Allow to manage max_attempts with argument (-a,-t)

With -a, --attempt, --attempts, -t or --tries.

cluster/apt.check.update.sh

@@ -29,7 +29,7 @@ readonly COLOR_DEBUG="${PURPLE}"
 usage() {                                                       # {{{
 
 	cat <<- EOF
-usage: $PROGNAME
+usage: $PROGNAME [-a|-d|-h|-t]
 
 Verify if any APT package upgrade is available and
 try to prepare the host by :
@@ -39,7 +39,15 @@ EXAMPLES :
     - Verify upgrade and prepare the current host
         ${PROGNAME}
 
+    - Prepare the current host (if pending upgrade) only after 6 runs
+      if sge_slots_used is under 75 % of total SGE slots.
+        ${PROGNAME} --attempts 6
+
 OPTIONS :
+    -a,--attempt,--attempts,-t,--tries INT_MAX_ATTEMPTS
+        Number of time this script must be run to disable the host
+        if sge_slots_used is under 75 % of total SGE slots.
+
     -d,--debug
         Enable debug messages.
 
@@ -61,12 +69,18 @@ debug_message() {                                               # {{{
 # }}}
 define_vars() {                                                 # {{{
 
-	## If sge_hostname wasn't defined
+	## If sge_hostname wasn't defined (environment variable,…)
 	if [ -z "${sge_hostname}" ]; then
 		## Use local host for sge_hostname
 		sge_hostname="$(hostname -f)"
 	fi
 
+	## If max_attempts wasn't defined
+	if [ -z "${max_attempts}" ]; then
+		## Allow maximum 3 attempts before disable a host
+		max_attempts="3"
+	fi
+
 	## Script used to disable SGE queue(s)
 	sge_disable_host_queue_script="${PROGDIR}/sge.disable.host.queue.sh"
 
@@ -248,11 +262,11 @@ main() {                                                        # {{{
 			&& exit 0
 		## }}}
 
-		## If pending upgrade since 3 attempts {{{
+		## If pending upgrade since max_attempts (default: 3) {{{
 		## APT package upgrade is available
 		### Create a temp file
 		### Disable SGE queue
-		is_pending_upgrade_more_than_attempts "3" \
+		is_pending_upgrade_more_than_attempts "${max_attempts}" \
 			&& touch "${APT_TMP_FILE}" && echo "APT upgrade is available." >> "${APT_TMP_FILE}" \
 			&& sh "${sge_disable_host_queue_script}" \
 			&& exit 0
@@ -278,7 +292,7 @@ main() {                                                        # {{{
 			&& exit 0
 		## }}}
 
-		## After all just add content to a temp file {{{
+		## After all just add content to a temp file (+1 attempt) {{{
 		touch "${APT_TMP_FILE}" && echo "APT upgrade is available." >> "${APT_TMP_FILE}" \
 			&& debug_message "main − Add content to temp file for pending upgrade(s)." \
 			&& exit 0
@@ -290,7 +304,7 @@ main() {                                                        # {{{
 # }}}
 
 # Manage arguments                                                # {{{
-# This code can't be in a function due to arguments
+# This code can't be in a function due to argument management
 
 if [ ! "${NBARGS}" -eq "0" ]; then
 
@@ -311,6 +325,12 @@ if [ ! "${NBARGS}" -eq "0" ]; then
 	while printf -- '%s' "${1}" | grep -q -E -- "^-+"; do
 
 	case "${1}" in
+		-a|--attempt|--attempts|-t|--tries )  ## Fix the maximum attempts
+			## Move to the next argument
+			shift
+			## Define max_attempts with this argument
+			max_attempts="${1}"
+			;;
 		-d|--debug )                          ## debug
 			DEBUG=0
 			;;