[69423] trunk/dports/tex/rubber/Portfile

[Ryan Schmidt]

On Jul 6, 2010, at 01:05, Emmanuel Hainry wrote:

> Citando Ryan Schmidt :
>> 
> 
>> On Jul 5, 2010, at 09:38, milosh at macports.org wrote:
>> 
>>> +default_variants +python26
>> 
>> This variant should only be the default if the user has not already requested to use a different one.
>> 
>>> +variant python24 description {Use python2.4} {
>>> +        depends_lib-append      port:python24
>>> +        configure.args-append   --python=${prefix}/bin/python2.4
>>> +}
>>> +
>>> +variant python25 description {Use python2.5} {
>>> +        depends_lib-append      port:python25
>>> +        configure.args-append   --python=${prefix}/bin/python2.5
>>> +}
>>> +
>>> +variant python26 description {Use python2.6} {
>>> +        depends_lib-append      port:python26
>>> +        configure.args-append   --python=${prefix}/bin/python2.6
>>> +}
>>> +
>>> +variant python27 description {Use python2.7} {
>>> +        depends_lib-append      port:python27
>>> +        configure.args-append   --python=${prefix}/bin/python2.7
>>> +}
>> 
>> These variants should be marked as conflicting with one another.
> 

> I never used "conflicts". How does it work? And what does it do? I
> would expect that if you choose a variant, it will prevent any
> conflicting variant to be selected. From your first remark, I gather
> it is not the case.
> 
> As I said earlier, variants, I can write (and conflicts, I will
> add), but tcl code, I do not know.

Yes, marking variants as conflicting with one another will prevent the user from choosing more than one of them at the same time. So you want to write:

variant python24 conflicts python25 python26 python27 description {Use python 2.4} {
        depends_lib-append      port:python24
        configure.args-append   --python=${prefix}/bin/python2.4
}

variant python25 conflicts python24 python26 python27 description {Use python 2.5} {
        depends_lib-append      port:python25
        configure.args-append   --python=${prefix}/bin/python2.5
}

variant python26 conflicts python24 python25 python27 description {Use python 2.6} {
        depends_lib-append      port:python26
        configure.args-append   --python=${prefix}/bin/python2.6
}

variant python27 conflicts python24 python25 python26 description {Use python 2.7} {
        depends_lib-append      port:python27
        configure.args-append   --python=${prefix}/bin/python2.7
}

As for default variants, you want to write:

if {![variant_isset python24] && ![variant_isset python25] && ![variant_isset python26] && ![variant_isset python27]} {
        default_variants +python26
}