Bug#940748: lintian: False positives on debug-symbol-migration-possibly-complete

[Guillem Jover <gjover@sipwise.com>]

Package: lintian
Version: 2.21.0
Severity: normal

Hi!

Was recently introducing an automatic debug symbol package, and got
this lintian warning, which seems just wrong. I think the correct way
to go about emitting it would be to:

  - Check for the m/--(?:ddeb|dbgsym)-migration=/ and extract the
    version in the argument list (if possible, probably emit if the
    version cannot be extracted?).
  - Lookup the closest version in the debian/changelog, and fetch the
    date for that entry.
  - Lookup the $name for the current $distro release.
  - Lookup the initial date for the previous ($name-1) $distro release.
  - Check whether the changelog entry date is earlier than $name-1 date,
    and only if so, emit the tag.

Thanks,
Guillem