Bulk patch script

epatch.sh

#!/bin/bash

## This code is proteced by Creative Commons Attribution-Share Alike 2.5 Generic licence
## Some rights reserved
##
## @author: Gabor Garami <hrgyster@gmail.com>
## @version: 0.2
## @since: 02/2010


PATCHLOG=/tmp/epatch.log
#PATCHLOG=/dev/null

function _epatch() {

	local PATCH=$1
	local DIR=$2
	local DIR=${DIR:-.}
	local OPTS="-N -E -g0 --no-backup-if-mismatch ${EPATCH_OPTS}"
	local SUFFIX="${PATCH##*.}"
	local count=0
	
	case $SUFFIX in
		bz2)
			FILTER="bzip2 -dc"
			;;
		lzma)
			FILTER="lzma -dc"
			;;
		gz)
			FILTER="gzip -dc"
			;;
		xz)
			FILTER="xz -dc"
			;;
		*)
			FILTER="cat"
			;;
	esac
	
	
	while [ "${count}" -lt 5 ]; do
		echo " --- Starting patch ${PATCH} " >> ${PATCHLOG}
		if  ${FILTER} ${PATCH} | patch -p${count} ${OPTS} --dry-run -f >> ${PATCHLOG} 2>&1 ; then
			if ${FILTER} ${PATCH} | patch -p${count} ${OPTS} -d ${DIR} >> ${PATCHLOG} 2>&1; then
				echo "!!! Found level ${count} !!!" >> ${PATCHLOG}
			else
				echo "A dry-run of patch command succeeded, but actually"
				echo "applying the patch failed!"
				count=5
			fi
			break
		fi
		count=$((count + 1))
	done
	
	if [ "${count}" -eq 5 ]
	then
	        echo
	        echo "Failed Patch: ${PATCH} !"
	        echo
		return 1
	fi

}

if [ "$1" = "-d" ]; then
	DIR=$2
	shift 2
fi

for patch in $*; do
	_epatch ${patch} ${DIR}
	if [ "$?" -ne "0" ]; then
		echo " --- Applying patch \"${patch}\" FAILED ---" | tee -a ${PATCHLOG}
	else
		echo " --- Applying patch \"${patch}\" succeeded ---" | tee -a ${PATCHLOG}
	fi
done