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path: root/test/integration/test-bug-758153-versioned-provides-support
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2015-09-14implement dpkgs vision of interpreting pkg:<arch> dependenciesDavid Kalnischkies
How the Multi-Arch field and pkg:<arch> dependencies interact was discussed at DebConf15 in the "MultiArch BoF". dpkg and apt (among other tools like dose) had a different interpretation in certain scenarios which we resolved by agreeing on dpkg view – and this commit realizes this agreement in code. As was the case so far libapt sticks to the idea of trying to hide MultiArch as much as possible from individual frontends and instead translates it to good old SingleArch. There are certainly situations which can be improved in frontends if they know that MultiArch is upon them, but these are improvements – not necessary changes needed to unbreak a frontend. The implementation idea is simple: If we parse a dependency on foo:amd64 the dependency is formed on a package 'foo:amd64' of arch 'any'. This package is provided by package 'foo' of arch 'amd64', but not by 'foo' of arch 'i386'. Both of those foo packages provide each other through (assuming foo is M-A:foreign) to allow a dependency on 'foo' to be satisfied by either foo of amd64 or i386. Packages can also declare to provide 'foo:amd64' which is translated to providing 'foo:amd64:any' as well. This indirection over provides was chosen as the alternative would be to teach dependency resolvers how to deal with architecture specific dependencies – which violates the design idea of avoiding resolver changes, especially as architecture-specific dependencies are a cornercase with quite a few subtil rules. Handling it all over versioned provides as we already did for M-A in general seems much simpler as it just works for them. This switch to :any has actually a "surprising" benefit as well: Even frontends showing a package name via .Name() [which doesn't show the architecture] will display the "architecture" for dependencies in which it was explicitely requested, while we will not show the 'strange' :any arch in FullName(true) [= pretty-print] either. Before you had to specialcase these and by default you wouldn't get these details shown. The only identifiable disadvantage is that this complicates error reporting and handling. apt-get's ShowBroken has existing problems with virtual packages [it just shows the name without any reason], so that has to be worked on eventually. The other case is that detecting if a package is completely unknown or if it was at least referenced somewhere needs to acount for this "split" – not that it makes a practical difference which error is shown… but its one of the improvements possible.
2015-08-17Fix the test suite againJulian Andres Klode
Gbp-Dch: ignore
2015-08-10just-in-time creation for (implicit) ProvidesDavid Kalnischkies
Expecting the worst is easy to code, but has its disadvantages e.g. by creating package structures which otherwise would have never existed. By creating the provides instead at the time a package structure is added we are well prepared for the introduction of partial architectures, massive amounts of M-A:foreign (and :allowed) and co as far as provides are concerned at least. We have something relatively similar for dependencies already. Many tests are added for both M-A states and the code cleaned to properly support implicit provides for foreign architectures and architectures we 'just' happen to parse. Git-Dch: Ignore
2015-03-16test exitcode as well as string equalityDavid Kalnischkies
We use test{success,failure} now all over the place in the framework, so its only consequencial to do this in the situations in which we test for a specific output as well. Git-Dch: Ignore
2014-09-27fix progress output for (dist-)upgrade calculationDavid Kalnischkies
Previously, we had a start and a done of the calculation printed by higher-level code, but this got intermixed by progress reporting from an external solver or the output of autoremove code… The higherlevel code is now only responsible for instantiating a progress object of its choosing (if it wants progress after all) and the rest will be handled by the upgrade code. Either it is used to show the progress of the external solver or the internal solver will give some hints about its overall progress. The later isn't really a proper progress as it will jump forward after each substep, but that is at least a bit better than before without any progress indication. Fixes also the 'strange' non-display of this progress line in -q=1, while all others are shown, which is reflected by all testcase changes.
2014-08-26support versioned provides as implemented by dpkgDavid Kalnischkies
APT supported versioned provides for a long while in an attempt to get it working with rpm. While this support is old, we can be relatively sure that it works as versioned provides are used internally to make Multi-Arch:foreign work. Previous versions of apt will print a warning indicating that the versioned provides is ignored, so that something which "Provides: foo (= 2)" doesn't provide anything. Note that dpkg does allow only a equals-relation in the provides line as anything else is deemed too complex. apt doesn't support anything else either and such a support would require potentially big changes. Closes: 758153