[MacPorts] #31248: Split PostGIS variants into separate ports

[MacPorts]

#31248: Split PostGIS variants into separate ports
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 Reporter:  dark.panda+macports@…          |       Owner:  macports-tickets@…                   
     Type:  defect                         |      Status:  new                                  
 Priority:  Normal                         |   Milestone:                                       
Component:  ports                          |     Version:  2.0.3                                
 Keywords:                                 |        Port:                                       
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 Since the base PostgreSQL ports are separate and can be run alongside one
 another, it would be helpful if the PostGIS port, or any port relying on
 PostgreSQL, were port-based instead of variant-based. I sometimes have to
 run multiple versions of PostgreSQL, but I don't think I can easily run
 multiple versions of PostGIS since you'd need to install the PostGIS port
 multiple times, each with a different variant, and multiple variants can't
 be enabled concurrently.

 It would be helpful if there were multiple PostGIS ports, i.e. postgis90,
 postgis91, etc., allowing for separate PostGIS installs for each
 PostgreSQL install.

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Ticket URL: <https://trac.macports.org/ticket/31248>
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