#!/bin/sh

set -e

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

test $Argc = 0 && usage

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

test -z $out && usage

setglobal package = $[basename $out]

setglobal 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