Re: Cyclic dependency, please fix

[Jens Rehsack <rehsack%googlemail.com@localhost>]

Aleksey Cheusov wrote:
>  >>> My distbb detected the following problem.
> 
>  >> Your distbb is wrong.
> 
>> Ah, I realised
> Stop. That missed feature doesn't relate to this problem at all.
> 
> I still don't understand why the following is not a cycle.
> 
>    0 p5-version>bmake show-var VARNAME=BUILD_DEPENDS
>    {perl>=5.10,p5-Module-Build>=0.2608nb1}:../../devel/p5-Module-Build
> 
>    0 p5-version>cd ../p5-Module-Build
>    0 p5-Module-Build>bmake show-var VARNAME=DEPENDS
>    ...
>    p5-version>=0.74:../../devel/p5-version
>    ...
> 
>    0 p5-Module-Build>
> 
> Also I don't see a documentation for
> 
>     {perl,completely-different-pkg}:../../devel/completely-different-pkg
> 
> syntax in pkgsrc Guide section 19.1.7 and pkg_info(1).
> 
> According to the documentation above {} braces should be expanded to
> 
>     perl:../../devel/completely-different-pkg
>     completely-different-pkg:../../devel/completely-different-pkg

I hope I can explain from my simple point of view:
Module::Build is a core module of perl-5.10, so depending on perl>=5.10
would be enough. To give those developers a hint which want to use a
bug fixed or feature enhanced version, the second dependency is added.
Maybe it's a dirty trick (I do not understand enough to have a real
opinion), but it should work.

As far as I understood the syntax used here
>    {perl>=5.10,p5-Module-Build>=0.2608nb1}:../../devel/p5-Module-Build
I think it means: it can depend either on X or Y, and building ../../A/Y
would satisfy at least on of the requirements.

>
> And there is no perl package in devel/completely-different-pkg.
> I don't understand this. Any help?

Finally perl is a dependency of pkgsrc/devel/p5-Module-Build:
>       USE_TOOLS+=     perl
>
>       .include "../../lang/perl5/module.mk"

/Jens