/brz/remove-bazaar

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https://launchpad.net/bugs/323972
mention the requirement to install Dulwich.

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server.py
 
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# Copyright (C) 2008 Canonical Ltd
 
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#
 
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# This program is free software; you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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#
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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from bzrlib.bzrdir import BzrDir
 
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from bzrlib.repository import Repository
 
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from bzrlib.inventory import InventoryDirectory, InventoryFile
 
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from bzrlib.osutils import splitpath
 
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from bzrlib.plugins.git.fetch import import_git_objects
 
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from bzrlib.plugins.git.mapping import default_mapping, revision_to_commit, inventory_to_tree_and_blobs
 
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from dulwich.server import Backend
 
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from dulwich.pack import Pack, PackData, write_pack_index_v2
 
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from dulwich.objects import ShaFile, Commit, Tree, Blob
 
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import os, tempfile
 
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import stat
 
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S_IFGITLINK = 0160000
 
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#S_IFREG | 0664 # *Might* see this; would fail fsck --strict
 
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class BzrBackend(Backend):
 
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    def __init__(self, directory):
 
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        self.directory = directory
 
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        self.mapping = default_mapping
 
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    def get_refs(self):
 
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        """ return a dict of all tags and branches in repository (and shas) """
 
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        ret = {}
 
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        repo_dir = BzrDir.open(self.directory)
 
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        repo = repo_dir.open_repository()
 
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        branch = None
 
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        for branch in repo.find_branches(using=True):
 
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            #FIXME: Look for 'master' or 'trunk' in here, and set HEAD accordingly...
 
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            #FIXME: Need to get branch path relative to its repository and use this instead of nick
 
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            ret["refs/heads/"+branch.nick] = self.mapping.revision_id_bzr_to_foreign(branch.last_revision())[0]
 
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        if 'HEAD' not in ret and branch:
 
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            ret['HEAD'] = self.mapping.revision_id_bzr_to_foreign(branch.last_revision())[0]
 
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        return ret
 
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    def apply_pack(self, refs, read):
 
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        """ apply pack from client to current repository """
 
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        fd, path = tempfile.mkstemp(suffix=".pack")
 
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        f = os.fdopen(fd, 'w')
 
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        f.write(read())
 
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        f.close()
 
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        p = PackData(path)
 
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        entries = p.sorted_entries()
 
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        write_pack_index_v2(path[:-5]+".idx", entries, p.calculate_checksum())
 
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        def get_objects():
 
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            pack = Pack(path[:-5])
 
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            for obj in pack.iterobjects():
 
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                yield obj
 
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        target = Repository.open(self.directory)
 
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        target.lock_write()
 
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        try:
 
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            target.start_write_group()
 
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            try:
 
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                import_git_objects(target, self.mapping, iter(get_objects()))
 
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            finally:
 
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                target.commit_write_group()
 
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        finally:
 
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            target.unlock()
 
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        for oldsha, sha, ref in refs:
 
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            if ref[:11] == 'refs/heads/':
 
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                branch_nick = ref[11:]
 
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                try:
 
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                    target_dir = BzrDir.open(self.directory + "/" + branch_nick)
 
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                except:
 
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                    target_dir = BzrDir.create(self.directory + "/" + branch_nick)
 
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                try:
 
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                    target_branch = target_dir.open_branch()
 
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                except:
 
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                    target_branch = target_dir.create_branch()
 
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                rev_id = self.mapping.revision_id_foreign_to_bzr(sha)
 
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                target_branch.generate_revision_history(rev_id)
 
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    def fetch_objects(self, determine_wants, graph_walker, progress):
 
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        """ yield git objects to send to client """
 
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        repo = Repository.open(self.directory)
 
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        # If this is a Git repository, just use the existing fetch_objects implementation.
 
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        if getattr(repo, "fetch_objects", None) is None:
 
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            return repo.fetch_objects(determine_wants, graph_walker, progress)
 
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        wants = determine_wants(self.get_refs())
 
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        commits_to_send = set([self.mapping.revision_id_foreign_to_bzr(w) for w in wants])
 
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        rev_done = set()
 
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        obj_sent = set()
 
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        objects = set()
 
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        repo.lock_read()
 
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        try:
 
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            have = graph_walker.next()
 
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            while have:
 
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                rev_done.add(have)
 
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                if repo.has_revision(self.mapping.revision_id_foreign_to_bzr(sha)):
 
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                    graph_walker.ack(have)
 
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                have = graph_walker.next()
 
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            while commits_to_send:
 
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                commit = commits_to_send.pop()
 
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                if commit in rev_done:
 
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                    continue
 
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                rev_done.add(commit)
 
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                rev = repo.get_revision(commit)
 
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                commits_to_send.update([p for p in rev.parent_ids if not p in rev_done])
 
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                for sha, obj, path in inventory_to_tree_and_blobs(repo, self.mapping, commit):
 
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                    if sha not in obj_sent:
 
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                        obj_sent.add(sha)
 
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                        objects.add((obj, path))
 
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                objects.add((revision_to_commit(rev, sha, self.mapping.revision_id_bzr_to_foreign), None))
 
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        finally:
 
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            repo.unlock()
 
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        return (len(objects), iter(objects))
 
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