~abentley/bzrtools/bzrtools.dev

# Copyright (C) 2005, 2008 Aaron Bentley, 2006 Michael Ellerman

# <aaron@aaronbentley.com>

#

#    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

import sys

import subprocess

import bzrlib.add

from bzrlib.plugins.bzrtools.bzrtools import open_from_url

from errors import PatchFailed, PatchInvokeError

def patch(tree, location, strip, quiet=False):

    """Apply a patch to a branch, using patch(1).  URLs may be used."""

    my_file = None

    if location is None:

        my_file = sys.stdin

    else:

        my_file = open_from_url(location)

    patches = [my_file.read()]

    return run_patch(tree.basedir, patches, strip, quiet=quiet)

def run_patch(directory, patches, strip=0, reverse=False, dry_run=False,

              quiet=False, _patch_cmd='patch', target_file=None):

    args = [_patch_cmd, '-d', directory, '-s', '-p%d' % strip, '-f']

    if quiet:

        args.append('--quiet')

    if sys.platform == "win32":

        args.append('--binary')

    if reverse:

        args.append('-R')

    if dry_run:

        if sys.platform.startswith('freebsd'):

            args.append('--check')

        else:

            args.append('--dry-run')

        stderr = subprocess.PIPE

    else:

        stderr = None

    if target_file is not None:

        args.append(target_file)

    try:

        process = subprocess.Popen(args, stdin=subprocess.PIPE,

                                   stdout=subprocess.PIPE, stderr=stderr)

    except OSError, e:

        raise PatchInvokeError(e)

    try:

        for patch in patches:

            process.stdin.write(str(patch))

        process.stdin.close()

    except IOError, e:

        raise PatchInvokeError(e, process.stderr.read())

    result = process.wait()

    if not dry_run:

        sys.stdout.write(process.stdout.read())

    if result != 0:

        raise PatchFailed()

    return result