/brz/remove-bazaar

# Copyright (C) 2008 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

"""An adapter between a Git index and a Bazaar Working Tree"""

from cStringIO import (

    StringIO,

    )

import errno

from dulwich.objects import (

    Blob,

    )

import os

import stat

from bzrlib import (

    errors,

    ignores,

    lockable_files,

    lockdir,

    osutils,

    transport,

    tree,

    workingtree,

    )

from bzrlib.decorators import (

    needs_read_lock,

    )

from bzrlib.plugins.git.inventory import (

    GitIndexInventory,

    )

from bzrlib.plugins.git.tree import (

    changes_from_git_changes,

    tree_delta_from_git_changes,

    )

IGNORE_FILENAME = ".gitignore"

class GitWorkingTree(workingtree.WorkingTree):

    """A Git working tree."""

    def __init__(self, bzrdir, repo, branch, index):

        self.basedir = bzrdir.root_transport.local_abspath('.')

        self.bzrdir = bzrdir

        self.repository = repo

        self.mapping = self.repository.get_mapping()

        self._branch = branch

        self._transport = bzrdir.transport

        self.controldir = self.bzrdir.transport.local_abspath('bzr')

        try:

            os.makedirs(self.controldir)

            os.makedirs(os.path.join(self.controldir, 'lock'))

        except OSError:

            pass

        self._control_files = lockable_files.LockableFiles(

            transport.get_transport(self.controldir), 'lock', lockdir.LockDir)

        self._format = GitWorkingTreeFormat()

        self.index = index

        self.views = self._make_views()

        self._detect_case_handling()

    def extras(self):

        """Yield all unversioned files in this WorkingTree.

        """

        for (dirpath, dirnames, filenames) in os.walk(self.basedir):

            if self.bzrdir.is_control_filename(dirpath[len(self.basedir):].strip("/")):

                continue

            for filename in filenames:

                relpath = os.path.join(dirpath[len(self.basedir):].strip("/"), filename)

                if not relpath in self.index:

                    yield relpath

    def unlock(self):

        # non-implementation specific cleanup

        self._cleanup()

        # reverse order of locking.

        try:

            return self._control_files.unlock()

        finally:

            self.branch.unlock()

    def is_control_filename(self, path):

        return os.path.basename(path) == ".git"

    def _rewrite_index(self):

        self.index.clear()

        for path, entry in self._inventory.iter_entries():

            if entry.kind == "directory":

                # Git indexes don't contain directories

                continue

            if entry.kind == "file":

                blob = Blob()

                try:

                    file, stat_val = self.get_file_with_stat(entry.file_id, path)

                except (errors.NoSuchFile, IOError):

                    # TODO: Rather than come up with something here, use the old index

                    file = StringIO()

                    from posix import stat_result

                    stat_val = stat_result((stat.S_IFREG | 0644, 0, 0, 0, 0, 0, 0, 0, 0, 0))

                blob.set_raw_string(file.read())

            elif entry.kind == "symlink":

                blob = Blob()

                try:

                    stat_val = os.lstat(self.abspath(path))

                except (errors.NoSuchFile, OSError):

                    # TODO: Rather than come up with something here, use the 

                    # old index

                    from posix import stat_result

                    stat_val = stat_result((stat.S_IFLNK, 0, 0, 0, 0, 0, 0, 0, 0, 0))

                blob.set_raw_string(entry.symlink_target)

            else:

                raise AssertionError("unknown kind '%s'" % entry.kind)

            # Add object to the repository if it didn't exist yet

            if not blob.id in self.repository._git.object_store:

                self.repository._git.object_store.add_object(blob)

            # Add an entry to the index or update the existing entry

            flags = 0 # FIXME

            self.index[path.encode("utf-8")] = (stat_val.st_ctime, stat_val.st_mtime, stat_val.st_dev, stat_val.st_ino, stat_val.st_mode, stat_val.st_uid, stat_val.st_gid, stat_val.st_size, blob.id, flags)

    def flush(self):

        # TODO: Maybe this should only write on dirty ?

        if self._control_files._lock_mode != 'w':

            raise errors.NotWriteLocked(self)

        self._rewrite_index()           

        self.index.write()

        self._inventory_is_modified = False

    def get_ignore_list(self):

        ignoreset = getattr(self, '_ignoreset', None)

        if ignoreset is not None:

            return ignoreset

        ignore_globs = set()

        ignore_globs.update(ignores.get_runtime_ignores())

        ignore_globs.update(ignores.get_user_ignores())

        if self.has_filename(IGNORE_FILENAME):

            f = self.get_file_byname(IGNORE_FILENAME)

            try:

                ignore_globs.update(ignores.parse_ignore_file(f))

            finally:

                f.close()

        self._ignoreset = ignore_globs

        return ignore_globs

    def set_last_revision(self, revid):

        self._change_last_revision(revid)

    def _reset_data(self):

        self._inventory_is_modified = False

        try:

            head = self.repository._git.head()

        except KeyError, name:

            raise errors.NotBranchError("branch %s at %s" % (name, self.repository.base))

        basis_inv = self.repository.get_inventory(self.branch.lookup_foreign_revision_id(head))

        store = self.repository._git.object_store

        fileid_map = self.mapping.get_fileid_map(store.__getitem__,

            store[head].tree)

        result = GitIndexInventory(basis_inv, fileid_map, self.index, store)

        self._set_inventory(result, dirty=False)

    @needs_read_lock

    def get_file_sha1(self, file_id, path=None, stat_value=None):

        if not path:

            path = self._inventory.id2path(file_id)

        try:

            return osutils.sha_file_by_name(self.abspath(path).encode(osutils._fs_enc))

        except OSError, (num, msg):

            if num in (errno.EISDIR, errno.ENOENT):

                return None

            raise

    def revision_tree(self, revid):

        return self.repository.revision_tree(revid)

    @needs_read_lock

    def conflicts(self):

        # FIXME:

        return []

class GitWorkingTreeFormat(workingtree.WorkingTreeFormat):

    @property

    def _matchingbzrdir(self):

        from bzrlib.plugins.git import LocalGitBzrDirFormat

        return LocalGitBzrDirFormat()

    def get_format_description(self):

        return "Git Working Tree"

class InterIndexGitTree(tree.InterTree):

    """InterTree that works between a Git revision tree and an index."""

    def __init__(self, source, target):

        super(InterIndexGitTree, self).__init__(source, target)

        self._index = target.index

    @classmethod

    def is_compatible(cls, source, target):

        from bzrlib.plugins.git.repository import GitRevisionTree

        return (isinstance(source, GitRevisionTree) and 

                isinstance(target, GitWorkingTree))

    def compare(self, want_unchanged=False, specific_files=None,

                extra_trees=None, require_versioned=False, include_root=False,

                want_unversioned=False):

        changes = self._index.changes_from_tree(

            self.source._repository._git.object_store, self.source.tree, 

            want_unchanged=want_unchanged)

        source_fileid_map = self.source.mapping.get_fileid_map(

            self.source._repository._git.object_store.__getitem__,

            self.source.tree)

        if self.target.mapping.BZR_FILE_IDS_FILE is not None:

            try:

                file_id = self.target.path2id(

                    self.target.mapping.BZR_FILE_IDS_FILE)

            except errors.NoSuchId:

                target_fileid_map = {}

            else:

                target_fileid_map = self.import_fileid_map(Blob.from_string(self.target.file_text(file_id)))

        else:

            target_fileid_map = {}

        ret = tree_delta_from_git_changes(changes, self.target.mapping, 

            (source_fileid_map, target_fileid_map),

            specific_file=specific_files, require_versioned=require_versioned)

        if want_unversioned:

            for e in self.target.extras():

                ret.unversioned.append((e, None, osutils.file_kind(self.target.abspath(e))))

        return ret

    def iter_changes(self, include_unchanged=False, specific_files=None,

        pb=None, extra_trees=[], require_versioned=True, want_unversioned=False):

        changes = self._index.changes_from_tree(

            self.source._repository._git.object_store, self.source.tree, 

            want_unchanged=include_unchanged)

        # FIXME: Handle want_unversioned

        return changes_from_git_changes(changes, self.target.mapping, 

            specific_file=specific_files)

tree.InterTree.register_optimiser(InterIndexGitTree)