[107013] trunk/dports/devel

[Dennis van Dok]

On 16-06-13 06:58, Ryan Schmidt wrote:
> On Jun 15, 2013, at 23:28, Adam Mercer <ram at macports.org> wrote:
> 
>> On Sat, Jun 15, 2013 at 8:29 PM, Ryan Schmidt <ryandesign at macports.org> wrote:
>>
>>>> Added: trunk/dports/devel/globus-core/Portfile
[...]
>>> At the time this line is run, you cannot assume that perl has already been installed.
>>
>> Is there any way that we can get this information?
> 
> You can run the command yourself on the command line, for the version
> of perl that you want globus-core to use, and then put that value
> into the portfile (modulo using ${prefix} as usual).
> The problem with trying to run it in the portfile is that it's not
> predictable or repeatable: it depends on what "perl" is. Via the
> variants of the perl5 port, that can vary on the user's system, or as
> I mentioned, in the extreme case of not having perl5 installed at
> all, "perl" is "/usr/bin/perl". That's in fact what happens on the
> buildbot, because the buildbot never has any ports installed prior to
> a build. (All ports are uninstalled after every build.) So on the
> buildbot, 'sh -c "eval \"\`perl -V:installvendorlib\`\" ; echo
> \$installvendorlib"' is '/Network/Library/Perl/5.12'. 

Can I use this code from the perl5 portGroup:

in /opt/local/var/macports/sources/rsync.macports.org/release/ports/_resources/port1.0/group/perl5-1.0.tcl:

proc perl5_get_default_branch {} {
    global prefix
    # use whatever ${prefix}/bin/perl5 was chosen, and if none, fall back to 5.12
    if {![catch {set val [lindex [split [exec ${prefix}/bin/perl5 -V:version] {'}] 1]}]} {
        return [join [lrange [split $val .] 0 1] .]
    } else {
        return 5.12
    }
}

This logic seems pretty safe even if perl is not installed. The only thing that bugs me is that
the version returned is 5.12.4 and not 5.12.

Thanks,

Dennis