Re: [PATCH] gnu: Add ruby-libxml and bioruby.

[Pjotr Prins <pjotr.public12@thebird.nl>]

On Tue, Sep 15, 2015 at 08:58:28AM -0400, Thompson, David wrote:
> > +    (native-inputs `(("ruby-libxml" ,ruby-libxml)))
> 
> This should be a propagated input.

oops. I can be such a noob.

> > +    (inputs
> > +     `(("coreutils" ,coreutils)  ; required for /bin/echo in tests
> 
> Coreutils is an implict input to the Ruby build system.

well, echo is not found by which, so coreutils is missing.

> > +       ("which" ,which)))        ; required for tests
> 
> This should be a native input since it's only needed at build time.

OK.

> Usually gems with native extensions just redundantly build themselves
> in the source directory before running tests, which I guess is not the
> case here.
> 
> It looks like you need to at least add ruby-rake-compiler to
> native-inputs and run 'rake compile' before running the tests. 

I tried that.

> I tried to do this outside the build container from a git checkout
> and several tests failed.  Give it a shot in the build recipe and
> see how it goes.  If the problems are very difficult to solve, we
> can leave the tests disabled with a note about the failures and
> problems to solve.

No dice.

> Unfortunately, it seems there's no way to avoid compiling native
> extensions twice when we do run tests since it needs to be compiled in
> the source tree for tests, and then again when running 'gem install'.
> The Ruby way of building things leaves much to be desired.

Aye. Tests assume an already installed extension. The good news is
that bioruby tests include ruby-libxml tests. So, at least, the
integration works.

Pj.