#!/bin/sh

usage()
{
	echo ""
	echo "Usage: $0 <whichApp> [-h | --help]"
	echo ""
	echo " -- Synchronize the modification date of a folder to match its latest madified content"
	echo " -- Special case, if it is an app bundle, in the case, where there is a Contents folder, its contnets are used instead to determine the date."
	echo " -- by alex - alex@farbflash.de"
	echo ""
	echo " -- first parameter => app bundle"
}

while [ "$1" != "" ]; do
    case $1 in
        -h | --help )           usage
                                exit
                                ;;
        * )                     bundlePath=$1
    esac
    shift
done

if [ -z "$bundlePath" ]
then
	echo "Please specify a path to a Folder or App bundle as first parameter"
	exit
fi

if [ -d "$bundlePath/Contents" ]
then
	absPathPath="$bundlePath/Contents"
else
	absPathPath="$bundlePath"
fi

newestItem=$(stat -f "%m%t%Sm%t%N" "$absPathPath"/* | sort -rn | head -1 | cut -f2-)
newestItemPath=$(echo "$newestItem" | cut -f2-)
newestItemDate=$(echo "$newestItem" | cut -f-1)

touch -r "$newestItemPath" "$bundlePath"

echo "Changed date to $newestItemDate"