mercurial/context.py

23978:eeb5d5ab14a6

# Phony node value to stand-in for new files in some uses of
# manifests. Manifests support 21-byte hashes for nodes which are
# dirty in the working copy.
_newnode = '!' * 21

def _adjustlinkrev(repo, path, filelog, fnode, srcrev, inclusive=False):
    """return the first ancestor of <srcrev> introducting <fnode>

    If the linkrev of the file revision does not point to an ancestor of
    srcrev, we'll walk down the ancestors until we find one introducing this
    file revision.

    :repo: a localrepository object (used to access changelog and manifest)
    :path: the file path
    :fnode: the nodeid of the file revision
    :filelog: the filelog of this path
    :srcrev: the changeset revision we search ancestors from
    :inclusive: if true, the src revision will also be checked
    """
    cl = repo.unfiltered().changelog
    ma = repo.manifest
    # fetch the linkrev
    fr = filelog.rev(fnode)
    lkr = filelog.linkrev(fr)
    # check if this linkrev is an ancestor of srcrev
    anc = cl.ancestors([srcrev], lkr, inclusive=inclusive)
    if lkr not in anc:
        for a in anc:
            ac = cl.read(a) # get changeset data (we avoid object creation).
            if path in ac[3]: # checking the 'files' field.
                # The file has been touched, check if the content is similar
                # to the one we search for.
                if fnode == ma.readfast(ac[0]).get(path):
                    return a
        # In theory, we should never get out of that loop without a result. But
        # if manifest uses a buggy file revision (not children of the one it
        # replaces) we could. Such a buggy situation will likely result is crash
        # somewhere else at to some point.
    return lkr

class basectx(object):
    """A basectx object represents the common logic for its children:
    changectx: read-only context that is already present in the repo,
    workingctx: a context that represents the working directory and can

            or self.size() == fctx.size()):
            return self._filelog.cmp(self._filenode, fctx.data())

        return True

    def introrev(self):
        """return the rev of the changeset which introduced this file revision

        This method is different from linkrev because it take into account the
        changeset the filectx was created from. It ensures the returned

        lkr = self.linkrev()
        attrs = vars(self)
        noctx = not ('_changeid' in attrs or '_changectx' in attrs)
        if noctx or self.rev() == lkr:
            return self.linkrev()
        return _adjustlinkrev(self._repo, self._path, self._filelog,
                              self._filenode, self.rev(), inclusive=True)

    def parents(self):
        _path = self._path
        fl = self._filelog
        parents = self._filelog.parents(self._filenode)

        for path, fnode, l in pl:
            if '_changeid' in vars(self) or '_changectx' in vars(self):
                # If self is associated with a changeset (probably explicitly
                # fed), ensure the created filectx is associated with a
                # changeset that is an ancestor of self.changectx.
                rev = _adjustlinkrev(self._repo, path, l, fnode, self.rev())
                fctx = filectx(self._repo, path, fileid=fnode, filelog=l,
                               changeid=rev)
            else:
                fctx = filectx(self._repo, path, fileid=fnode, filelog=l)
            ret.append(fctx)

23979:087603b50889

# Phony node value to stand-in for new files in some uses of
# manifests. Manifests support 21-byte hashes for nodes which are
# dirty in the working copy.
_newnode = '!' * 21

class basectx(object):
    """A basectx object represents the common logic for its children:
    changectx: read-only context that is already present in the repo,
    workingctx: a context that represents the working directory and can

            or self.size() == fctx.size()):
            return self._filelog.cmp(self._filenode, fctx.data())

        return True

    def _adjustlinkrev(self, path, filelog, fnode, srcrev, inclusive=False):
        """return the first ancestor of <srcrev> introducting <fnode>

        If the linkrev of the file revision does not point to an ancestor of
        srcrev, we'll walk down the ancestors until we find one introducing
        this file revision.

        :repo: a localrepository object (used to access changelog and manifest)
        :path: the file path
        :fnode: the nodeid of the file revision
        :filelog: the filelog of this path
        :srcrev: the changeset revision we search ancestors from
        :inclusive: if true, the src revision will also be checked
        """
        repo = self._repo
        cl = repo.unfiltered().changelog
        ma = repo.manifest
        # fetch the linkrev
        fr = filelog.rev(fnode)
        lkr = filelog.linkrev(fr)
        # check if this linkrev is an ancestor of srcrev
        anc = cl.ancestors([srcrev], lkr, inclusive=inclusive)
        if lkr not in anc:
            for a in anc:
                ac = cl.read(a) # get changeset data (we avoid object creation)
                if path in ac[3]: # checking the 'files' field.
                    # The file has been touched, check if the content is
                    # similar to the one we search for.
                    if fnode == ma.readfast(ac[0]).get(path):
                        return a
            # In theory, we should never get out of that loop without a result.
            # But if manifest uses a buggy file revision (not children of the
            # one it replaces) we could. Such a buggy situation will likely
            # result is crash somewhere else at to some point.
        return lkr

    def introrev(self):
        """return the rev of the changeset which introduced this file revision

        This method is different from linkrev because it take into account the
        changeset the filectx was created from. It ensures the returned

        lkr = self.linkrev()
        attrs = vars(self)
        noctx = not ('_changeid' in attrs or '_changectx' in attrs)
        if noctx or self.rev() == lkr:
            return self.linkrev()
        return self._adjustlinkrev(self._path, self._filelog, self._filenode,
                                   self.rev(), inclusive=True)

    def parents(self):
        _path = self._path
        fl = self._filelog
        parents = self._filelog.parents(self._filenode)

        for path, fnode, l in pl:
            if '_changeid' in vars(self) or '_changectx' in vars(self):
                # If self is associated with a changeset (probably explicitly
                # fed), ensure the created filectx is associated with a
                # changeset that is an ancestor of self.changectx.
                rev = self._adjustlinkrev(path, l, fnode, self.rev())
                fctx = filectx(self._repo, path, fileid=fnode, filelog=l,
                               changeid=rev)
            else:
                fctx = filectx(self._repo, path, fileid=fnode, filelog=l)
            ret.append(fctx)