Bug#930487: lintian: speed up test suite CI

["Chris Lamb" <lamby@debian.org>]

Hi Felix,

> > I'm very much in favour of us exhausting all caching opportunies, both
> > on our CI system and locally,
> 
> Would it help to separate the build product for each test package,
> which will presumably be cached, from the test output (tags.actual,
> tagdiff and friends)?

Let's zoom out here so we are not asking "Xy questions" of each other.

I think the most common use-case is that I make some change — possibly
extremely minor — in, say, checks/foo.pm and I want to re-run the
testsuite to check that I've fixed whatever false-positive or edge-case
in a tag that I am in the process of implementing. We should optimise
for kind of pattern. What do you think?

What this means in terms of the implementation detail of the testsuite
(which I'm afraid I have let get beyond my insight) I would have to
leave up to you, alas.


Regards,

-- 
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     : :'  :     Chris Lamb
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