bzr delta

__init__.py

from bzrlib.commands import plugin_cmds
plugin_cmds.register_lazy('cmd_delta', [],
                          'bzrlib.plugins.delta.delta')

readme

bzrのプラグインフォルダにdeltaというフォルダを作り、上の2ファイルを置く

で、
$ bzr delta ブランチのパス -r -3..-1 --output 出力先
とか

delta.py

import os, errno
from bzrlib import osutils, errors
from bzrlib.commands import Command
from bzrlib.option import (Option, ListOption)

class cmd_delta(Command):
    """
    Export delta between 2 revisions
    """

    takes_args = ["location?"]
    takes_options = [
        'verbose', 'revision', 
        Option('output', type=str, short_name='o', help='output directory'),
    ]

    def run(self, location=None, revision=None, output=None, verbose=None):
        if not output:
            raise errors.BzrError("output does not specified")
        if os.path.exists(output):
            raise errors.BzrError("%s is already exists" % output)

        self.location = location or "."
        self.output = output
        from bzrlib.diff import get_trees_and_branches_to_diff_locked
        cleanup = []
        try:
            old_tree, new_tree = \
                get_trees_and_branches_to_diff_locked(
                        None, revision, location, location, cleanup.append)[:2]

            changes = new_tree.iter_changes(old_tree, require_versioned=True)
            for (file_id, paths, _, versioned, _, name, kind, _) in changes:
                if versioned[1] and kind[1] == 'file':
                    self.write_file(file_id, new_tree, paths[1])

        finally:
            while cleanup:
                cleanup.pop()()

    def write_file(self, file_id, tree, relpath):
        full_path = osutils.pathjoin(self.output, relpath)
        if self.outf:
            self.outf.write("writing %s\n" % full_path)
        parent_dir = osutils.dirname(full_path)
        try:
            os.makedirs(parent_dir)
        except OSError, e:
            if e.errno != errno.EEXIST:
                raise
        source = tree.get_file(file_id, relpath)
        try:
            target = open(full_path, 'wb')
            try:
                osutils.pumpfile(source, target)
            finally:
                target.close()
        finally:
            source.close()
        try:
            mtime = tree.get_file_mtime(file_id)
        except errors.FileTimestampUnavailable:
            pass
        else:
            os.utime(full_path, (mtime, mtime))