/brz/remove-bazaar

from StringIO import StringIO

from bzrlib import (

    branch as _mod_branch,

    diff,

    errors,

    gpg,

    revision as _mod_revision,

    rio,

    testament,

    )

from bzrlib.bundle import serializer as bundle_serializer

class MergeDirective(object):

    _format_string = 'Bazaar merge directive format experimental-1'

    def __init__(self, revision_id, testament_sha1, time, timezone,

                 target_branch, patch=None, patch_type=None,

                 source_branch=None):

        assert isinstance(time, float)

        assert patch_type in (None, 'diff', 'bundle')

        if patch_type != 'bundle' and source_branch is None:

            raise errors.NoMergeSource()

        if patch_type is not None and patch is None:

            raise errors.PatchMissing(patch_type)

        self.revision_id = revision_id

        self.testament_sha1 = testament_sha1

        self.time = time

        self.timezone = timezone

        self.target_branch = target_branch

        self.patch = patch

        self.patch_type = patch_type

        self.source_branch = source_branch

    @classmethod

    def from_lines(klass, lines):

        assert lines[0].startswith('# ' + klass._format_string + '\n')

        line_iter = iter(lines[1:])

        stanza = rio.read_patch_stanza(line_iter)

        patch_lines = list(line_iter)

        if len(patch_lines) == 0:

            patch = None

        else:

            patch = ''.join(patch_lines)

        try:

            bundle_serializer.read_bundle(StringIO(patch))

        except errors.NotABundle:

            patch_type = 'diff'

        else:

            patch_type = 'bundle'

        time, timezone = bundle_serializer.unpack_highres_date(

            stanza.get('timestamp'))

        kwargs = {}

        for key in ('revision_id', 'testament_sha1', 'target_branch',

                    'source_branch'):

            try:

                kwargs[key] = stanza.get(key)

            except KeyError:

                pass

        return MergeDirective(time=time, timezone=timezone,

                              patch_type=patch_type, patch=patch, **kwargs)

    def to_lines(self):

        timestamp = bundle_serializer.format_highres_date(self.time,

                                                          self.timezone)

        stanza = rio.Stanza(revision_id=self.revision_id, timestamp=timestamp,

                            target_branch=self.target_branch,

                            testament_sha1=self.testament_sha1)

        for key in ('source_branch',):

            if self.__dict__[key] is not None:

                stanza.add(key, self.__dict__[key])

        lines = ['# ' + self._format_string + '\n']

        lines.extend(rio.to_patch_lines(stanza))

        lines.append('# \n')

        if self.patch is not None:

            lines.extend(self.patch.splitlines(True))

        return lines

    def to_signed(self, branch):

        my_gpg = gpg.GPGStrategy(branch.get_config())

        return my_gpg.sign(''.join(self.to_lines()))

    @classmethod

    def from_objects(klass, repository, revision_id, time, timezone,

                 target_branch, patch_type='bundle',

                 local_target_branch=None, public_branch=None):

        if public_branch is not None:

            source_branch = public_branch.base

            if not public_branch.repository.has_revision(revision_id):

                raise errors.PublicBranchOutOfDate(source_branch,

                                                   revision_id)

        else:

            source_branch = None

        t = testament.StrictTestament3.from_revision(repository, revision_id)

        if patch_type is None:

            patch = None

        else:

            submit_branch = _mod_branch.Branch.open(target_branch)

            submit_revision_id = submit_branch.last_revision()

            repository.fetch(submit_branch.repository, submit_revision_id)

            ancestor_id = _mod_revision.common_ancestor(revision_id,

                                                        submit_revision_id,

                                                        repository)

            if patch_type == 'bundle':

                s = StringIO()

                bundle_serializer.write_bundle(repository, revision_id,

                                               ancestor_id, s)

                patch = s.getvalue()

            elif patch_type == 'diff':

                patch = klass._generate_diff(repository, revision_id,

                                             ancestor_id)

        return MergeDirective(revision_id, t.as_sha1(), time, timezone,

                              target_branch, patch, patch_type, source_branch)

    @staticmethod

    def _generate_diff(repository, revision_id, ancestor_id):

        tree_1 = repository.revision_tree(ancestor_id)

        tree_2 = repository.revision_tree(revision_id)

        s = StringIO()

        diff.show_diff_trees(tree_1, tree_2, s)

        return s.getvalue()