/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.objects import (

    Blob,

    )

class GitDiffTree(_mod_diff.DiffTree):

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

    def __init__(self, old_tree, new_tree, to_file, path_encoding='utf-8',

                 diff_text=None, extra_factories=None):

        super(GitDiffTree, self).__init__(old_tree, new_tree, to_file, path_encoding,

            diff_text, extra_factories)

    def _write_file_mode(self, old_mode, new_mode):

        if old_mode == new_mode:

            return

        if new_mode is not None:

            if old_mode is not None:

                self.to_file.write("old file mode %o\n" % old_mode)

            self.to_file.write("new file mode %o\n" % new_mode) 

        else:

            self.to_file.write("deleted file mode %o\n" % old_mode)

    def _get_rev(self, contents):

        if contents is None:

            return "0" * 7

        else:

            return Blob.from_string("".join(contents)).id[:7]

    def _write_contents_diff(self, old_path, old_mode, old_contents, new_path, new_mode, new_contents):

        if old_path is None:

            old_path = "/dev/null"

        else:

            old_path = "a/%s" % old_path

        if new_path is None:

            new_path = "/dev/null"

        else:

            new_path = "b/%s" % new_path

        self.to_file.write("diff --git %s %s\n" % (old_path, new_path))

        self._write_file_mode(old_mode, new_mode)

        old_rev = self._get_rev(old_contents)

        new_rev = self._get_rev(new_contents)

        self.to_file.write("index %s..%s %o\n" % (old_rev, new_rev, new_mode))

        _mod_diff.internal_diff(old_path, old_contents,

                                new_path, new_contents,

                                self.to_file)

    def _get_file_mode(self, tree, path, kind, executable):

        if path is None:

            return None

        return object_mode(kind, executable)

    def _show_diff(self, specific_files, extra_trees):

        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")

        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

            oldpath, newpath = paths

            oldpath_encoded = get_encoded_path(paths[0])

            newpath_encoded = get_encoded_path(paths[1])

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

            if old_present is not None:

                old_contents = self.old_tree.get_file(file_id).readlines()

            else:

                old_contents = None

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

            if new_present is not None:

                new_contents = self.new_tree.get_file(file_id).readlines()

            else:

                new_contents = None

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

            old_mode = self._get_file_mode(self.old_tree, oldpath_encoded, kind[0], executable[0])

            new_mode = self._get_file_mode(self.new_tree, newpath_encoded, kind[1], executable[1])

            self._write_contents_diff(oldpath_encoded, old_mode, old_contents, 

                                      newpath_encoded, new_mode, new_contents)

            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)]

        s.write("From %s %s\n" % (commit.id, time.ctime(commit.commit_time)))

        s.write("From: %s\n" % commit.author)

        s.write("Date: %s\n" % time.strftime("%a, %d %b %Y %H:%M:%S %Z"))

        s.write("Subject: [PATCH %d/%d] %s\n" % (num, total, commit.message))

        s.write("\n")

        s.write("---\n")

        s.write("TODO: Print diffstat\n")

        s.write("\n")

        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)

        differ = GitDiffTree.from_trees_options(tree_1, tree_2, s, 'utf8', None,

            'a/', 'b/', None)

        differ.show_diff(None, None)

        s.write("-- \n")

        s.write("bzr %s, bzr-git %d.%d.%d\n" % ((bzrlib.__version__, ) + bzr_git_version_info[:3]))

        summary = "%04d-%s" % (num, commit.message.splitlines()[0].replace(" ", "-"))

        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)