Find specific changes between revisions

[Mario Lobo]

On Sun, May 10, 2020 at 1:03 PM Daniel Ebdrup Jensen <debdrup at freebsd.org>
wrote:

> On Sun, May 10, 2020 at 10:41:24PM +0700, Eugene Grosbein wrote:
> >10.05.2020 5:52, Mario Lobo wrote:
> >
> >> The command:
> >>
> >> svn diff https://svn.freebsd.org/base/stable/11@359971
> >> https://svn.freebsd.org/base/stable/11@360676
> >>
> >> yielded a 170 Mbytes file!!
> >>
> >> It will be like looking for a needle in a haystack, in the dark, with
> just
> >> a hunch of where the needle was dropped.
> >>
> >> Well ... at least I have the haystack.
> >>
> >> Thanks everyone for the tips!
> >
> >You don't really need to study source code to bisect the problem,
> >just use "svnlite update -rZZZZZ" to move your source tree to the middle
> point
> >between known working and non-working revisions. Then rebuild and
> reinstall
> >kernel and world, reboot and re-do the test. If it works, you get new
> (higher)
> >working revision and if not, you get new (lower) non-working one.
> >
> >Repeat until you have only single revision between working and
> non-working.
> >This procedure takes time and effort but this is not like looking for a
> needle in a haystack, much easier.
> >_______________________________________________
> >freebsd-hackers at freebsd.org mailing list
> >https://lists.freebsd.org/mailman/listinfo/freebsd-hackers
> >To unsubscribe, send any mail to "freebsd-hackers-unsubscribe at freebsd.org
> "
>
> If you're going to be doing this kind of rebuilding from revision to
> revision, I
> feel obliged to mention that you can put MetaMode [1] to great use.
>
> Essentially, it ensures that you only rebuild whatever's changed from one
> revision to another, and on the source tree it can make a HUGE difference
> when
> jumping small revision amounts (and even if large numbers of revisions are
> jumped over, it still has some impact.
> It's sort of like ccache, except much more efficient.
>
> Yours,
> Daniel Ebdrup Jensen
>
> [1]: https://wiki.freebsd.org/MetaMode
>

Thanks mates.

I've been using meta mode for a while.

I'll follow the svn up -rNNNNNN procedure.

-- 
Mario Lobo
http://www.mallavoodoo.com.br
FreeBSD since version 2.2.8 [not Pro-Audio.... YET!!]