[MacPorts] #28084: Use of composite version specs should be avoided (was: Registry error for ports with underscore ('_') in version)

[MacPorts]

#28084: Use of composite version specs should be avoided
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 Reporter:  ken@…                |       Owner:  macports-tickets@…                   
     Type:  defect               |      Status:  new                                  
 Priority:  Normal               |   Milestone:                                       
Component:  base                 |     Version:  1.9.2                                
 Keywords:  registry version     |        Port:                                       
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Comment(by jmr@…):

 So basically we want to be passing around separate
 version,revision,variants values whenever possible. The use of composite
 versions is a holdover from the flat registry, which ironically avoided
 this problem by actually storing the values this way. (So it would only
 run into trouble if there actually were two versions of a port installed
 at the same time where a different possible interpretation was correct for
 each.)

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Ticket URL: <https://trac.macports.org/ticket/28084#comment:10>
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