New feature suggestion: print-gh-tuple: Print GH_TUPLE corresponding to submodules of a GitHub repository ${GH_ACCOUNT}/${GH_PROJECT}

[Yuri]

Hi,


I am suggesting a new feature: make print-gh-tuple


https://reviews.freebsd.org/D24231


It works when USE_GITHUB=yes is set.

When a GitHub repository has git submodules, that themselves can also 
have embedded submodules, it can traverse all of them and output the 
value of GH_TUPLE that would include all of them.

This is quite tedious and difficult to do manually.

It checks out the GitHub repository with submodules, traverses the list 
using a combination of shell and awk scripting, and prints GH_TUPLE that 
can be pasted into a ports's Makefile.


Yuri