/brz/remove-bazaar

# Copyright (C) 2009-2018 Jelmer Vernooij <jelmer@jelmer.uk>

# 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

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

import time

from .. import __version__ as brz_version

from .. import (

    branch as _mod_branch,

    diff as _mod_diff,

    errors,

    osutils,

    revision as _mod_revision,

    )

from ..merge_directive import BaseMergeDirective

from .mapping import (

    object_mode,

    )

from .object_store import (

    get_object_store,

    )

from io import BytesIO

from dulwich import (

    __version__ as dulwich_version,

    )

from dulwich.objects import (

    Blob,

    )

version_tail = "Breezy %s, dulwich %d.%d.%d" % (

    (brz_version, ) + 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 0

            return object_mode(kind, executable)

        def get_blob(present, tree, path):

            if present:

                with tree.get_file(path) as f:

                    return Blob.from_string(f.read())

            else:

                return None

        trees = (self.old_tree, self.new_tree)

        for change 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 change.parent_id == (None, None) or change.kind == (None, None):

                continue

            path_encoded = (get_encoded_path(change.path[0]),

                            get_encoded_path(change.path[1]))

            present = ((change.kind[0] not in (None, 'directory')),

                       (change.kind[1] not in (None, 'directory')))

            if not present[0] and not present[1]:

                continue

            contents = (get_blob(present[0], trees[0], change.path[0]),

                        get_blob(present[1], trees[1], change.path[1]))

            renamed = (change.parent_id[0], change.name[0]) != (change.parent_id[1], change.name[1])

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

                                  change.kind[0], change.executable[0]),

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

                                  change.kind[1], change.executable[1]))

            write_blob_diff(self.to_file,

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

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

            has_changes |= (change.changed_content or renamed)

        return has_changes

def generate_patch_filename(num, summary):

    return "%04d-%s.patch" % (num, summary.replace("/", "_").rstrip("."))

class GitMergeDirective(BaseMergeDirective):

    multiple_output_files = True

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

                 target_branch, source_branch=None, message=None,

                 patches=None, local_target_branch=None):

        super(GitMergeDirective, self).__init__(

            revision_id=revision_id, testament_sha1=testament_sha1, time=time,

            timezone=timezone, target_branch=target_branch, patch=None,

            source_branch=source_branch, message=message, bundle=None)

        self.patches = patches

    def to_lines(self):

        return self.patch.splitlines(True)

    def to_files(self):

        return ((summary, patch.splitlines(True)) for (summary, patch) in self.patches)

    @classmethod

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

                         context=_mod_diff.DEFAULT_CONTEXT_AMOUNT):

        s = BytesIO()

        store = get_object_store(repository)

        with store.lock_read():

            commit = store[repository.lookup_bzr_revision_id(revision_id)[0]]

        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 = BytesIO()

        differ = GitDiffTree.from_trees_options(

            tree_1, tree_2, contents, 'utf8', None, 'a/', 'b/', None,

            context_lines=context)

        differ.show_diff(None, None)

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

                           version_tail)

        summary = generate_patch_filename(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)

        with submit_branch.lock_read():

            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))

        return cls(revision_id, None, time, timezone,

                   target_branch=target_branch, source_branch=public_branch,

                   message=message, patches=patches)

def send_git(branch, revision_id, submit_branch, public_branch, no_patch,

             no_bundle, message, base_revision_id, local_target_branch=None):

    if no_patch:

        raise errors.CommandError(

            "no patch not supported for git-am style patches")

    if no_bundle:

        raise errors.CommandError(

            "no bundle not supported for git-am style patches")

    return GitMergeDirective.from_objects(

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

        osutils.local_time_offset(), submit_branch,

        public_branch=public_branch, message=message,

        local_target_branch=local_target_branch)