#!/bin/sh

set -e

proc usage {
	echo "Usage: -o file"
	exit 1
}

test $Argc = 0 && usage

while [ $# -gt 0 ]
{
	setvar flag = "$1"
	case (flag) {
	-o {
		test $Argc -eq 1 && usage
		setvar out = "$2"
		mkdir -p $(dirname $2)
		shift
	}
	* {
		echo "Unknown option $1"
		exit 1
	}
}
	shift
}

test -z $out && usage

setvar package = $(basename "$out")

setvar dir = ""/src""

# untar input
tar xf - -C $dir

shell {
    cd $dir
    opam config exec -- mirage configure -o $out -t unix
    opam config exec -- make depend
    opam config exec -- make
    mv $(readlink $out) $out
} > /src/logs 2>&1

cd $dir && tar -cf - $out

exit 0