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Viewing changes to bzrlib/transport/readonly.py

  • Committer: abentley
  • Date: 2006-04-20 23:47:53 UTC
  • mfrom: (1681 +trunk)
  • mto: This revision was merged to the branch mainline in revision 1683.
  • Revision ID: abentley@lappy-20060420234753-6a6874b76f09f86d
Merge bzr.dev

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bzrlib/transport/readonly.py
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"""Implementation of Transport that adapts another transport to be readonly."""
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from bzrlib.errors import TransportNotPossible
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from bzrlib.transport import get_transport, Transport, Server
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class ReadonlyTransportDecorator(Transport):
 
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from bzrlib.transport.decorator import TransportDecorator, DecoratorServer
 
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class ReadonlyTransportDecorator(TransportDecorator):
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    """A decorator that can convert any transport to be readonly.
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    This does not use __getattr__ hacks as we need to ensure that
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    new writable methods are overridden correctly.
 
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    This is requested via the 'readonly+' prefix to get_transport().
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    """
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    def __init__(self, url, _decorated=None):
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        """Set the 'base' path where files will be stored.
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        _decorated is a private parameter for cloning."""
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        assert url.startswith('readonly+')
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        decorated_url = url[len('readonly+'):]
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        if _decorated is None:
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            self._decorated = get_transport(decorated_url)
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        else:
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            self._decorated = _decorated
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        super(ReadonlyTransportDecorator, self).__init__(
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            "readonly+" + self._decorated.base)
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    def clone(self, offset=None):
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        """See Transport.clone()."""
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        decorated_clone = self._decorated.clone(offset)
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        return ReadonlyTransportDecorator("readonly+" + decorated_clone.base,
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                                          decorated_clone)
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    def abspath(self, relpath):
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        """See Transport.abspath()."""
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        return "readonly+" + self._decorated.abspath(relpath)
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    def append(self, relpath, f):
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        """See Transport.append()."""
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        raise TransportNotPossible('readonly transport')
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    def has(self, relpath):
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        """See Transport.has()."""
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        return self._decorated.has(relpath)
 
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    @classmethod
 
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    def _get_url_prefix(self):
 
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        """Readonly transport decorators are invoked via 'readonly+'"""
 
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        return 'readonly+'
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    def delete(self, relpath):
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        """See Transport.delete()."""
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        """See Transport.delete_tree()."""
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        raise TransportNotPossible('readonly transport')
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    def get(self, relpath):
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        """See Transport.get()."""
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        return self._decorated.get(relpath)
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    def put(self, relpath, f, mode=None):
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        """See Transport.put()."""
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        raise TransportNotPossible('readonly transport')
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        """See Transport.is_readonly."""
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        return True
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    def listable(self):
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        """See Transport.listable."""
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        return self._decorated.listable()
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    def iter_files_recursive(self):
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        """See Transport.iter_files_recursive()."""
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        return self._decorated.iter_files_recursive()
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    def list_dir(self, relpath):
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        """See Transport.list_dir()."""
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        return self._decorated.list_dir(relpath)
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    def rmdir(self, relpath):
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        """See Transport.rmdir."""
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        raise TransportNotPossible('readonly transport')
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    def should_cache(self):
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        """See Transport.should_cache()."""
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        return self._decorated.should_cache()
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    def stat(self, relpath):
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        """See Transport.stat()."""
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        return self._decorated.stat(relpath)
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    def lock_read(self, relpath):
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        """See Transport.lock_read."""
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        return self._decorated.lock_read(relpath)
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    def lock_write(self, relpath):
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        """See Transport.lock_write."""
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        raise TransportNotPossible('readonly transport')
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class ReadonlyServer(Server):
 
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class ReadonlyServer(DecoratorServer):
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    """Server for the ReadonlyTransportDecorator for testing with."""
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    def setUp(self, server=None):
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        """See bzrlib.transport.Server.setUp.
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        :server: decorate the urls given by server. If not provided a
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        LocalServer is created.
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        """
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        if server is not None:
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            self._made_server = False
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            self._server = server
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        else:
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            from bzrlib.transport.local import LocalRelpathServer
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            self._made_server = True
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            self._server = LocalRelpathServer()
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            self._server.setUp()
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    def tearDown(self):
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        """See bzrlib.transport.Server.tearDown."""
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        if self._made_server:
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            self._server.tearDown()
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    def get_bogus_url(self):
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        """See bzrlib.transport.Server.get_bogus_url."""
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        return "readonly+" + self._server.get_bogus_url()
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    def get_url(self):
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        """See bzrlib.transport.Server.get_url."""
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        return "readonly+" + self._server.get_url()
 
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    def get_decorator_class(self):
 
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        return ReadonlyTransportDecorator
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def get_test_permutations():