trigger tests for updated reverse test dependencies

[Steve Langasek]

Tracking down the cause of the php5 stalls, I found that the regression in the php-codecoverage tests was caused not by a regression in php5, which it blocks, but in xdebug, which it did *not* block.

This is because xdebug is a test dependency of php-codecoverage but not a build or runtime dependency of it. As a result, xdebug was allowed to regress the state of php-codecoverage's tests in the release pocket, undetected.

Should we trigger tests for test dependencies as well?

[Martin Pitt (pitti)]

Yes, we absolutely should. This has been on the wish list for a long time, and about half a year ago Adam and I talked to the Debian dpkg maintainers how to implement this efficiently. I'm linking to the dpkg bug.

In short, the plan is to make dpkg-source add the collection of test dependencies to the .dsc so that they will appear in the archive's Sources.gz. Then we can actually do a query like "what are the reverse test dependencies of package X", which isn't possible right now.

[Martin Pitt (pitti)]

For the record, summary/decision from the Debian bug report: dpkg-source -b adds a new field

  Testsuite-Triggers: foo, bar, baz

from the union of all testsuites test depends, minus @ and @builddeps@, without versions, and with alternatives split (i.e. a simple comma separated package list). If the field is present then it overrides the automatically extracted value.

[Launchpad Janitor (janitor)]

This bug was fixed in the package dpkg - 1.18.9ubuntu1

---------------
dpkg (1.18.9ubuntu1) yakkety; urgency=medium

  * Merge with Debian unstable, pulling in fix for dpkg-buildpackage.

dpkg (1.18.9) unstable; urgency=medium

  * Require Dpkg::Control::Info in dpkg-buildpackage.
    Initially reported by Helmut Grohne <email address hidden>.
    Regression introduced in dpkg 1.18.8. Closes: #829542
  * Documentation:
    - Fix user configuration filename in dpkg-buildpackage(1).
      Thanks to Sven Joachim <email address hidden>. Closes: #829546

 -- Adam Conrad <email address hidden> Mon, 04 Jul 2016 04:48:25 -0600

[Martin Pitt (pitti)]

I implemented this some weeks ago: https://git.launchpad.net/~ubuntu-release/britney/+git/britney2-ubuntu/commit/?id=c51164a8