Bug#395925: gst-plugins0.8: Messes with .diff.gz and no longer rebuilds

[Helge Kreutzmann]

Hello Loïc,
On Sat, Oct 28, 2006 at 10:00:51PM +0200, Loïc Minier wrote:
> On Sat, Oct 28, 2006, Helge Kreutzmann wrote:
> > All this in an i386 up to date changeroot, but I doubt it is
> > architecture specific (can try x86_64 and ppc testing, if needed).
> > 1. Download gst-plugins0.8 (orig.tar.gz and diff.gz). 
> > 2. Record md5sums:
> > aab4331c2b134ad935cfdefa380525d4  gst-plugins0.8_0.8.12-5.diff.gz
> > 4a6c5f5384d148c752311b32c5f9a122  gstreamer0.8_0.8.12.orig.tar.gz
> > 3. Unpack gstreamer0.8_0.8.12.orig.tar.gz, apply diff.gz and run
> >    debuild. All debs build fine (of course, signing fails). 
> 
>  How do you "apply" the diff?  You do use dpkg-source -x, right?

tar xvzf gstreamer0.8_0.8.12.orig.tar.gz
cd gst-plugins-0.8.12
zcat ../gst-plugins0.8_0.8.12-5.diff.gz | patch -p1

> > 4. Record md5sums:
> > 5cad60c0f5b6ae34f92d333b24c4b028  gst-plugins0.8_0.8.12-5.diff.gz
> > 4a6c5f5384d148c752311b32c5f9a122  gstreamer0.8_0.8.12.orig.tar.gz
> >    As you can see, the diff.gz has a different md5sum. 
> 
>  The diff is constructed before the build, so I think you manipulate
>  .diff.gz files incorrectly.  When you type "debuild", one of the first
>  things that happens is to build a .diff.gz with dpkg-source -b.  This
>  diff might differ with the one you downloaded because the "clean"
>  target is run.

Ok. And I don't mind as long as the package is still buildable with
the new "diff.gz". Is there a reason the original is not build the
same way, i.e. after the "clean" target is run?

And funnily, the diff changes *every* time the package is built, it 
seems as if the "clean" target is not consistent?

>  It was even discussed very recently (on debian-devel@ ISTR) that we
>  change the policy so that the requirement is to have the same diff.gz
>  after two run of the clean targets (and not between an unpack and a run
>  of the clean target).

Ok.

> > 5. Run debuild again.
> >    Now the build fails with:
> > make[1]: Leaving directory `/debuild/NEU-G/gst-plugins-0.8.12'
> > patches: debian/patches/20_gst-doc-m4.patch debian/patches/30_gstcacasink-header-include.patch debian/patches/50_ladspa-quiet.patch debian/patches/51_wavpack-big-endian.patch debian/patches/70_relibtoolize.patch
> > Trying patch debian/patches/20_gst-doc-m4.patch at level 1...success.
> > Trying patch debian/patches/30_gstcacasink-header-include.patch at level 1...success.
> > Trying patch debian/patches/50_ladspa-quiet.patch at level 1...0...2...failure.
> 
>  That's presumably another problem, which might be that the package does
>  not clean correctly after build, and that you can't do this:
>  1) build
>  2) clean
>  3) build

1) debuild - builds fine
2) fakeroot make -f debian/rules clean   - takes a while, but suceeds
3) debuild - failes with

make[1]: Leaving directory `/debuild/NEU-G/gst-plugins-0.8.12'
patches: debian/patches/20_gst-doc-m4.patch debian/patches/30_gstcacasink-header-include.patch debian/patches/50_ladspa-quiet.patch debian/patches/51_wavpack-big-endian.patch debian/patches/70_relibtoolize.patch
Trying patch debian/patches/20_gst-doc-m4.patch at level 1...success.
Trying patch debian/patches/30_gstcacasink-header-include.patch at level 1...success.
Trying patch debian/patches/50_ladspa-quiet.patch at level 1...0...2...failure.
make: *** [debian/stamp-patched] Fehler 1
debuild: fatal error at line 1224:
debian/rules build failed


>  If this is true, this is a real bug, but not of very important severity
>  either.  Since I have some doubts on how you extracted the package, I
>  would prefer if you could confirm which of the problems I described you
>  really have.

My main issue was that I could not build the package twice in a row
(very useful for debugging). This only would probably (in my scale) be
"normal". I chose "important" becaue additionally I had to retrieve
the diff.gz again. Of course, please choose the severity appropriate
for you.

Greetings

           Helge
-- 
      Dr. Helge Kreutzmann                     debian at helgefjell.de
           Dipl.-Phys.                   http://www.helgefjell.de/debian.php
        64bit GNU powered                     gpg signed mail preferred
           Help keep free software "libre": http://www.ffii.de/
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