[MacPorts] #53089: option-contains

[MacPorts]

#53089: option-contains
-------------------------+-----------------
 Reporter:  RJVB         |      Owner:
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  base         |    Version:
 Keywords:  haspatch     |       Port:
-------------------------+-----------------
 This is a little prototype patch that adds a "contains" function to the
 options mechanism, something I've often missed when trying to do things
 like adding depspecs cleanly.

 Example:

 {{{
 if {![depends_build-contains port:pkgconfig]} {
     # pkgconfig already added by one of the included PortGroups
     depends_build-append port:pkgconfig
 }
 }}}

 or

 {{{
 variant qtA description {support Qt component "A"} {
     # someday: qt5.depends_component qt-a
     depends_lib-append port:qt5-qt-a
 }
 variant qtB description {support Qt component "B"} {
     # someday: qt5.depends_component qt-b
     depends_lib-append port:qt5-qt-b
 }
 ...

 # pull in some runtime dependency made necessary by either of the qt
 variants,
 # checking for the dependency pattern rather than using multiple
 variant_isset calls
 if {[depends_lib-contains -regexp port:qt5-qt-*]} {
     depends_run-append port:shared_runtime_dependency
 }
 }}}

 Ideally the handle_option-contains procedure would scan over $args and
 catch all lsearch arguments, but that may be overkill.

--
Ticket URL: <https://trac.macports.org/ticket/53089>
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