[MacPorts] #40333: py-wxpython-2.8 dependencies: add proper variants for proper use of wxWidgets-2.8 vs. wxgtk-2.8

[MacPorts]

#40333: py-wxpython-2.8 dependencies: add proper variants for proper use of
wxWidgets-2.8 vs. wxgtk-2.8
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  Reporter:  mojca@…                             |      Owner:  macports-
      Type:  defect                              |  tickets@…
  Priority:  Normal                              |     Status:  new
 Component:  ports                               |  Milestone:
Resolution:                                      |    Version:
      Port:  py-wxpython-2.8 spe grass py-dsv    |   Keywords:
  py-pyface py-robotframework-ride py26-pyphant  |
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Comment (by mojca@…):

 Here are some thoughts.

 I would suggest to use the same names for variants as for `wxWidgets`
 dependents, namely:
   * `variant wxwidgets30 conflicts wxgtk28 wxwidgets28 description {Use
 wxPython 3.0 (not fully functional yet)}`
   * `variant wxwidgets28 conflicts wxgtk28 wxwidgets30 description {Use
 32-bit Carbon-based wxPython 2.8}`
   * `variant wxgtk28 conflicts wxwidgets28 wxwidgets30 description {Use
 GTK-based wxPython 2.8}`

 Some restrictions:
   * `wxwidgets30` option shouldn't be available for `${python.version} <
 27`

 The variant `wxwidgets28` could do something like the following:
 {{{
 # this also sets `supported_archs i386 ppc` which is nice,
 # while on the other hand it probably shouldn't blacklist `clang`
 wxWidgets.use           wxWidgets-2.8
 depends_lib-append      port:py${python.version}-wxpython-2.8
 require_active_variants port:py${python.version}-wxpython-2.8 carbon gtk
 }}}

 so maybe the syntax could be:
 {{{
 variant wxwidgets28 conflicts wxgtk28 wxwidgets30 description {Use 32-bit
 Carbon-based wxPython 2.8} {
     wxPython.depends    ${python.version} wxWidgets-2.8
     # conditionally print the following notes on x86_64
     notes "To run, use 'arch -i386 <binary_name>' to use 32-bit
 architecture"
 }
 }}}

 where "`wxPython.depends 27 wxWidgets2.8`" could take care of the
 following:
 {{{
 universal_variant   no
 supported_archs     i386 ppc

 pre-fetch {
     # 10.8 (or later) -or- 10.7 with Xcode 4.4 (or later)
     if {${os.major} >= 12 || [vercmp $xcodeversion 4.4] >= 0} {
         ui_error "Port depends on wxWidgets-2.8 which cannot be built on
 Moc OS X >= 10.7 with Xcode >= 4.4"
         return -code return "Port depends on wxWidgets-2.8 which cannot be
 built on Moc OS X >= 10.7 with Xcode >= 4.4"
     }
 }

 depends_lib-append      port:py${python.version}-wxpython-2.8
 require_active_variants port:py${python.version}-wxpython-2.8 carbon gtk
 }}}
 and the strategy to select the right variant could be something like the
 following (partially pseudocode):
 {{{
 if {![variant_isset wxwidgets30] && ![variant_isset wxwidgets28] &&
 ![variant_isset wxgtk28]} {
     # if wxpython-2.8 is already installed, use the installed one
     if {wxPython.is_installed ${python.version} 2.8} {
         # if py2X-wxpython-2.8 +carbon was installed
         if { wxPython.is_active ${python.version} wxWidgets-2.8 } {
             default_variants +wxwidgets28
         } else {
             default_variants +wxgtk28
         }
     } else {
         if {wxPython.is_carbon_supported} {
             default_variants +wxwidgets28
         } else {
             default_variants +wxgtk28
         }
     }
 }
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/40333#comment:5>
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