MacPorts missing links

[Ryan Schmidt]

> On Sep 11, 2016, at 5:33 PM, Lawrence Velázquez <larryv at macports.org> wrote:
> 
>> On Sep 11, 2016, at 6:29 PM, Ryan Schmidt <ryandesign at macports.org> wrote:
>> 
>>> On Sep 11, 2016, at 5:24 PM, Brandon Allbery wrote:
>>>> On Sun, Sep 11, 2016 at 6:22 PM, Ryan Schmidt wrote:
>>>> 
>>>> On my system I see the contents of that directory are provided by the following ports:
>>> 
>>> I think they're complaining that the directory itself should have been cleaned up. We don't have the concept of files/directories shared between ports, so it just doesn't get listed and therefore doesn't get cleaned up.
>> 
>> MacPorts does delete empty directories whenever a port is deactivated...
> 
> But not all the files in the etc/select tree come from ports.
> 
> 	% port provides /opt/local/etc/select/**/current
> 	/opt/local/etc/select/gcc/current is not provided by a MacPorts port.
> 	/opt/local/etc/select/python/current is not provided by a MacPorts port.
> 	/opt/local/etc/select/python2/current is not provided by a MacPorts port.
> 	/opt/local/etc/select/python3/current is not provided by a MacPorts port.
> 	/opt/local/etc/select/virtualenv/current is not provided by a MacPorts port.
> 
> This is cut from the same cloth as the symlink issue: The selection mechanism is implemented half in base and half in ports, and there's something of an impedance mismatch.

Gotcha, so if you did not have something selected by that group, MacPorts would have removed the directory when the last port providing the select group was deactivated, but because something was selected, its "current" file prevented the deactivate phase from deleting the directory. So we should also fix "port select" to remove empty directories when removing the "current" symlink.