Re: [Q] Determing if a commit is reachable from the HEAD ?
On Friday 20 January 2012 23:50:23 Sitaram Chamarty wrote:
Show 14 quoted lines
> On Fri, Jan 20, 2012 at 7:03 PM, Brian Foster <brian.foster@maxim-ic.com> wrote:
>[ ... ]
> > x---Y---y---y---y HEAD
> > /
> > ...--o---o---C---o---S
> > \
> > n---n---N---*---* other
> >
> > In a script, how can I determine commit Y is reachable
> > from the current HEAD ? [ ... ]
>
> I've been using 'git rev-list HEAD..Y'. If it produces any output,
> Y is not reachable from HEAD (there is something in Y that is not
> in HEAD).
What's interesting about this solution, at least
with GIT v1.7.6.1 (I haven't tried other versions),
is ‘git rev-list HEAD..Y’ does seem to work (if
there is any output, then Y is not reachable from
HEAD), but ‘git rev-list --quiet HEAD..Y’ does _not_
work (it seems to always(?) exit status 0).
I am probably misunderstanding ‘--quiet’, which the
man page cryptically describes as “... allow the
caller to test the exit status to see if a range
of objects is fully connected (or not).” What is
meant here by “fully connected” ?
cheers!
-blf-
--
Brian Foster
Principal MTS, Software | La Ciotat, France
Maxim Integrated Products | Web: http://www.maxim-ic.com/