/brz/remove-bazaar

# Copyright (C) 2009 Jelmer Vernooij <jelmer@samba.org>

# Based on the original from bzr-svn:

# Copyright (C) 2009 Lukas Lalinsky <lalinsky@gmail.com>

# Copyright (C) 2009 Jelmer Vernooij <jelmer@samba.org>

# 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

"""Support in "bzr send" for git-am style patches."""

import time

import bzrlib

from bzrlib import (

    branch as _mod_branch,

    diff as _mod_diff,

    merge_directive,

    osutils,

    revision as _mod_revision,

    )

from bzrlib.plugins.git import (

    version_info as bzr_git_version_info,

    )

from bzrlib.plugins.git.mapping import (

    object_mode,

    )

from bzrlib.plugins.git.object_store import (

    get_object_store,

    )

from cStringIO import StringIO

from dulwich import (

    __version__ as dulwich_version,

    )

from dulwich.objects import (

    Blob,

    )

version_tail = "bzr %s, bzr-git %d.%d.%d, dulwich %d.%d.%d" % (

    (bzrlib.__version__, ) + bzr_git_version_info[:3] + dulwich_version[:3])

class GitDiffTree(_mod_diff.DiffTree):

    """Provides a text representation between two trees, formatted for svn."""

    def _show_diff(self, specific_files, extra_trees):

        from dulwich.patch import write_blob_diff

        iterator = self.new_tree.iter_changes(self.old_tree,

            specific_files=specific_files, extra_trees=extra_trees,

            require_versioned=True)

        has_changes = 0

        def get_encoded_path(path):

            if path is not None:

                return path.encode(self.path_encoding, "replace")

        def get_file_mode(tree, path, kind, executable):

            if path is None:

                return None

            return object_mode(kind, executable)

        def get_blob(present, tree, file_id):

            if present is not None:

                return Blob.from_string(tree.get_file(file_id).read())

            else:

                return None

        trees = (self.old_tree, self.new_tree)

        for (file_id, paths, changed_content, versioned, parent, name, kind,

             executable) in iterator:

            # The root does not get diffed, and items with no known kind (that

            # is, missing) in both trees are skipped as well.

            if parent == (None, None) or kind == (None, None):

                continue

            path_encoded = (get_encoded_path(paths[0]), 

                            get_encoded_path(paths[1]))

            present = ((kind[0] is not None and versioned[0]),

                       (kind[1] is not None and versioned[1]))

            contents = (get_blob(present[0], trees[0], file_id),

                        get_blob(present[1], trees[1], file_id))

            renamed = (parent[0], name[0]) != (parent[1], name[1])

            mode = (get_file_mode(trees[0], path_encoded[0], 

                                  kind[0], executable[0]), 

                    get_file_mode(trees[1], path_encoded[1], 

                                  kind[1], executable[1]))

            write_blob_diff(self.to_file, 

                (path_encoded[0], mode[0], contents[0]), 

                (path_encoded[1], mode[1], contents[1]))

            has_changes |= (changed_content or renamed)

        return has_changes

class GitMergeDirective(merge_directive._BaseMergeDirective):

    def to_lines(self):

        return self.patch.splitlines(True)

    @classmethod

    def _generate_commit(cls, repository, revision_id, num, total):

        s = StringIO()

        store = get_object_store(repository)

        commit = store[store._lookup_revision_sha1(revision_id)]

        from dulwich.patch import write_commit_patch, get_summary

        try:

            lhs_parent = repository.get_revision(revision_id).parent_ids[0]

        except IndexError:

            lhs_parent = _mod_revision.NULL_REVISION

        tree_1 = repository.revision_tree(lhs_parent)

        tree_2 = repository.revision_tree(revision_id)

        contents = StringIO()

        differ = GitDiffTree.from_trees_options(tree_1, tree_2, 

                contents, 'utf8', None, 'a/', 'b/', None)

        differ.show_diff(None, None)

        write_commit_patch(s, commit, contents.getvalue(), (num, total), 

                           version_tail)

        summary = "%04d-%s" % (num, get_summary(commit))

        return summary, s.getvalue()

    @classmethod

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

                     target_branch, local_target_branch=None,

                     public_branch=None, message=None):

        patches = []

        submit_branch = _mod_branch.Branch.open(target_branch)

        submit_branch.lock_read()

        try:

            submit_revision_id = submit_branch.last_revision()

            repository.fetch(submit_branch.repository, submit_revision_id)

            graph = repository.get_graph()

            todo = graph.find_difference(submit_revision_id, revision_id)[1]

            total = len(todo)

            for i, revid in enumerate(graph.iter_topo_order(todo)):

                patches.append(cls._generate_commit(repository, revid, i+1, 

                                                    total))

        finally:

            submit_branch.unlock()

        return cls(revision_id, None, time, timezone, target_branch, 

            "".join([patch for (summary, patch) in patches]), 

            None, public_branch, message)

def send_git(branch, revision_id, submit_branch, public_branch,

              no_patch, no_bundle, message, base_revision_id):

    return GitMergeDirective.from_objects(

        branch.repository, revision_id, time.time(),

        osutils.local_time_offset(), submit_branch,

        public_branch=public_branch, message=message)