[MacPorts] #35004: macports.tcl _is_valid_developer_dir is checking for Developer/Headers?

[MacPorts]

#35004: macports.tcl  _is_valid_developer_dir is checking for Developer/Headers?
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 Reporter:  llattanzi+McF@…        |       Owner:  macports-tickets@…                   
     Type:  defect                 |      Status:  new                                  
 Priority:  Normal                 |   Milestone:                                       
Component:  base                   |     Version:  2.1.1                                
 Keywords:                         |        Port:                                       
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Comment(by deadshort@…):

 This becomes a noticeable problem with new Xcodes, especially if you have
 several of them (/Applications/Xcode4{3,4,5}-DPx.app, etc) for one reason
 or another. The simple case in macports::set_developer_dir falls through
 to a pretty confusing message, given that it cannot be fixed. That
 function might also select /Applications/Xcode.app, which might not be the
 right one.

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Ticket URL: <https://trac.macports.org/ticket/35004#comment:2>
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