variants not preserved on upgrade

[Jeremy Huddleston]

On Jul 31, 2010, at 15:35, Rainer Müller wrote:

> On 2010-08-01 00:07 , Jeremy Huddleston wrote:
>> I have boost installed as +python26+universal:
>> $ port installed boost
>> The following ports are currently installed:
>>  boost @1.42.0_0+icu+python26+universal (active)
>> 
>> but when upgrading, it's trying to pull in openmpi (which is a variant that conflicts with python26).
> 
> I don't see any conflicts between +openmpi and +python26 in the output
> of `port variants boost` or in the Portfile. How did you come to this
> assumption?

From the Portfile:

foreach s ${pythons_suffixes} {
    set p python${s}
    set v [string index ${s} 0].[string index ${s} 1] 
    set i [lsearch -exact ${pythons_ports} ${p}]  
    set c [lreplace ${pythons_ports} ${i} ${i}]
    eval [subst {
        variant ${p} description "Build Boost.Python for Python ${v}" conflicts ${c} debug {
            # Cannot build debug variants with openmpi and python variants as per the following:
            # <http://trac.macports.org/ticket/23667> and <https://svn.boost.org/trac/boost/ticket/4461>