comparison mercurial/localrepo.py @ 47421:d2e0226b511a

transaction: narrow the error filtering when failing to rename undo file

Having inconsistent "undo" files can be quite serious so we narrow the error
filtering to the intent that the comment explain.

(This is an opportunity improvement while looking at something next to that.)

Differential Revision: https://phab.mercurial-scm.org/D10845

47420:e7ad2490d623

            # leaving both src and dest on disk. delete dest to make sure
            # the rename couldn't be such a no-op.
            vfs.tryunlink(dest)
            try:
                vfs.rename(src, dest)
            except OSError:  # journal file does not yet exist
                pass

    return a


def undoname(fn):

47421:d2e0226b511a

            # leaving both src and dest on disk. delete dest to make sure
            # the rename couldn't be such a no-op.
            vfs.tryunlink(dest)
            try:
                vfs.rename(src, dest)
            except OSError as exc:  # journal file does not yet exist
                if exc.errno != errno.ENOENT:
                    raise

    return a


def undoname(fn):