get user's home

[Joshua Root]

On 2017-8-5 07:14 , db wrote:
> On 4 Aug 2017, at 22:58, Joshua Root <jmr at macports.org> wrote:
>> Suppose a port is built on the buildbot. The user is 'buildbot' and so the value of $user_home will be something like '/Users/buildbot'.
> 
> During testing I didn't thoroughly checked that env var there. I suppose, it could be deleted or set to nil and left to the user to set it himself. As I said, I wrote the port for me, and uploaded it for others to test, as I couldn't figure out a (better) way to set it in the startup item and didn't find documentation on how macports would handle this case.

I don't think there is a good way to do it if the user's home directory 
must be encoded into the plist. But I suspect that is not the case, and 
Rainer has mentioned a good alternative in the ticket.

- Josh