[MacPorts] #17182: Variables aren't expanded in path:-style dependencies

[MacPorts]

#17182: Variables aren't expanded in path:-style dependencies
-------------------------------------+--------------------------------------
 Reporter:  ryandesign at macports.org  |       Owner:  macports-tickets at lists.macosforge.org
     Type:  defect                   |      Status:  new                                  
 Priority:  Normal                   |   Milestone:  MacPorts base bugs                   
Component:  base                     |     Version:  1.6.0                                
 Keywords:                           |        Port:                                       
-------------------------------------+--------------------------------------
 path:-style dependencies don't work as documented. The
 [http://guide.macports.org/#reference.dependencies.types documentation
 shows] this example:

 {{{
 depends_run         path:${prefix}/lib/libltdl.a:libtool
 }}}

 It turns out MacPorts doesn't actually expand variables here, so this
 doesn't work as intended.

 Furthermore, it turns out MacPorts actually prepends "`${prefix}/`" if the
 given path does not begin with a slash.

 So,

 1)  the Guide should show and recommend this simpler way to specify a
 dependency if it is in `${prefix}`:

 {{{
 depends_run         path:lib/libltdl.a:libtool
 }}}

 And it could show a different example using variable expansion in the
 path, if the path is not in `${prefix}` (a file in `${frameworks_dir}`
 perhaps)

 2) MacPorts base should be fixed to expand variables so this works as
 advertised

 Ports that define dependencies using "`path:${prefix}/...`" should use
 "`path:...`" instead since this is shorter, simpler, and actually works
 with MacPorts 1.6.0.

-- 
Ticket URL: <http://trac.macports.org/ticket/17182>
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