[MacPorts] #13141: Installer packages should prevent installation on wrong Mac OS X version

[MacPorts]

#13141: Installer packages should prevent installation on wrong Mac OS X version
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  Reporter:  ryandesign at macports.org  |       Owner:  macports-dev at lists.macosforge.org
      Type:  enhancement              |      Status:  new                              
  Priority:  Normal                   |   Milestone:  MacPorts base enhancements       
 Component:  base                     |     Version:  1.5.0                            
Resolution:                           |    Keywords:                                   
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Comment (by ryandesign at macports.org):

 Surely you just want `sw_vers -productVersion`. But I don't think the
 problem is "How do I determine the current OS version?" I think the
 problem is "How do I instruct the Installer to run this custom script
 before allowing my package to be installed?" I didn't know Leopard changed
 the way to do this, but I don't think it matters. Surely Leopard must
 still be able to read older package formats. So we can continue to use the
 older package format that we understand, with the VolumeCheck script or
 whatever.

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Ticket URL: <https://trac.macosforge.org/projects/macports/ticket/13141#comment:5>
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