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More performance hacking, introduce sqlite cache, escape characters in commits that break serializers.

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git_dir.py
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"""An adapter between a Git control dir and a Bazaar BzrDir"""
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import os
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import bzrlib
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from bzrlib.lazy_import import lazy_import
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from bzrlib import (
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    bzrdir,
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    )
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lazy_import(globals(), """
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from bzrlib.lockable_files import TransportLock
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from bzrlib.plugins.git import (
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    errors,
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    branch,
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    repository,
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    workingtree,
 
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    git_branch,
 
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    git_repository,
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    )
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""")
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from bzrlib.plugins.git import LocalGitBzrDirFormat
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class GitLock(object):
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    """A lock that thunks through to Git."""
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    def lock_write(self, token=None):
 
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    def lock_write(self):
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        pass
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    def lock_read(self):
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    def unlock(self):
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        pass
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    def peek(self):
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        pass
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    def validate_token(self, token):
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        pass
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class GitLockableFiles(lockable_files.LockableFiles):
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    """Git specific lockable files abstraction."""
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    def __init__(self, transport, lock):
 
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    def __init__(self, lock):
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        self._lock = lock
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        self._transaction = None
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        self._lock_mode = None
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        self._lock_count = 0
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        self._transport = transport
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class GitDir(bzrdir.BzrDir):
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    """An adapter to the '.git' dir used by git."""
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    def is_supported(self):
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        return True
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    def cloning_metadir(self, stacked=False):
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        return bzrlib.bzrdir.format_registry.make_bzrdir("1.9-rich-root")
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class LocalGitDir(GitDir):
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    """An adapter to the '.git' dir used by git."""
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    _gitrepository_class = repository.LocalGitRepository
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    def __init__(self, transport, lockfiles, gitrepo, format):
 
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    def __init__(self, transport, lockfiles, format):
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        self._format = format
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        self.root_transport = transport
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        self._git = gitrepo
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        if gitrepo.bare:
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            self.transport = transport
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        else:
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            self.transport = transport.clone('.git')
 
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        self.transport = transport.clone('.git')
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        self._lockfiles = lockfiles
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    def get_branch_transport(self, branch_format):
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        if branch_format is None:
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            return self.transport
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        if isinstance(branch_format, LocalGitBzrDirFormat):
 
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        if isinstance(branch_format, GitBzrDirFormat):
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            return self.transport
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        raise errors.bzr_errors.IncompatibleFormat(branch_format, self._format)
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    get_repository_transport = get_branch_transport
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    get_workingtree_transport = get_branch_transport
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    def is_supported(self):
 
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        return True
 
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    def open_branch(self, ignored=None):
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        """'create' a branch for this dir."""
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        repo = self.open_repository()
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        return branch.LocalGitBranch(self, repo, "HEAD", repo._git.head(), self._lockfiles)
 
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        """'crate' a branch for this dir."""
 
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        return git_branch.GitBranch(self, self._lockfiles)
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    def open_repository(self, shared=False):
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        """'open' a repository for this dir."""
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        return self._gitrepository_class(self, self._lockfiles)
 
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        return git_repository.GitRepository(self, self._lockfiles)
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    def open_workingtree(self, recommend_upgrade=True):
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        if (not self._git.bare and 
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            os.path.exists(os.path.join(self._git.controldir(), "index"))):
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            return workingtree.GitWorkingTree(self, self.open_repository(), 
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                                                  self.open_branch())
 
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    def open_workingtree(self):
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        loc = urlutils.unescape_for_display(self.root_transport.base, 'ascii')
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        raise errors.bzr_errors.NoWorkingTree(loc)
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    def create_repository(self, shared=False):
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        return self.open_repository()
 
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class GitBzrDirFormat(bzrdir.BzrDirFormat):
 
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    """The .git directory control format."""
 
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    @classmethod
 
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    def _known_formats(self):
 
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        return set([GitBzrDirFormat()])
 
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    def open(self, transport, _create=False, _found=None):
 
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        """Open this directory.
 
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        :param _create: create the git dir on the fly. private to GitDirFormat.
 
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        """
 
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        # we dont grok readonly - git isn't integrated with transport.
 
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        url = transport.base
 
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        if url.startswith('readonly+'):
 
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            url = url[len('readonly+'):]
 
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        path = urlutils.local_path_from_url(url)
 
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        if not transport.has('.git'):
 
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            raise errors.bzr_errors.NotBranchError(path=transport.base)
 
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        lockfiles = GitLockableFiles(GitLock())
 
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        return GitDir(transport, lockfiles, self)
 
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    @classmethod
 
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    def probe_transport(klass, transport):
 
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        """Our format is present if the transport ends in '.not/'."""
 
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        # little ugly, but works
 
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        format = klass()
 
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        # delegate to the main opening code. This pays a double rtt cost at the
 
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        # moment, so perhaps we want probe_transport to return the opened thing
 
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        # rather than an openener ? or we could return a curried thing with the
 
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        # dir to open already instantiated ? Needs more thought.
 
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        try:
 
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            format.open(transport)
 
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            return format
 
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        except Exception, e:
 
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            raise errors.bzr_errors.NotBranchError(path=transport.base)
 
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        raise errors.bzr_errors.NotBranchError(path=transport.base)
 
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bzrdir.BzrDirFormat.register_control_format(GitBzrDirFormat)