[MacPorts] #14648: Specifying a nonexistant variant during install should cause a warning

[MacPorts]

#14648: Specifying a nonexistant variant during install should cause a warning
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 Reporter:  wsiegrist at apple.com      |       Owner:  macports-tickets at lists.macosforge.org
     Type:  enhancement              |      Status:  new                                  
 Priority:  Normal                   |   Milestone:  MacPorts base enhancements           
Component:  base                     |     Version:  1.7.0                                
 Keywords:  install variant warning  |  
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 When installing a port, if the user specifies a variant which does not
 exist, a warning should appear. In debug mode, the usual "not provided"
 message is shown but its shown amongst the usual darwin and macosx variant
 warnings. Normal users who do not run in debug mode should be given a
 warning. This would help for people who want to install a port with a
 specific version of a variant (php4 versus php5 for example), but typo it
 and end up installing the wrong version. Since variants could be specified
 for the dependent ports themselves, perhaps a recursive check down all of
 the dependencies could be made before any fetching and warn is the variant
 is not found in any of the ports.

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Ticket URL: <http://trac.macosforge.org/projects/macports/ticket/14648>
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