[Piuparts-devel] Bug#748796: piuparts: should not use dist-upgrade to check for a single package upgrade

[Andreas Beckmann]

On 2014-05-21 13:08, Holger Levsen wrote:
> On Dienstag, 20. Mai 2014, Yann Dirson wrote:
>> http://bugs.debian.org/726799 shows that, while using dist-upgrade may
>> be useful and can reveal problems, it does not test *just* the package
>> upgrade it claims to be testing (sounds obvious, but well... ;).
> 
> Yes, it's obvious and I'd also argue it's obviously the right thing to do. So 
> in fact I'm also considering to just close your bug (as not a bug, but design) 
> and/or make it wishlist and close it then.
> 
> The usual way to upgrade the system is precisely to use "apt-get upgrade" or 
> "apt-get dist-upgrade" and _not_ to upgrade a single package with "apt-get 
> install $package/$version" - that's not a common real world use case.

IIRC piuparts even did the apt-get install way in the past - this
usually failed if the upgrade involved a bigger transition that requires
removal of some packages...

I might consider doing "apt-get install" upgrade tests (since they
operate on "valid" systems as long as no --force-* options get involved)
in addition to the "normal" distupgrade tests if they can uncover
problems not found by distupgrade tests - but only if they don't create
false positives (or these can be filtered automatically).
And I'd like to see an example first...

Andreas