_obj.l10n = False
1185
run = cmd_obj.run_argv_aliases
1186
run_argv = [argv, alias_argv]
1189
# We can be called recursively (tests for example), but we don't want
1190
# the verbosity level to propagate.
1191
saved_verbosity_level = option._verbosity_level
1192
option._verbosity_level = 0
1196
'--coverage ignored, because --lsprof is in use.')
1197
ret = apply_lsprofiled(opt_lsprof_file, run, *run_argv)
530
ret = apply_lsprofiled(cmd_obj.run_argv, argv)
1198
531
elif opt_profile:
1201
'--coverage ignored, because --profile is in use.')
1202
ret = apply_profiled(run, *run_argv)
1204
ret = apply_coveraged(run, *run_argv)
532
ret = apply_profiled(cmd_obj.run_argv, argv)
1206
ret = run(*run_argv)
534
ret = cmd_obj.run_argv(argv)
1209
# reset, in case we may do other commands later within the same
1210
# process. Commands that want to execute sub-commands must propagate
1211
# --verbose in their own way.
1212
if 'memory' in debug.debug_flags:
1213
trace.debug_memory('Process status after command:', short=False)
1214
option._verbosity_level = saved_verbosity_level
1215
# Reset the overrides
1216
cmdline_overrides._reset()
537
# reset, in case we may do other commands later within the same process
1219
540
def display_command(func):
1220
541
"""Decorator that suppresses pipe/interrupt errors."""
1223
544
result = func(*args, **kwargs)
1224
545
sys.stdout.flush()
1226
except IOError as e:
1227
if getattr(e, 'errno', None) is None:
548
if not hasattr(e, 'errno'):
1229
550
if e.errno != errno.EPIPE:
1230
# Win32 raises IOError with errno=0 on a broken pipe
1231
if sys.platform != 'win32' or (e.errno not in (0, errno.EINVAL)):
1234
553
except KeyboardInterrupt:
1236
555
return ignore_pipe
1239
def install_bzr_command_hooks():
1240
"""Install the hooks to supply bzr's own commands."""
1241
if _list_bzr_commands in Command.hooks["list_commands"]:
1243
Command.hooks.install_named_hook("list_commands", _list_bzr_commands,
1245
Command.hooks.install_named_hook("get_command", _get_bzr_command,
1247
Command.hooks.install_named_hook("get_command", _get_plugin_command,
1248
"bzr plugin commands")
1249
Command.hooks.install_named_hook("get_command", _get_external_command,
1250
"bzr external command lookup")
1251
Command.hooks.install_named_hook("get_missing_command",
1252
_try_plugin_provider,
1253
"bzr plugin-provider-db check")
1256
def _specified_or_unicode_argv(argv):
1257
# For internal or testing use, argv can be passed. Otherwise, get it from
1258
# the process arguments.
1263
# ensure all arguments are unicode strings
1265
if not isinstance(a, str):
1266
raise ValueError('not native str or unicode: %r' % (a,))
1268
except (ValueError, UnicodeDecodeError):
1269
raise errors.BzrError("argv should be list of unicode strings.")
1273
def main(argv=None):
1274
"""Main entry point of command-line interface.
1276
Typically `breezy.initialize` should be called first.
1278
:param argv: list of unicode command-line arguments similar to sys.argv.
1279
argv[0] is script name usually, it will be ignored.
1280
Don't pass here sys.argv because this list contains plain strings
1281
and not unicode; pass None instead.
1283
:return: exit code of brz command.
1285
if argv is not None:
1287
_register_builtin_commands()
1288
ret = run_bzr_catch_errors(argv)
1289
trace.mutter("return code %d", ret)
560
from bzrlib.ui.text import TextUIFactory
561
## bzrlib.trace.enable_default_logging()
562
bzrlib.trace.log_startup(argv)
563
bzrlib.ui.ui_factory = TextUIFactory()
564
ret = run_bzr_catch_errors(argv[1:])
565
mutter("return code %d", ret)
1293
569
def run_bzr_catch_errors(argv):
1294
"""Run a bzr command with parameters as described by argv.
1296
This function assumed that that UI layer is setup, that symbol deprecations
1297
are already applied, and that unicode decoding has already been performed
1300
# done here so that they're covered for every test run
1301
install_bzr_command_hooks()
1302
return exception_to_return_code(run_bzr, argv)
1305
def run_bzr_catch_user_errors(argv):
1306
"""Run brz and report user errors, but let internal errors propagate.
1308
This is used for the test suite, and might be useful for other programs
1309
that want to wrap the commandline interface.
1311
# done here so that they're covered for every test run
1312
install_bzr_command_hooks()
1314
return run_bzr(argv)
1315
except Exception as e:
1316
if (isinstance(e, (OSError, IOError))
1317
or not getattr(e, 'internal_error', True)):
1318
trace.report_exception(sys.exc_info(), sys.stderr)
1324
class HelpCommandIndex(object):
1325
"""A index for bzr help that returns commands."""
1328
self.prefix = 'commands/'
1330
def get_topics(self, topic):
1331
"""Search for topic amongst commands.
1333
:param topic: A topic to search for.
1334
:return: A list which is either empty or contains a single
1337
if topic and topic.startswith(self.prefix):
1338
topic = topic[len(self.prefix):]
1340
cmd = _get_cmd_object(topic, check_missing=False)
574
# do this here inside the exception wrappers to catch EPIPE
577
# used to handle AssertionError and KeyboardInterrupt
578
# specially here, but hopefully they're handled ok by the logger now
580
if (isinstance(e, IOError)
581
and hasattr(e, 'errno')
582
and e.errno == errno.EPIPE):
583
bzrlib.trace.note('broken pipe')
1347
class Provider(object):
1348
"""Generic class to be overriden by plugins"""
1350
def plugin_for_command(self, cmd_name):
1351
"""Takes a command and returns the information for that plugin
1353
:return: A dictionary with all the available information
1354
for the requested plugin
1356
raise NotImplementedError
1359
class ProvidersRegistry(registry.Registry):
1360
"""This registry exists to allow other providers to exist"""
1363
for key, provider in self.items():
1367
command_providers_registry = ProvidersRegistry()
586
bzrlib.trace.log_exception()
587
if os.environ.get('BZR_PDB'):
588
print '**** entering debugger'
590
pdb.post_mortem(sys.exc_traceback)
593
if __name__ == '__main__':
594
sys.exit(main(sys.argv))
added
removed
bzrlib/commands.py
