Bug#650601: libpng is ready for transtion

[Tobias Frost <tobi@debian.org>]

Hallo KiBi,

On Tue, 26 Jan 2016 10:51:11 +0100 Cyril Brulebois <kibi@debian.org>
wrote:

> Has anyone tested a debian installer build where some packages were
> built against libpng12-0-udeb and some other against libpng16-16-
udeb?
> Does that work? Or are we looking at a giant transition where
everything
> must switch to libpng16 at once?
> 
> Mraw,
> KiBi.

As requested, I performed those build of the d-i, version 20160106: 

Testmatrix

A libcairo2-udeb_1.14.6-1.1~libpng16_amd64.udeb
B libdirectfb-1.2-9-udeb_1.2.10.0-5.2~libpng16_amd64.udeb 
C libfreetype6-udeb_2.6.1-0.2~libpng16_amd64.udeb
D libgdk-pixbuf2.0-0-udeb_2.32.3-1.1~libpng16_amd64.udeb
E libpng16-16-udeb_1.6.20-1.2~libpng16+patched+1_amd64.udeb
F matchbox-keyboard-udeb_0.1+svn20080916-10.1~libpng16_amd64.udeb

Two more udeb packages where generated during the mass rebuild on my
server, bu removed from test-matrix, as they do not Depend: on libpng:
libslang2, libdirectfb-bin

Key x -> libpng16-version used
    . -> standard version used

   A B C D E F   result   (comment)
1  . . . . . .   builds   "control group"
2  x . x . x .   builds     
3  . x x . x .   builds
4  . . . x x .   builds
5  . x . x x x   builds   
6  x x x x x x   builds   "target version" 


Procedure:
- debuld in debian-installer directory.
- examination of created debian-installer-images tarball, especially
the MANIFEST.udebs file for installed udebs (if matches expectations,
if both libpngs are present


Let me know if you want to see other combinations tested too (and
which)

Thanks
-- 
tobi