Manage options outside of a function

cluster/maco.check.update.sh

@@ -12,7 +12,7 @@ readonly PROGNAME=$(basename "${0}")
 readonly PROGDIR=$(readlink -m $(dirname "${0}"))
 readonly ARGS="${*}"
 readonly NBARGS="${#}"
-[ -z "${DEBUG}" ] && readonly DEBUG=0
+[ -z "${DEBUG}" ] && DEBUG=1
 ## Export DEBUG for sub-script
 export DEBUG
 
@@ -27,21 +27,6 @@ readonly MACO_LOCAL_DIR="/opt/maco"
 readonly MACO_INSTALL_DIR="/mnt/store.ipr/InstallProgs/ipr/maco"
 # }}}
 
-manage_args() {                                                 # {{{
-
-	case "${NBARGS}" in
-		0 ) ## Nothing to do
-			;;
-		* )
-			printf '%b\n' "${RED}Don't expect any arguments.${RESET}"
-			printf '%b\n' "---"
-			usage
-			exit 1
-			;;
-	esac
-
-}
-# }}}
 usage() {                                                       # {{{
 
 	cat <<- EOF
@@ -123,8 +108,6 @@ Local Maco version (${CURRENT_MACO_VERSION}) is different from latest version ($
 # }}}
 main() {                                                        # {{{
 
-	manage_args "${ARGS}"
-
 	## Get all Maco's versions (date)
 	readonly CURRENT_MACO_VERSION=$(< "${MACO_LOCAL_DIR}/maco-version.txt" awk -v FS=. '{ print $1 "-" $2 "-" $3 "T" $4 ":" $5 ":" $6 }' \
 		|| exit 1)
@@ -149,6 +132,56 @@ main() {                                                        # {{{
 }
 # }}}
 
+# Manage arguments {{{
+# This code can't be in a function due to arguments
+
+if [ ! "${NBARGS}" -eq "0" ]; then
+
+	manage_arg="0"
+	# Parse all options (start with a "-") one by one
+	while printf -- '%s' "${1}" | grep -q -E -- "^-*"; do
+
+	case "${1}" in
+		-h|--help ) ## help
+			usage
+			## Exit after help informations
+			exit 0
+			;;
+		-d|--debug ) ## debug
+			DEBUG=0
+			## Re-export new DEBUG value
+			export DEBUG
+			;;
+		-- )         ## End of options list
+			## End the while loop
+			break
+			;;
+		* )
+			printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
+			printf '%b\n' "---"
+			usage
+			exit 1
+			;;
+	esac
+
+	debug_message "Arguments management − \
+${1} option managed."
+
+	## Next arg
+	shift
+	manage_arg=$((manage_arg+1))
+
+	done
+
+	debug_message "Arguments management − \
+${manage_arg} argument(s) successfully managed."
+else
+	debug_message "Arguments management − \
+No arguments/options to manage."
+fi
+
+# }}}
+
 main
 
 exit 255