~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005-2010 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

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

# of the option argument.

from __future__ import absolute_import

import optparse

import re

from bzrlib.lazy_import import lazy_import

lazy_import(globals(), """

from bzrlib import (

    errors,

    revisionspec,

    i18n,

    )

""")

from bzrlib import (

    registry as _mod_registry,

    )

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_dwim 234>]

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

    [<RevisionSpec_dwim 234>, <RevisionSpec_dwim 567>]

    >>> _parse_revision_str('..')

    [<RevisionSpec None>, <RevisionSpec None>]

    >>> _parse_revision_str('..234')

    [<RevisionSpec None>, <RevisionSpec_dwim 234>]

    >>> _parse_revision_str('234..')

    [<RevisionSpec_dwim 234>, <RevisionSpec None>]

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

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

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

    [<RevisionSpec_dwim 234>, <RevisionSpec None>, <RevisionSpec_dwim 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_dwim 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_dwim -5>, <RevisionSpec_dwim 23>]

    >>> _parse_revision_str('-5')

    [<RevisionSpec_dwim -5>]

    >>> _parse_revision_str('123a')

    [<RevisionSpec_dwim 123a>]

    >>> _parse_revision_str('abc')

    [<RevisionSpec_dwim 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_dwim 23>]

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

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

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

    [<RevisionSpec_branch branch:..\\..\\branch2>, <RevisionSpec_dwim 23>]

    """

    # TODO: Maybe move this into revisionspec.py

    revs = []

    # split on .. that is not followed by a / or \

    sep = re.compile(r'\.\.(?![\\/])')

    for x in sep.split(revstr):

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

    return revs

def _parse_change_str(revstr):

    """Parse the revision string and return a tuple with left-most

    parent of the revision.

    >>> _parse_change_str('123')

    (<RevisionSpec_before before:123>, <RevisionSpec_dwim 123>)

    >>> _parse_change_str('123..124')

    Traceback (most recent call last):

      ...

    RangeInChangeOption: Option --change does not accept revision ranges

    """

    revs = _parse_revision_str(revstr)

    if len(revs) > 1:

        raise errors.RangeInChangeOption()

    return (revisionspec.RevisionSpec.from_string('before:' + revstr),

            revs[0])

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.

    """

    # The dictionary of standard options. These are always legal.

    STD_OPTIONS = {}

    # The dictionary of commonly used options. these are only legal

    # if a command explicitly references them by name in the list

    # of supported options.

    OPTIONS = {}

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

                 short_name=None, param_name=None, custom_callback=None,

                 hidden=False):

        """Make a new command option.

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

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

            method (unless param_name is specified).

        :param help: help message displayed in command help

        :param type: function called to parse the option argument, or

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

        :param argname: name of option argument, if any

        :param short_name: short option code for use with a single -, e.g.

            short_name="v" to enable parsing of -v.

        :param param_name: name of the parameter which will be passed to

            the command's run() method.

        :param custom_callback: a callback routine to be called after normal

            processing. The signature of the callback routine is

            (option, name, new_value, parser).

        :param hidden: If True, the option should be hidden in help and

            documentation.

        """

        self.name = name

        self.help = help

        self.type = type

        self._short_name = short_name

        if type is None:

            if argname:

                raise ValueError('argname not valid for booleans')

        elif argname is None:

            argname = 'ARG'

        self.argname = argname

        if param_name is None:

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

        else:

            self._param_name = param_name

        self.custom_callback = custom_callback

        self.hidden = hidden

    def short_name(self):

        if self._short_name:

            return self._short_name

    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)

        if self.hidden:

            help = optparse.SUPPRESS_HELP

        else:

            help = self.help

        optargfn = self.type

        if optargfn is None:

            parser.add_option(action='callback',

                              callback=self._optparse_bool_callback,

                              callback_args=(True,),

                              help=help,

                              *option_strings)

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

            parser.add_option(action='callback',

                              callback=self._optparse_bool_callback,

                              callback_args=(False,),

                              help=optparse.SUPPRESS_HELP, *negation_strings)

        else:

            parser.add_option(action='callback',

                              callback=self._optparse_callback,

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

                              help=help,

                              default=OptionParser.DEFAULT_VALUE,

                              *option_strings)

    def _optparse_bool_callback(self, option, opt_str, value, parser, bool_v):

        setattr(parser.values, self._param_name, bool_v)

        if self.custom_callback is not None:

            self.custom_callback(option, self._param_name, bool_v, parser)

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

        v = self.type(value)

        setattr(parser.values, self._param_name, v)

        if self.custom_callback is not None:

            self.custom_callback(option, self.name, v, parser)

    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

    def is_hidden(self, name):

        return self.hidden

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, dest=self._param_name, default=[],

                          *option_strings)

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

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

        if value == '-':

            del values[:]

        else:

            values.append(self.type(value))

        if self.custom_callback is not None:

            self.custom_callback(option, self._param_name, values, parser)

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=None, converter=None,

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

        lazy_registry=None, short_name=None, short_value_switches=None):

        """

        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.

        :param lazy_registry: A tuple of (module name, attribute name) for a

            registry to be lazily loaded.

        :param short_name: The short name for the enum switch, if any

        :param short_value_switches: A dict mapping values to short names

        """

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

                        short_name=short_name)

        self._registry = registry

        if registry is None:

            if lazy_registry is None:

                raise AssertionError(

                    'One of registry or lazy_registry must be given.')

            self._lazy_registry = _mod_registry._LazyObjectGetter(

                *lazy_registry)

        if registry is not None and lazy_registry is not None:

            raise AssertionError(

                'registry and lazy_registry are mutually exclusive')

        self.name = name

        self.converter = converter

        self.value_switches = value_switches

        self.enum_switch = enum_switch

        self.short_value_switches = short_value_switches

        self.title = title

        if self.title is None:

            self.title = name

    @property

    def registry(self):

        if self._registry is None:

            self._registry = self._lazy_registry.get_obj()

        return self._registry

    @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 their value is treated as the help.

        """

        reg = _mod_registry.Registry()

        for name, switch_help in sorted(kwargs.items()):

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

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

            if not value_switches:

                help = help + '  "' + name + '": ' + switch_help

                if not help.endswith("."):

                    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 self.is_hidden(key):

                    help = optparse.SUPPRESS_HELP

                else:

                    help = self.registry.get_help(key)

                if (self.short_value_switches and

                    key in self.short_value_switches):

                    option_strings.append('-%s' %

                                          self.short_value_switches[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):

            v = self.type(cb_value)

            setattr(parser.values, self._param_name, v)

            if self.custom_callback is not None:

                self.custom_callback(option, self._param_name, v, parser)

        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)

    def is_hidden(self, name):

        if name == self.name:

            return Option.is_hidden(self, name)

        return getattr(self.registry.get_info(name), 'hidden', False)

class OptionParser(optparse.OptionParser):

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

    DEFAULT_VALUE = object()

    def __init__(self):

        optparse.OptionParser.__init__(self)

        self.formatter = GettextIndentedHelpFormatter()

    def error(self, message):

        raise errors.BzrCommandError(message)

class GettextIndentedHelpFormatter(optparse.IndentedHelpFormatter):

    """Adds gettext() call to format_option()"""

    def __init__(self):

        optparse.IndentedHelpFormatter.__init__(self)

    def format_option(self, option):

        """code taken from Python's optparse.py"""

        if option.help:

            option.help = i18n.gettext(option.help)

        return optparse.IndentedHelpFormatter.format_option(self, option)

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 custom_help(name, help):

    """Clone a common option overriding the help."""

    import copy

    o = copy.copy(Option.OPTIONS[name])

    o.help = help

    return o

def _standard_option(name, **kwargs):

    """Register a standard option."""

    # All standard options are implicitly 'global' ones

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

    Option.OPTIONS[name] = Option.STD_OPTIONS[name]

def _standard_list_option(name, **kwargs):

    """Register a standard option."""

    # All standard options are implicitly 'global' ones

    Option.STD_OPTIONS[name] = ListOption(name, **kwargs)

    Option.OPTIONS[name] = Option.STD_OPTIONS[name]

def _global_option(name, **kwargs):

    """Register a global option."""

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

def _global_registry_option(name, help, registry=None, **kwargs):

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

# This is the verbosity level detected during command line parsing.

# Note that the final value is dependent on the order in which the

# various flags (verbose, quiet, no-verbose, no-quiet) are given.

# The final value will be one of the following:

#

# * -ve for quiet

# * 0 for normal

# * +ve for verbose

_verbosity_level = 0

def _verbosity_level_callback(option, opt_str, value, parser):

    global _verbosity_level

    if not value:

        # Either --no-verbose or --no-quiet was specified

        _verbosity_level = 0

    elif opt_str == "verbose":

        if _verbosity_level > 0:

            _verbosity_level += 1

        else:

            _verbosity_level = 1

    else:

        if _verbosity_level < 0:

            _verbosity_level -= 1

        else:

            _verbosity_level = -1

# Declare the standard options

_standard_option('help', short_name='h',

                 help='Show help message.')

_standard_option('quiet', short_name='q',

                 help="Only display errors and warnings.",

                 custom_callback=_verbosity_level_callback)

_standard_option('usage',

                 help='Show usage message and options.')

_standard_option('verbose', short_name='v',

                 help='Display more information.',

                 custom_callback=_verbosity_level_callback)

# Declare commonly used options

_global_option('change',

               type=_parse_change_str,

               short_name='c',

               param_name='revision',

               help='Select changes introduced by the specified revision. See also "help revisionspec".')

_global_option('directory', short_name='d', type=unicode,

               help='Branch to operate on, instead of working directory.')

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

_global_registry_option('log-format', "Use specified log format.",

                        lazy_registry=('bzrlib.log', 'log_formatter_registry'),

                        value_switches=True, title='Log format',

                        short_value_switches={'short': 'S'})

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

                        lazy_registry=('bzrlib.merge', 'merge_type_registry'),

                        value_switches=True, title='Merge algorithm')

_global_option('message', type=unicode,

               short_name='m',

               help='Message string.')

_global_option('null', short_name='0',

                 help='Use an ASCII NUL (\\0) separator rather than '

                      'a newline.')

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

               'overwrite unconditionally.')

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

               ' default.')

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

_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.')

diff_writer_registry = _mod_registry.Registry()

diff_writer_registry.register('plain', lambda x: x, 'Plaintext diff output.')

diff_writer_registry.default_key = 'plain'