Parse Package.swift files to obtain apt-get dependencies.

[rolivieri]

Parse Package.swift files to obtain apt-get dependencies.

[BDHernand]

Was looking at this. To do this in package builder we would need to alter the build-package.sh file
and before we invoke the makefile we would need to do the following:

swift package fetch

This will get all the dependencies and put them in the Packages directory. Next based upon OS we would need to issue the following commands:

Linux:

egrep -R "Apt *\(" Packages/*/Package.swift | sed -e 's/^.*\.Apt *( *" *//' -e 's/".*$//' | sort | uniq

Mac:

egrep -R "Brew *\(" Packages/*/Package.swift | sed -e 's/^.*\.Brew *( *" *//' -e 's/".*$//' | sort | uniq

the sort and uniq portions of the commands were to make sure we don't have duplicates in the list and to order it.

We would probable also want to run those commands on the main Package.swift file of the repo to make sure that it is taken care of as well and add that to the existing list if any.

That new list would need to be sorted and uniqued and passed into either apt-get or brew install commands to get those dependencies installed. Then once that is done we can run the make file portion of package-builder.... that should about cover it.