4286     if node:

  4286     if node:

  4287         node = scmutil.revsingle(repo, node).node()

  4287         node = scmutil.revsingle(repo, node).node()

  4288 

  4288 

  4289     if not node and repo._bookmarkcurrent:

  4289     if not node and repo._bookmarkcurrent:

  4290         bmheads = repo.bookmarkheads(repo._bookmarkcurrent)

  4290         bmheads = repo.bookmarkheads(repo._bookmarkcurrent)

  4292         if len(bmheads) == 2:

  4292         if len(bmheads) == 2:

  4293             if curhead == bmheads[0]:

  4293             if curhead == bmheads[0]:

  4294                 node = bmheads[1]

  4294                 node = bmheads[1]

  4295             else:

  4295             else:

  4296                 node = bmheads[0]

  4296                 node = bmheads[0]