[MacPorts] #53487: Request: `port provides <file>` should indicate whether or not it points to a macports port file

[MacPorts]

#53487: Request: `port provides <file>` should indicate whether or not it points to
a macports port file
-----------------------------+-------------------
 Reporter:  paxperscientiam  |      Owner:
     Type:  enhancement      |     Status:  new
 Priority:  Normal           |  Milestone:
Component:  base             |    Version:  2.4.0
 Keywords:                   |       Port:
-----------------------------+-------------------
 Hello,

 I've a straightforward feature request: the `port provides <file>` command
 should indicate whether or not a symlink file points to a file provided by
 a Macports port.

 EG:

 {{{
 $ ls -l  /opt/local/bin/ruby
 lrwxr-xr-x  1 root  wheel  22 May 24  2016 /opt/local/bin/ruby@ ->
 /opt/local/bin/ruby2.3
 $
 $ port provides /opt/local/bin/ruby
 /opt/local/bin/ruby is not provided by a MacPorts port.
 $
 $ port provides /opt/local/bin/ruby2.3
 /opt/local/bin/ruby2.3 is provided by: ruby23
 }}}

 To sum up, it would be better if port ascertained and indicated whether or
 not the symlink points to a file provided by a Macports port.

--
Ticket URL: <https://trac.macports.org/ticket/53487>
MacPorts <https://www.macports.org/>
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