Expose program name to bash scripts

scripts/EDdA/extract-from-source.sh

@@ -4,7 +4,7 @@ source ${0%/*}/../lib.sh
 
 if [ "$#" != 2 ]
 then
-	die "${0##*/} SOURCE_DIRECTORY TARGET_DIRECTORY"
+	die "${PROG_NAME} SOURCE_DIRECTORY TARGET_DIRECTORY"
 else
 	SOURCE="${1}"
 	TARGET="${2}"

scripts/extract-from-source.sh

@@ -6,7 +6,7 @@ source ${BASE_DIR}/lib.sh
 
 if [ "$#" != 2 ]
 then
-	die "${0##*/} SOURCE_DIRECTORY TARGET_DIRECTORY"
+	die "${PROG_NAME} SOURCE_DIRECTORY TARGET_DIRECTORY"
 else
 	SOURCE="${1}"
 	TARGET="${2}"

scripts/lib.sh

@@ -2,3 +2,5 @@ function die() {
 	printf "${1}\n"
 	exit 1
 }
+
+PROG_NAME="${0##*/}"