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# Copyright (C) 2009-2011 Gianluca Montecchi <gian@grys.it>
#                         W. Trevor King <wking@drexel.edu>
#
# This file is part of Bugs Everywhere.
#
# Bugs Everywhere 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.
#
# Bugs Everywhere 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 Bugs Everywhere.  If not, see <http://www.gnu.org/licenses/>.

import sys

import libbe
import libbe.bugdir
import libbe.command
import libbe.command.util
import libbe.storage
import libbe.ui.util.editor


class Commit (libbe.command.Command):
    """Commit the currently pending changes to the repository

    >>> import sys
    >>> import libbe.bugdir
    >>> bd = libbe.bugdir.SimpleBugDir(memory=False, versioned=True)
    >>> io = libbe.command.StringInputOutput()
    >>> io.stdout = sys.stdout
    >>> ui = libbe.command.UserInterface(io=io)
    >>> ui.storage_callbacks.set_storage(bd.storage)
    >>> cmd = Commit(ui=ui)

    >>> bd.extra_strings = ['hi there']
    >>> bd.flush_reload()
    >>> ui.run(cmd, args=['Making a commit']) # doctest: +ELLIPSIS
    Committed ...
    >>> ui.cleanup()
    >>> bd.cleanup()
    """
    name = 'commit'

    def __init__(self, *args, **kwargs):
        libbe.command.Command.__init__(self, *args, **kwargs)
        self.options.extend([
                libbe.command.Option(name='body', short_name='b',
                    help='Provide the detailed body for the commit message.  In the special case that FILE == "EDITOR", spawn an editor to enter the body text (in which case you cannot use stdin for the summary)',
                    arg=libbe.command.Argument(name='body', metavar='FILE',
                        completion_callback=libbe.command.util.complete_path)),
                libbe.command.Option(name='allow-empty', short_name='a',
                                     help='Allow empty commits'),
                 ])
        self.args.extend([
                libbe.command.Argument(
                    name='comment', metavar='COMMENT', default=None),
                ])

    def _run(self, **params):
        if params['comment'] == '-': # read summary from stdin
            assert params['body'] != 'EDITOR', \
                'Cannot spawn and editor when the summary is using stdin.'
            summary = sys.stdin.readline()
        else:
            summary = params['comment']
        storage = self._get_storage()
        if params['body'] == None:
            body = None
        elif params['body'] == 'EDITOR':
            body = libbe.ui.util.editor.editor_string(
                'Please enter your commit message above')
        else:
            self._check_restricted_access(storage, params['body'])
            body = libbe.util.encoding.get_file_contents(
                params['body'], decode=True)
        try:
            revision = storage.commit(summary, body=body,
                                      allow_empty=params['allow-empty'])
            print >> self.stdout, 'Committed %s' % revision
        except libbe.storage.EmptyCommit, e:
            print >> self.stdout, e
            return 1

    def _long_help(self):
        return """
Commit the current repository status.  The summary specified on the
commandline is a string (only one line) that describes the commit
briefly or "-", in which case the string will be read from stdin.
"""