Add message on stdout and quiet mode

cluster/sge.enable.host.queue.sh

@@ -8,6 +8,9 @@ readonly NBARGS="${#}"
 ## Test if DEBUG is already defined (by parent script,…)
 [ -z "${DEBUG}" ] && DEBUG=1
 
+# If output message should be displayed
+[ -z "${OUTPUT_MESSAGE}" ] && OUTPUT_MESSAGE=0
+
 # Maco temp file
 readonly MACO_TMP_FILE="/tmp/.maco.upgrade"
 readonly MACO_TMP_URGENT_FILE="/tmp/.maco.urgent.upgrade"
@@ -28,10 +31,11 @@ readonly COLOR_DEBUG="${PURPLE}"
 usage() {                                                       # {{{
 
 	cat <<- EOF
-usage: $PROGNAME [--help|-d,--debug] [hostname]
+usage: $PROGNAME [--help|-d,--debug|-q,--quiet] [hostname]
 
-Try to enable all SGE queues of the current host (default)
+Try to enable all SGE queues of the current host (default),
-or the one passed as first argument.
+if no pending upgrades (Maco, APT) are present,
+or to the one passed as first argument (no upgrades checking).
 
 EXAMPLES :
     - Enable SGE's queue(s) of the current host
@@ -39,6 +43,17 @@ EXAMPLES :
 
     - Enable SGE's queue(s) of "marvin.domain.tld" host
         ${PROGNAME} marvin.domain.tld
+
+OPTIONS :
+    --help
+        Print this help message.
+
+    -d,--debug
+        Enable debug messages.
+
+    -q,--quiet
+        Disable messages on standard output (except for error).
+
 	EOF
 
 }
@@ -50,6 +65,17 @@ debug_message() {                                               # {{{
 	## Print message if DEBUG is enable (=0)
 	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6b\e[m\n' "DEBUG − ${PROGNAME} : ${local_debug_message}"
 
+}
+# }}}
+message() {                                                     # {{{
+
+	local_message="${1}"
+
+	## Print message if OUTPUT_MESSAGE is enable (=0)
+	[ "${OUTPUT_MESSAGE}" -eq "0" ] && printf '%b\n' "${local_message}"
+
+	return 0
+
 }
 # }}}
 is_apt_upgrade_present() {                                      # {{{
@@ -208,7 +234,7 @@ Try to enable SGE queue: ${RED}${local_sge_queue_name:=/dev/null}@${local_sge_ho
 		qmod --enable "${local_sge_queue_name}@${local_sge_hostname}" \
 			&& return_enable_queue="${?}"
 	else
-		debug_message "SGE queue: ${RED}${local_sge_queue_name:=/dev/null}@${local_sge_hostname:=/dev/null}${RESET} was manually disabled, please re-enable it ${RED}manually${RESET}."
+		message "SGE queue: ${RED}${local_sge_queue_name:=/dev/null}@${local_sge_hostname:=/dev/null}${RESET} was manually disabled, please re-enable it ${RED}manually${RESET}."
 		return_enable_queue="1"
 	fi
 
@@ -302,8 +328,10 @@ if [ ! "${NBARGS}" -eq "0" ]; then
 			;;
 		-d|--debug )    ## debug
 			DEBUG=0
-			## Re-export new DEBUG value
+			;;
-			export DEBUG
+		-q|--quiet )    ## Silent mode
+			## Avoid to display any message on standard output
+			OUTPUT_MESSAGE=1
 			;;
 		-- )            ## End of options list
 			## End the while loop