/brz/remove-bazaar

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

#

# 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 for committing in native Git working trees."""

from __future__ import absolute_import

from dulwich.index import (

    commit_tree,

    )

import stat

from .. import (

    config as _mod_config,

    gpg,

    osutils,

    revision as _mod_revision,

    )

from ..errors import (

    BzrError,

    RootMissing,

    UnsupportedOperation,

    )

from ..repository import (

    CommitBuilder,

    )

from ..sixish import (

    viewitems,

    )

from dulwich.objects import (

    Blob,

    Commit,

    )

from dulwich.index import read_submodule_head

from .mapping import (

    object_mode,

    fix_person_identifier,

    )

from .tree import entry_factory

class SettingCustomFileIdsUnsupported(UnsupportedOperation):

    _fmt = ("Unable to store addition of file with custom file ids: "

            "%(file_ids)r")

    def __init__(self, file_ids):

        BzrError.__init__(self)

        self.file_ids = file_ids

class GitCommitBuilder(CommitBuilder):

    """Commit builder for Git repositories."""

    supports_record_entry_contents = False

    def __init__(self, *args, **kwargs):

        super(GitCommitBuilder, self).__init__(*args, **kwargs)

        self.random_revid = True

        self._validate_revprops(self._revprops)

        self.store = self.repository._git.object_store

        self._blobs = {}

        self._inv_delta = []

        self._any_changes = False

        self._override_fileids = {}

        self._mapping = self.repository.get_mapping()

    def any_changes(self):

        return self._any_changes

    def record_iter_changes(self, workingtree, basis_revid, iter_changes):

        seen_root = False

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

             executable) in iter_changes:

            if kind[1] in ("directory",):

                self._inv_delta.append(

                    (path[0], path[1], file_id, entry_factory[kind[1]](

                        file_id, name[1], parent[1])))

                if kind[0] in ("file", "symlink"):

                    self._blobs[path[0].encode("utf-8")] = None

                    self._any_changes = True

                if path[1] == "":

                    seen_root = True

                continue

            self._any_changes = True

            if path[1] is None:

                self._inv_delta.append((path[0], path[1], file_id, None))

                self._blobs[path[0].encode("utf-8")] = None

                continue

            try:

                entry_kls = entry_factory[kind[1]]

            except KeyError:

                raise KeyError("unknown kind %s" % kind[1])

            entry = entry_kls(file_id, name[1], parent[1])

            if kind[1] == "file":

                entry.executable = executable[1]

                blob = Blob()

                f, st = workingtree.get_file_with_stat(path[1])

                try:

                    blob.data = f.read()

                finally:

                    f.close()

                entry.text_size = len(blob.data)

                entry.text_sha1 = osutils.sha_string(blob.data)

                self.store.add_object(blob)

                sha = blob.id

            elif kind[1] == "symlink":

                symlink_target = workingtree.get_symlink_target(path[1])

                blob = Blob()

                blob.data = symlink_target.encode("utf-8")

                self.store.add_object(blob)

                sha = blob.id

                entry.symlink_target = symlink_target

                st = None

            elif kind[1] == "tree-reference":

                sha = read_submodule_head(workingtree.abspath(path[1]))

                reference_revision = workingtree.get_reference_revision(path[1])

                entry.reference_revision = reference_revision

                st = None

            else:

                raise AssertionError("Unknown kind %r" % kind[1])

            mode = object_mode(kind[1], executable[1])

            self._inv_delta.append((path[0], path[1], file_id, entry))

            encoded_new_path = path[1].encode("utf-8")

            self._blobs[encoded_new_path] = (mode, sha)

            if st is not None:

                yield file_id, path[1], (entry.text_sha1, st)

            if self._mapping.generate_file_id(encoded_new_path) != file_id:

                self._override_fileids[encoded_new_path] = file_id

            else:

                self._override_fileids[encoded_new_path] = None

        if not seen_root and len(self.parents) == 0:

            raise RootMissing()

        if getattr(workingtree, "basis_tree", False):

            basis_tree = workingtree.basis_tree()

        else:

            if len(self.parents) == 0:

                basis_revid = _mod_revision.NULL_REVISION

            else:

                basis_revid = self.parents[0]

            basis_tree = self.repository.revision_tree(basis_revid)

        # Fill in entries that were not changed

        for entry in basis_tree._iter_tree_contents(include_trees=False):

            if entry.path in self._blobs:

                continue

            self._blobs[entry.path] = (entry.mode, entry.sha)

        if not self._lossy:

            try:

                fileid_map = dict(basis_tree._fileid_map.file_ids)

            except AttributeError:

                fileid_map = {}

            for path, file_id in viewitems(self._override_fileids):

                if not isinstance(path, bytes):

                    raise TypeError(path)

                if file_id is None:

                    if path in fileid_map:

                        del fileid_map[path]

                else:

                    if not isinstance(file_id, bytes):

                        raise TypeError(file_id)

                    fileid_map[path] = file_id

            if fileid_map:

                fileid_blob = self._mapping.export_fileid_map(fileid_map)

            else:

                fileid_blob = None

            if fileid_blob is not None:

                if self._mapping.BZR_FILE_IDS_FILE is None:

                    raise SettingCustomFileIdsUnsupported(fileid_map)

                self.store.add_object(fileid_blob)

                self._blobs[self._mapping.BZR_FILE_IDS_FILE] = (

                    stat.S_IFREG | 0o644, fileid_blob.id)

            else:

                self._blobs[self._mapping.BZR_FILE_IDS_FILE] = None

        self.new_inventory = None

    def update_basis(self, tree):

        # Nothing to do here

        pass

    def finish_inventory(self):

        # eliminate blobs that were removed

        self._blobs = {k: v for (k, v) in viewitems(

            self._blobs) if v is not None}

    def _iterblobs(self):

        return ((path, sha, mode) for (path, (mode, sha))

                in viewitems(self._blobs))

    def commit(self, message):

        self._validate_unicode_text(message, 'commit message')

        c = Commit()

        c.parents = [self.repository.lookup_bzr_revision_id(

            revid)[0] for revid in self.parents]

        c.tree = commit_tree(self.store, self._iterblobs())

        encoding = self._revprops.pop(u'git-explicit-encoding', 'utf-8')

        c.encoding = encoding.encode('ascii')

        c.committer = fix_person_identifier(self._committer.encode(encoding))

        try:

            author = self._revprops.pop('author')

        except KeyError:

            try:

                authors = self._revprops.pop('authors').splitlines()

            except KeyError:

                author = self._committer

            else:

                if len(authors) > 1:

                    raise Exception("Unable to convert multiple authors")

                elif len(authors) == 0:

                    author = self._committer

                else:

                    author = authors[0]

        c.author = fix_person_identifier(author.encode(encoding))

        if self._revprops:

            raise NotImplementedError(self._revprops)

        c.commit_time = int(self._timestamp)

        c.author_time = int(self._timestamp)

        c.commit_timezone = self._timezone

        c.author_timezone = self._timezone

        c.message = message.encode(encoding)

        if (self._config_stack.get('create_signatures') ==

                _mod_config.SIGN_ALWAYS):

            strategy = gpg.GPGStrategy(self._config_stack)

            c.gpgsig = strategy.sign(c.as_raw_string(), gpg.MODE_DETACH)

        self.store.add_object(c)

        self.repository.commit_write_group()

        self._new_revision_id = self._mapping.revision_id_foreign_to_bzr(c.id)

        return self._new_revision_id

    def abort(self):

        if self.repository.is_in_write_group():

            self.repository.abort_write_group()

    def revision_tree(self):

        return self.repository.revision_tree(self._new_revision_id)

    def get_basis_delta(self):

        # TODO(jelmer): remove this logic when lp:~jelmer/brz/remaining lands

        for (oldpath, newpath, file_id, entry) in self._inv_delta:

            if entry is not None:

                entry.revision = self._new_revision_id

        return self._inv_delta

    def update_basis_by_delta(self, revid, delta):

        pass