Re: Another VC terminology change?

[Dan Nicolaescu]

Stefan Monnier <address@hidden> writes:

  > >> Not about "checkout" which sometimes means "update" and sometimes "get".
  > > Speaking of "update", vc-update needs to be rethought a bit.
  > > Mercurial, bzr and git (maybe other systems too) don't seem to want to
  > > do merges based on a file, but on changesets.
  > > What should we do about that?
  > 
  > Those backends should simply signal an error if requested to update
  > something less than the whole tree.

So what would the UI be for that?
vc-BACKEND-merge-news currently has a `file' parameter. 
Should backends check if it is a directory, and then run the merge
command? 
Who is responsible for updating all the buffers for files that have
been changed by the merge?