#!/bin/sh

# If using normal root, avoid changing anything.
if [ -z "$RPM_BUILD_ROOT" -o "$RPM_BUILD_ROOT" = "/" ]; then
	exit 0
fi

# If zip is not installed, we can't repack the jars.
if [ ! -x /usr/bin/zip ]; then
	exit 0
fi
if [ ! -x /usr/bin/unzip ]; then
	exit 0
fi

JARS=`find $RPM_BUILD_ROOT -type f -name \*.jar`
if [ ! -z "$JARS" ]; then 
	
	# make $RPM_BUILD_ROOT/tmp if it doesn't exist
	rmtmp=0
	if [ ! -x "$RPM_BUILD_ROOT/tmp" ]; then
		mkdir -p $RPM_BUILD_ROOT/tmp
		rmtmp=1
	fi
	
	# unpack every jar, set the date of the files and directories and 
	# repack the jar
	for j in $JARS ; do
		JARNAME=`basename $j`
		TMPDIR=`mktemp -d -p $RPM_BUILD_ROOT/tmp $JARNAME.tmpdir.XXXXXXXXXX` || exit 1
		JARDIR=`mktemp -d -p $RPM_BUILD_ROOT/tmp $JARNAME.jardir.XXXXXXXXXX` || exit 1
		TIMEREF=`mktemp -p $RPM_BUILD_ROOT/tmp $JARNAME.timeref.XXXXXXXXXX` || exit 1
		
		pushd $TMPDIR > /dev/null
		/usr/bin/unzip -qq -o $j
		rm -f $j
		
		# Create the directories first.
		for d in `find -type d | LC_ALL=C sort`; do
            		mkdir -p $JARDIR/$d
        	done 

		# Get the modtime from the newest ChangeLog. If the project
		# doesn't have a ChangeLog, Jan 1, 1970 will be used.
		CHANGELOGS=`find $RPM_BUILD_DIR/$RPM_PACKAGE_NAME-$RPM_PACKAGE_VERSION -type f -name ChangeLog`
		DATE="1970-01-01 UTC"
		if [ ! -z "$CHANGELOGS" ]; then
			for c in $CHANGELOGS; do
				TMPDATE=`stat -c %y $c | cut -d " " -f 1-2`
				if [ `date --date="$TMPDATE" +%s` -gt `date --date="$DATE" +%s` ]; then
					DATE="$TMPDATE"
				fi
			done
		fi 

		# move the contents over to the a new directory in order and set
		# the times. 
		for f in `find -type f | LC_ALL=C sort`; do 
            		cp $f $JARDIR/$f
            		touch --date="$DATE" $JARDIR/$f
        	done
		popd > /dev/null

		# Set the times of the directories.
		touch --date="$DATE" `find $JARDIR -type d`

		# make the jar
		pushd $JARDIR > /dev/null
		find . -type f -print | LC_ALL=C sort | /usr/bin/zip -q -X -9 $j -@
		popd > /dev/null

		# Cleanup.
		rm -rf $TMPDIR
		rm -rf $JARDIR
		rm -f $TIMEREF
	done

	# remove $RPM_BUILD_ROOT/tmp if we created it
	if [ $rmtmp -eq 1 ]; then
		rm -rf $RPM_BUILD_ROOT/tmp
	fi
fi