On Tue, 05 Aug 2008 22:55:06 -0700
Zac Medico <zmedico@g.o> wrote:
> Would having the ebuild perform locking be unportable or introduce
> any undesirable complexity? Does it really need to be so
> fine-grained?

It's not particularly tricky, and the lock code can be moved into an
eclass if necessary. And the gain is worth it -- scm fetches can be
slow, so parallelising fetches from different hosts will speed things
up quite a bit.

> I don't see flock listed in the spec here [1].

If any platform doesn't have flock, there're various other ways of
doing locking using mkdir and either a fifo or just plain old sleep.

-- 
Ciaran McCreesh