Bug#762105: lintian: package-contains-timestamped-gzip incorrectly complains about files from the upstream tarball

[Jakub Wilk <jwilk@debian.org>]

Hi Stuart!

* Stuart Prescott <stuart@debian.org>, 2014-09-18, 23:35:
> The package-contains-timestamped-gzip tag complains about gzipped files 
> that are in the upstream tarball. While it is true that these files 
> were compressed and contain a timestamp, it is not true that this 
> timestamp will be different each time the package is built,
[...]
> It would be best if lintian didn't complain about compressed files that 
> are also present in the upstream package.

I think the following heuristics, which doesn't require access to the 
source package, should work well:

If the gzip timestamp is older than the timestamp from the changelog 
trailer, then the file wasn't generated at build time, and 
package-contains-timestamped-gzip shouldn't be emitted.

--
Jakub Wilk