[MacPorts] #13707: MacPorts installer should warn if /opt is not a directory

[MacPorts]

#13707: MacPorts installer should warn if /opt is not a directory
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 Reporter:  martin.streicher at gmail.com  |       Owner:  macports-tickets at lists.macosforge.org
     Type:  defect                      |      Status:  new                                  
 Priority:  Normal                      |   Milestone:  MacPorts base bugs                   
Component:  ports                       |     Version:  1.6.0                                
 Keywords:  installer                   |  
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 My machine had a symbolic link named /opt, which pointed to a non-existent
 directory named /private/opt. When I tried to install MacPorts, the
 preflight script failed to create /opt and so the install failed. Perhaps
 an error message would be helpful, if /opt wasn't a true directory.

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Ticket URL: <http://trac.macosforge.org/projects/macports/ticket/13707>
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