Recording TIMESTAMPs in distinfo for reproducible builds work

[Baptiste Daroussin]

On Fri, May 13, 2016 at 01:58:51PM +0200, Ben Woods wrote:
> On Thursday, 12 May 2016, Ed Maste <emaste at freebsd.org> wrote:
> 
> > Baptiste and I have been looking at reproducible builds in the FreeBSD
> > ports tree, and one thing we'll need is a consistent timestamp that
> > doesn't change when a port is rebuilt without changes.
> >
> > We considered a few different ideas, and have settled on experimenting
> > with the time 'make makesum' is run.
> >
> 
> Hi Ed,
> 
> Thanks for the heads up.
> 
> Quick question: is there now an expectation that each time a port is
> changed the timestamp should be updated?

Nope the goal is to change it as little as possible aka only when the main
distfile actually change
> 
> I.e. If a port changes in a way which does not change the distfiles, are we
> supposed to run "make makesum" again anyway to record it has changed?

Nope
> 
> Or is the timestamp only supposed to change when the port is updates /
> distfiles change?

The make makesum command will do everything automagically

Best regards,
Bapt
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