redhat-rpm-config/brp-java-repack-jars

#!/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 $RPM_BUILD_ROOT -type f -name \*.jar -not -size 0`
if [ ! -z "$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
	OLD_IFS="$IFS"
	IFS=$(printf '\n\t')
	for j in $JARS ; do
		JARNAME=`basename "$j"`
		JTMPDIR=`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 "$JTMPDIR" > /dev/null
		/usr/bin/unzip -qq -o "$j"
		find -type d -exec chmod a+rx {} \;
		find -type f -exec chmod a+r {} \;
		rm -f "$j"
		
		# Create the directories first.
		find -type d | LC_ALL=C sort | while read d; 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.
		DATE="1970-01-01 UTC"

		if [ -z $_PACKAGE_BUILD_DIR ]; then
			_PACKAGE_BUILD_DIR=$RPM_BUILD_DIR/$RPM_PACKAGE_NAME-$RPM_PACKAGE_VERSION
		fi

		if [ -d $_PACKAGE_BUILD_DIR ]; then
			CHANGELOGS=`find $_PACKAGE_BUILD_DIR -type f -name ChangeLog`
			if [ ! -z "$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 
		fi

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

		# Set the times of the directories.
		find "$JARDIR" -type d | while read d; do
			touch --date="$DATE" "$d"
		done

		# make the jar
		pushd "$JARDIR" > /dev/null

		if [ -n "`find -not -name '.'`" ]; then
			if [ -e META-INF/MANIFEST.MF ]; then
			    /usr/bin/zip -q -X -9 "$j" META-INF/MANIFEST.MF
			fi
			find * -not -name '.' | LC_ALL=C sort | /usr/bin/zip -u -q -X -9 "$j" -@
		else
			# Put the empty jar back
			touch "$j"
		fi
		popd > /dev/null

		# Cleanup.
		rm -rf "$JTMPDIR"
		rm -rf "$JARDIR"
		rm -f "$TIMEREF"
	done
	IFS="$OLD_IFS"

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