[MacPorts] #46570: git, openbrowser, ossp-uuid, xraylib: remove variants perl5_12, perl5_14, introduce support for 5.18 and 5.20

[MacPorts]

#46570: git, openbrowser, ossp-uuid, xraylib: remove variants perl5_12, perl5_14,
introduce support for 5.18 and 5.20
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  Reporter:  mojca@…                             |      Owner:  macports-
      Type:  enhancement                         |  tickets@…
  Priority:  Normal                              |     Status:  new
 Component:  ports                               |  Milestone:
Resolution:                                      |    Version:
      Port:  git, openbrowser, ossp-uuid,        |   Keywords:
  xraylib, biblatex-biber, intltool              |
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Comment (by pixilla@…):

 Replying to [comment:10 mojca@…]:
 > I have a question for `pixilla`: what is the difference between
 `perl5.require_variant` and `perl5.set_default_variant`?

 `perl5.require_variant yes` will produce an error if a perl variant is not
 selected, say someone does "`port install foo -perl5_20`" to negate a
 default `+perl5_20`.

 `perl5.default_variant` is always set to a perl variant and defaults to
 `perl5.default_branch`, one can set `perl5.default_variant` to something
 else in the Portfile. `perl5.default_variant` may be redundant since
 `perl5.default_branch` can achieve the same effect.

 `perl5.set_default_variant` is used to control whether to actually set a
 default perl variant.

-- 
Ticket URL: <https://trac.macports.org/ticket/46570#comment:17>
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