Implement clean_up_and_exit function

lib/core_lib.sh

@@ -16,7 +16,6 @@
 # limitations under the License.
 #######################################################################
 
-#export COMMAND_PATHS=true
 _COMPATIBILITY_MODE=true
 
 #######################################################################
@@ -206,3 +205,64 @@ print_log_message () {
 	# prepend timestamp to the log message
 	printf "%s %s\n" "$tstamp" "$log_message" >> "$log_file"
 }
+
+#######################################################################
+# Clean up and exit the script.
+#
+# Usage:
+#   $ clean_up_and_exit [-d DIR_TO_BE_DELETED] EXIT_CODE
+#
+# This script is compatible with Mac OS and GNU/Linux.
+#######################################################################
+
+clean_up_and_exit () {
+
+	local unwanted_dir
+	local exit_code
+
+	local opt
+	local OPTARG
+	local OPTIND
+	while getopts ":d:" opt; do
+		case $opt in
+			d)
+				unwanted_dir="$OPTARG"
+				;;
+			\?)
+				echo "ERROR: $FUNCNAME: Unrecognized option: -$OPTARG" >&2
+				return 2
+				;;
+			:)
+				echo "ERROR: $FUNCNAME: Option -$OPTARG requires an argument" >&2
+				return 2
+				;;
+		esac
+	done
+
+	# determine the exit code
+	shift $(( OPTIND - 1 ))
+	if [ $# -ne 1 ]; then
+		echo "ERROR: $FUNCNAME: wrong number of arguments: $# (1 required)" >&2
+		return 2
+	fi
+	exit_code="$1"
+	if [ ! "$exit_code" -gt 0 ] ; then
+		echo "ERROR: $FUNCNAME: illegal exit code: $exit_code" >&2
+		return 2
+	fi
+
+	if [ -n "$unwanted_dir" ]; then
+		if [ ! -d "$unwanted_dir" ]; then
+			echo "ERROR: $FUNCNAME: directory does not exist: $unwanted_dir" >&2
+			return 2
+		fi
+
+		# remove the unwanted directory (!)
+		/bin/rm -rf "$unwanted_dir"
+		if [ $? -ne 0 ]; then
+			echo "ERROR: $FUNCNAME failed to remove dir: $unwanted_dir" >&2
+		fi
+	fi
+
+	exit $exit_code
+}