Bug#718329: apt: Please add support for .deb with uncompressed data.tar member

[Guillem Jover <guillem@debian.org>]

Package: apt
Version: 0.9.9.4
Severity: wishlist

Hi!

The apt code does not support uncompressed data.tar .deb members, as
specified by deb(5), which have been supported by since dpkg 1.10.24.

At least the kernel team is currently using «dpkg-deb -Zgzip -z0» on
linux-source-3.10, which generates an uncompressed data.tar.gz member
(which TBH in a strict sense it's bogus for dpkg to create), because
otherwise dak rejects uncompressed .deb data.tar members by way of
python-apt, and finally libapt. dpkg-deb calls that “compressor” «none»,
in case you'd like to have some term consistency.

In any case uncompressed data.tar members are useful in general, when
the contents are all already compressed and there's no gain in
recompressing the member again. AFAIK debdelta is also using those
when reconstructing .debs to feed to dpkg, to avoid duped work.

Thanks,
Guillem