Bug#672664: lintian: Please add a check on udeb non-emptiness

[Cyril Brulebois <kibi@debian.org>]

Package: lintian
Version: 2.5.6
Severity: important
Tags: d-i

Hi,

it would be nice if lintian could check an udeb isn't empty.

(There might legitimate cases where udebs ship no contents, and just
contain maintainer scripts/debconf stuff, so I'm cc-ing debian-boot@
for input.)

Real life example: fonts-tibetan-machine-udeb_1.901b-3_all.udeb was
entirely empty after the package got renamed to follow the fonts policy
(losing a .install file), leading to missing fonts in d-i. The same
was seen in other packages too. Once the check is added, we should be
able to evaluate a (let's say) udeb-is-empty warning page on lintian.d.o
and see whether we have other issues, or false positives.

Thanks for considering.

Mraw,
KiBi.