[MacPorts] #25182: pseudo-portname "leaves" should show build dependencies

[MacPorts]

#25182: pseudo-portname "leaves" should show build dependencies
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 Reporter:  swebster@…               |       Owner:  macports-tickets@…                   
     Type:  defect                   |      Status:  new                                  
 Priority:  Normal                   |   Milestone:                                       
Component:  base                     |     Version:  1.9.0                                
 Keywords:                           |        Port:                                       
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 It seems to me that a primary purpose of the pseudo-portname "leaves" is
 to enable users to find ports that they no longer require so that they can
 be removed from their system.  These ports could come into existence in a
 variety of ways, such as a requested port changing its dependencies.

 Unfortunately the command "port list leaves" shows ports which are build
 dependencies of other installed ports.  If these dependencies are removed
 then when those ports are next updated the build-deps will have to be
 reinstalled, wasting time and resources.  Ideally "port list leaves" would
 separately identify build dependencies in its output.

 This ticket is an outgrowth of #25179; sorry if this new ticket is
 inappropriate.  I almost marked it as "enhancement" but per the guidelines
 it seems to me that this is a feature that is not working as intended.
 Feel free to switch the type.

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Ticket URL: <http://trac.macports.org/ticket/25182>
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