[MacPorts] #25040: lilypond 2.12.3 FTB with Python 3 selected

[MacPorts]

#25040: lilypond 2.12.3 FTB with Python 3 selected
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 Reporter:  gale@…          |       Owner:  snc@…           
     Type:  defect          |      Status:  new             
 Priority:  Normal          |   Milestone:                  
Component:  ports           |     Version:  1.8.2           
 Keywords:                  |        Port:  lilypond        
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Comment(by gale@…):

 Replying to [comment:2 snc@…]:
 > If I'm reading this correctly, there are two issues:
 > the program doesn't build against a specific version of python
 > and nothing prevents python3x from satisfying the dependency.

 No, not exactly. From the dependency point of view, the port
 is pulling in a good version of python, python25.
 python3x does not play any role at all there.

 The problem is that even though python25 is correctly
 pulled in as a dependency by the port file, the build
 proceeds to ignore it. It runs python31 instead, causing
 it to fail.

 That is because the build scripts don't call up version
 2.5 of python explicitly. They just run python. So the version
 of python that will actually run is totally independent of the
 port file. It depends instead on whatever the user happened to
 set as the default version of python using the python_select
 port. Or possibly even no python at all will run if the
 user never used python_select.

 So I guess another fix would be to go through the build
 system of this port - makefiles, scripts, and python file
 shell bangs - and patch them all to run python25
 explicitly.

 I'm suggesting that maybe the time has come to
 implement a general solution that will provide an easy fix
 for all ports that have this problem. Instead of hunting
 for a port-specific hack each time.

 But if the MacPorts team decides against that and just
 fixes this port, I'll happily install it :)

-- 
Ticket URL: <http://trac.macports.org/ticket/25040#comment:3>
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