#!/bin/bash

usage() {

   if [ -n "$1" ]; then
       echo 1>&2 "$1"
       echo
   fi
   cat 1>&2 <<HERE
Usage: $(basename "$0") in_directory_1 in_directory_1 out_directory

Merges an Intel Mac and PPC Mac build (in in_directory_1 and in_directory_2)
to make a Universal build.
HERE
   exit 1
}

if [ "$#" != "3" ] ; then
   usage
fi

   
in1=$(cd "$1" && pwd); shift
in2=$(cd "$1" && pwd); shift
out="$1"; shift

if [ -e "$out" ] ; then
  usage "Directory '$out' already exists ... please remove it first."
fi

# there are probably less cheesy ways of doing this, but copying the
# whole tree first makes sure all the intermediate dirs are created
# first
ditto -rsrc "$in1" "$out"

( cd "$in1" ; find . -type f -print ) | while read path; do
    if (lipo -info "$in1"/"$path" >/dev/null 2>&1); then
        if [ -e "$in2"/"$path" ] ; then
            lipo "$in1"/"$path" "$in2/$path" -create -output "$out"/"$path"
        fi
    fi
done

( cd "$in2";  find . -print ) | while read path; do
    if [ \! -e "$out"/"$path" ] ; then
      cp -RP "$in2"/"$path" "$out"/"$path"
    fi
done

echo "Need to hack version.py still!"