~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2004, 2005, 2006 Canonical Ltd

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

# TODO: For things like --diff-prefix, we want a way to customize the display

# of the option argument.

import re

from bzrlib.lazy_import import lazy_import

lazy_import(globals(), """

import optparse

from bzrlib import (

    errors,

    log,

    registry,

    revisionspec,

    symbol_versioning,

    )

""")

from bzrlib.trace import warning

def _parse_revision_str(revstr):

    """This handles a revision string -> revno.

    This always returns a list.  The list will have one element for

    each revision specifier supplied.

    >>> _parse_revision_str('234')

    [<RevisionSpec_revno 234>]

    >>> _parse_revision_str('234..567')

    [<RevisionSpec_revno 234>, <RevisionSpec_revno 567>]

    >>> _parse_revision_str('..')

    [<RevisionSpec None>, <RevisionSpec None>]

    >>> _parse_revision_str('..234')

    [<RevisionSpec None>, <RevisionSpec_revno 234>]

    >>> _parse_revision_str('234..')

    [<RevisionSpec_revno 234>, <RevisionSpec None>]

    >>> _parse_revision_str('234..456..789') # Maybe this should be an error

    [<RevisionSpec_revno 234>, <RevisionSpec_revno 456>, <RevisionSpec_revno 789>]

    >>> _parse_revision_str('234....789') #Error ?

    [<RevisionSpec_revno 234>, <RevisionSpec None>, <RevisionSpec_revno 789>]

    >>> _parse_revision_str('revid:test@other.com-234234')

    [<RevisionSpec_revid revid:test@other.com-234234>]

    >>> _parse_revision_str('revid:test@other.com-234234..revid:test@other.com-234235')

    [<RevisionSpec_revid revid:test@other.com-234234>, <RevisionSpec_revid revid:test@other.com-234235>]

    >>> _parse_revision_str('revid:test@other.com-234234..23')

    [<RevisionSpec_revid revid:test@other.com-234234>, <RevisionSpec_revno 23>]

    >>> _parse_revision_str('date:2005-04-12')

    [<RevisionSpec_date date:2005-04-12>]

    >>> _parse_revision_str('date:2005-04-12 12:24:33')

    [<RevisionSpec_date date:2005-04-12 12:24:33>]

    >>> _parse_revision_str('date:2005-04-12T12:24:33')

    [<RevisionSpec_date date:2005-04-12T12:24:33>]

    >>> _parse_revision_str('date:2005-04-12,12:24:33')

    [<RevisionSpec_date date:2005-04-12,12:24:33>]

    >>> _parse_revision_str('-5..23')

    [<RevisionSpec_revno -5>, <RevisionSpec_revno 23>]

    >>> _parse_revision_str('-5')

    [<RevisionSpec_revno -5>]

    >>> _parse_revision_str('123a')

    Traceback (most recent call last):

      ...

    NoSuchRevisionSpec: No namespace registered for string: '123a'

    >>> _parse_revision_str('abc')

    Traceback (most recent call last):

      ...

    NoSuchRevisionSpec: No namespace registered for string: 'abc'

    >>> _parse_revision_str('branch:../branch2')

    [<RevisionSpec_branch branch:../branch2>]

    >>> _parse_revision_str('branch:../../branch2')

    [<RevisionSpec_branch branch:../../branch2>]

    >>> _parse_revision_str('branch:../../branch2..23')

    [<RevisionSpec_branch branch:../../branch2>, <RevisionSpec_revno 23>]

    """

    # TODO: Maybe move this into revisionspec.py

    revs = []

    # split on the first .. that is not followed by a / ?

    sep = re.compile("\\.\\.(?!/)")

    for x in sep.split(revstr):

        revs.append(revisionspec.RevisionSpec.from_string(x or None))

    return revs

def _parse_merge_type(typestring):

    return get_merge_type(typestring)

def get_merge_type(typestring):

    """Attempt to find the merge class/factory associated with a string."""

    from merge import merge_types

    try:

        return merge_types[typestring][0]

    except KeyError:

        templ = '%s%%7s: %%s' % (' '*12)

        lines = [templ % (f[0], f[1][1]) for f in merge_types.iteritems()]

        type_list = '\n'.join(lines)

        msg = "No known merge type %s. Supported types are:\n%s" %\

            (typestring, type_list)

        raise errors.BzrCommandError(msg)

class Option(object):

    """Description of a command line option

    :ivar _short_name: If this option has a single-letter name, this is it.

    Otherwise None.

    """

    # TODO: Some way to show in help a description of the option argument

    OPTIONS = {}

    def __init__(self, name, help='', type=None, argname=None,

                 short_name=None):

        """Make a new command option.

        name -- regular name of the command, used in the double-dash

            form and also as the parameter to the command's run() 

            method.

        help -- help message displayed in command help

        type -- function called to parse the option argument, or 

            None (default) if this option doesn't take an argument.

        argname -- name of option argument, if any

        """

        self.name = name

        self.help = help

        self.type = type

        self._short_name = short_name

        if type is None:

            assert argname is None

        elif argname is None:

            argname = 'ARG'

        self.argname = argname

    def short_name(self):

        if self._short_name:

            return self._short_name

        else:

            # remove this when SHORT_OPTIONS is removed

            # XXX: This is accessing a DeprecatedDict, so we call the super 

            # method to avoid warnings

            for (k, v) in dict.iteritems(Option.SHORT_OPTIONS):

                if v == self:

                    return k

    def set_short_name(self, short_name):

        self._short_name = short_name

    def get_negation_name(self):

        if self.name.startswith('no-'):

            return self.name[3:]

        else:

            return 'no-' + self.name

    def add_option(self, parser, short_name):

        """Add this option to an Optparse parser"""

        option_strings = ['--%s' % self.name]

        if short_name is not None:

            option_strings.append('-%s' % short_name)

        optargfn = self.type

        if optargfn is None:

            parser.add_option(action='store_true', dest=self.name, 

                              help=self.help,

                              default=OptionParser.DEFAULT_VALUE,

                              *option_strings)

            negation_strings = ['--%s' % self.get_negation_name()]

            parser.add_option(action='store_false', dest=self.name, 

                              help=optparse.SUPPRESS_HELP, *negation_strings)

        else:

            parser.add_option(action='callback', 

                              callback=self._optparse_callback, 

                              type='string', metavar=self.argname.upper(),

                              help=self.help,

                              default=OptionParser.DEFAULT_VALUE, 

                              *option_strings)

    def _optparse_callback(self, option, opt, value, parser):

        setattr(parser.values, self.name, self.type(value))

    def iter_switches(self):

        """Iterate through the list of switches provided by the option

        :return: an iterator of (name, short_name, argname, help)

        """

        argname =  self.argname

        if argname is not None:

            argname = argname.upper()

        yield self.name, self.short_name(), argname, self.help

class ListOption(Option):

    """Option used to provide a list of values.

    On the command line, arguments are specified by a repeated use of the

    option. '-' is a special argument that resets the list. For example,

      --foo=a --foo=b

    sets the value of the 'foo' option to ['a', 'b'], and

      --foo=a --foo=b --foo=- --foo=c

    sets the value of the 'foo' option to ['c'].

    """

    def add_option(self, parser, short_name):

        """Add this option to an Optparse parser."""

        option_strings = ['--%s' % self.name]

        if short_name is not None:

            option_strings.append('-%s' % short_name)

        parser.add_option(action='callback',

                          callback=self._optparse_callback,

                          type='string', metavar=self.argname.upper(),

                          help=self.help, default=[],

                          *option_strings)

    def _optparse_callback(self, option, opt, value, parser):

        values = getattr(parser.values, self.name)

        if value == '-':

            del values[:]

        else:

            values.append(self.type(value))

class RegistryOption(Option):

    """Option based on a registry

    The values for the options correspond to entries in the registry.  Input

    must be a registry key.  After validation, it is converted into an object

    using Registry.get or a caller-provided converter.

    """

    def validate_value(self, value):

        """Validate a value name"""

        if value not in self.registry:

            raise errors.BadOptionValue(self.name, value)

    def convert(self, value):

        """Convert a value name into an output type"""

        self.validate_value(value)

        if self.converter is None:

            return self.registry.get(value)

        else:

            return self.converter(value)

    def __init__(self, name, help, registry, converter=None,

        value_switches=False, title=None, enum_switch=True):

        """

        Constructor.

        :param name: The option name.

        :param help: Help for the option.

        :param registry: A Registry containing the values

        :param converter: Callable to invoke with the value name to produce

            the value.  If not supplied, self.registry.get is used.

        :param value_switches: If true, each possible value is assigned its

            own switch.  For example, instead of '--format knit',

            '--knit' can be used interchangeably.

        :param enum_switch: If true, a switch is provided with the option name,

            which takes a value.

        """

        Option.__init__(self, name, help, type=self.convert)

        self.registry = registry

        self.name = name

        self.converter = converter

        self.value_switches = value_switches

        self.enum_switch = enum_switch

        self.title = title

        if self.title is None:

            self.title = name

    @staticmethod

    def from_kwargs(name_, help=None, title=None, value_switches=False,

                    enum_switch=True, **kwargs):

        """Convenience method to generate string-map registry options

        name, help, value_switches and enum_switch are passed to the

        RegistryOption constructor.  Any other keyword arguments are treated

        as values for the option, and they value is treated as the help.

        """

        reg = registry.Registry()

        for name, help in kwargs.iteritems():

            name = name.replace('_', '-')

            reg.register(name, name, help=help)

        return RegistryOption(name_, help, reg, title=title,

            value_switches=value_switches, enum_switch=enum_switch)

    def add_option(self, parser, short_name):

        """Add this option to an Optparse parser"""

        if self.value_switches:

            parser = parser.add_option_group(self.title)

        if self.enum_switch:

            Option.add_option(self, parser, short_name)

        if self.value_switches:

            for key in self.registry.keys():

                option_strings = ['--%s' % key]

                if getattr(self.registry.get_info(key), 'hidden', False):

                    help = optparse.SUPPRESS_HELP

                else:

                    help = self.registry.get_help(key)

                parser.add_option(action='callback',

                              callback=self._optparse_value_callback(key),

                                  help=help,

                                  *option_strings)

    def _optparse_value_callback(self, cb_value):

        def cb(option, opt, value, parser):

            setattr(parser.values, self.name, self.type(cb_value))

        return cb

    def iter_switches(self):

        """Iterate through the list of switches provided by the option

        :return: an iterator of (name, short_name, argname, help)

        """

        for value in Option.iter_switches(self):

            yield value

        if self.value_switches:

            for key in sorted(self.registry.keys()):

                yield key, None, None, self.registry.get_help(key)

class OptionParser(optparse.OptionParser):

    """OptionParser that raises exceptions instead of exiting"""

    DEFAULT_VALUE = object()

    def error(self, message):

        raise errors.BzrCommandError(message)

def get_optparser(options):

    """Generate an optparse parser for bzrlib-style options"""

    parser = OptionParser()

    parser.remove_option('--help')

    for option in options.itervalues():

        option.add_option(parser, option.short_name())

    return parser

def _global_option(name, **kwargs):

    """Register o as a global option."""

    Option.OPTIONS[name] = Option(name, **kwargs)

def _global_registry_option(name, help, registry, **kwargs):

    Option.OPTIONS[name] = RegistryOption(name, help, registry, **kwargs)

class MergeTypeRegistry(registry.Registry):

    pass

_merge_type_registry = MergeTypeRegistry()

_merge_type_registry.register_lazy('merge3', 'bzrlib.merge', 'Merge3Merger',

                                   "Native diff3-style merge")

_merge_type_registry.register_lazy('diff3', 'bzrlib.merge', 'Diff3Merger',

                                   "Merge using external diff3")

_merge_type_registry.register_lazy('weave', 'bzrlib.merge', 'WeaveMerger',

                                   "Weave-based merge")

_global_option('all')

_global_option('overwrite', help='Ignore differences between branches and '

               'overwrite unconditionally')

_global_option('basis', type=str)

_global_option('bound')

_global_option('diff-options', type=str)

_global_option('help',

               help='show help message',

               short_name='h')

_global_option('file', type=unicode, short_name='F')

_global_option('force')

_global_option('format', type=unicode)

_global_option('forward')

_global_option('message', type=unicode,

               short_name='m')

_global_option('no-recurse')

_global_option('profile',

               help='show performance profiling information')

_global_option('revision',

               type=_parse_revision_str,

               short_name='r',

               help='See \'help revisionspec\' for details')

_global_option('show-ids', 

               help='show internal object ids')

_global_option('timezone', 

               type=str,

               help='display timezone as local, original, or utc')

_global_option('unbound')

_global_option('verbose',

               help='display more information',

               short_name='v')

_global_option('version')

_global_option('email')

_global_option('update')

_global_registry_option('log-format', "Use this log format",

                        log.log_formatter_registry, value_switches=True,

                        title='Log format')

_global_option('long', help='Use detailed log format. Same as --log-format long',

               short_name='l')

_global_option('short', help='Use moderately short log format. Same as --log-format short')

_global_option('line', help='Use log format with one line per revision. Same as --log-format line')

_global_option('root', type=str)

_global_option('no-backup')

_global_registry_option('merge-type', 'Select a particular merge algorithm',

                        _merge_type_registry, value_switches=True,

                        title='Merge algorithm')

_global_option('pattern', type=str)

_global_option('quiet', short_name='q')

_global_option('remember', help='Remember the specified location as a'

               ' default.')

_global_option('reprocess', help='Reprocess to reduce spurious conflicts')

_global_option('kind', type=str)

_global_option('dry-run',

               help="show what would be done, but don't actually do anything")

_global_option('name-from-revision', help='The path name in the old tree.')

# prior to 0.14 these were always globally registered; the old dict is

# available for plugins that use it but it should not be used.

Option.SHORT_OPTIONS = symbol_versioning.DeprecatedDict(

    symbol_versioning.zero_fourteen,

    'SHORT_OPTIONS',

    {

        'F': Option.OPTIONS['file'],

        'h': Option.OPTIONS['help'],

        'm': Option.OPTIONS['message'],

        'r': Option.OPTIONS['revision'],

        'v': Option.OPTIONS['verbose'],

        'l': Option.OPTIONS['long'],

        'q': Option.OPTIONS['quiet'],

    },

    'Set the short option name when constructing the Option.',

    )