mercurial/manifest.py

44662:25d97090c6ca

        if not ret._isempty():
            ret._dirty = True
        return ret

    def diff(self, m2, match=None, clean=False):
        '''Finds changes between the current manifest and m2.

        Args:
          m2: the manifest to which this manifest should be compared.

# and upper bound of what we expect from compression
# (real live value seems to be "3")
MAXCOMPRESSION = 3


@interfaceutil.implementer(repository.imanifeststorage)
class manifestrevlog(object):
    '''A revlog that stores manifest texts. This is responsible for caching the
    full-text manifest contents.
    '''

        added,
        removed,
        readtree=None,
        match=None,
    ):
        if p1 in self.fulltextcache and util.safehasattr(m, b'fastdelta'):
            # If our first parent is in the manifest cache, we can
            # compute a delta here using properties we know about the
            # manifest up-front, which may save time later for the
            # revlog layer.

            cachedelta = self._revlog.rev(p1), deltatext
            text = util.buffer(arraytext)
            n = self._revlog.addrevision(
                text, transaction, link, p1, p2, cachedelta
            )
        else:
            # The first parent manifest isn't already loaded, so we'll
            # just encode a fulltext of the manifest and pass that
            # through to the revlog layer, and let it handle the delta
            # process.
            if self._treeondisk:
                assert readtree, b"readtree must be set for treemanifest writes"
                assert match, b"match must be specified for treemanifest writes"
                m1 = readtree(self.tree, p1)
                m2 = readtree(self.tree, p2)

44663:948fac24bc39

        if not ret._isempty():
            ret._dirty = True
        return ret

    def fastdelta(self, base, changes):
        raise FastdeltaUnavailable()

    def diff(self, m2, match=None, clean=False):
        '''Finds changes between the current manifest and m2.

        Args:
          m2: the manifest to which this manifest should be compared.

# and upper bound of what we expect from compression
# (real live value seems to be "3")
MAXCOMPRESSION = 3


class FastdeltaUnavailable(Exception):
    """Exception raised when fastdelta isn't usable on a manifest."""


@interfaceutil.implementer(repository.imanifeststorage)
class manifestrevlog(object):
    '''A revlog that stores manifest texts. This is responsible for caching the
    full-text manifest contents.
    '''

        added,
        removed,
        readtree=None,
        match=None,
    ):
        try:
            if p1 not in self.fulltextcache:
                raise FastdeltaUnavailable()
            # If our first parent is in the manifest cache, we can
            # compute a delta here using properties we know about the
            # manifest up-front, which may save time later for the
            # revlog layer.

            cachedelta = self._revlog.rev(p1), deltatext
            text = util.buffer(arraytext)
            n = self._revlog.addrevision(
                text, transaction, link, p1, p2, cachedelta
            )
        except FastdeltaUnavailable:
            # The first parent manifest isn't already loaded or the
            # manifest implementation doesn't support fastdelta, so
            # we'll just encode a fulltext of the manifest and pass
            # that through to the revlog layer, and let it handle the
            # delta process.
            if self._treeondisk:
                assert readtree, b"readtree must be set for treemanifest writes"
                assert match, b"match must be specified for treemanifest writes"
                m1 = readtree(self.tree, p1)
                m2 = readtree(self.tree, p2)