Re: [tycho-user] [tycho-dev] <optionalDependencies> configuration parame

["Oberlies, Tobias" <tobias.oberlies@xxxxxxx>]

The point of optional dependencies is that they really need to be optional. Regardless of whether the optional dependencies are required at compile time, I don't want them to be part of the test runtime (by default) in order to test that the core of my bundle doesn't fail with NoClassDefFound exceptions.

In the end, I probably want to test both (e.g. through two profiles or two test modules), but adding bundles to the test runtime (through the <dependencies> parameter) is easier/more intuitive than removing bundles from the test runtime (through target platform <filters>).

I even think that it should not be possible to add all optional dependencies to the test runtime with a single switch. The reason is that such a switch helps you, but it doesn't help your users to install your bundle with all optional dependencies [1]. Instead, I think that you should create an extra feature that brings in the optional dependencies of your code. This allows your users to install your code with all optional stuff, and yourself to run tests with optional dependencies (by adding a <dependency> to the extra feature).

Regards
Tobias


[1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=247342


> -----Original Message-----
> From: tycho-user-bounces@xxxxxxxxxxx [mailto:tycho-user-
> bounces@xxxxxxxxxxx] On Behalf Of Igor Fedorenko
> Sent: Dienstag, 3. Januar 2012 18:19
> To: tycho-user@xxxxxxxxxxx
> Subject: Re: [tycho-user] [tycho-dev] <optionalDependencies> configuration
> parameter
> 
> Can you provide a scenario where you'd want to have optionalDependencies
> set differently for compile dependency resolution and when resolving
> test runtime?
> 
> --
> Regards,
> Igor
> 
> On 12-01-03 10:06 AM, Oberlies, Tobias wrote:
> > Igor Fedorenko wrote:
> >> In order to handle optional dependencies, we've introduced new
> >> <optionalDependencies>  configuration parameter. If the parameter set
> to
> >> "require", the default, Tycho will treat optional dependencies as
> >> required and will fail the build if any of the optional dependencies is
> >> missing or cannot be resolved for some other reason. If set to
> "ignore",
> >> Tycho will completely ignore the optional dependencies.
> >>
> >> The behaviour described above controls project compile classpath and
> >> contents of OSGi test runtime of eclipse-test-plugin project.
> > Currently, this doesn't work reliably [1].
> >
> > IMHO the requirements for the test runtime are generally different to
> what is needed for compilation, so I think there should be separate
> parameters for each.
> >
> > Regards
> > Tobias
> >
> >
> > [1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=367701  Optional
> dependencies in test runtime depends on reactor
> >
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