From a4c49e9f859bf41db83f01f4748361b19f9905f2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gardais=20J=C3=A9r=C3=A9my?=
 <jeremy.gardais@univ-rennes1.fr>
Date: Mon, 11 Jul 2022 11:34:47 +0200
Subject: [PATCH] Accept options

---
 cluster/apt.apply.update.sh | 115 ++++++++++++++++++++++++++++--------
 1 file changed, 89 insertions(+), 26 deletions(-)

diff --git a/cluster/apt.apply.update.sh b/cluster/apt.apply.update.sh
index 49f93bf..3eabdbe 100755
--- a/cluster/apt.apply.update.sh
+++ b/cluster/apt.apply.update.sh
@@ -12,7 +12,7 @@ readonly PROGNAME=$(basename "${0}")
 readonly PROGDIR=$(readlink -m $(dirname "${0}"))
 readonly ARGS="${*}"
 readonly NBARGS="${#}"
-[ -z "${DEBUG}" ] && readonly DEBUG=1
+[ -z "${DEBUG}" ] && DEBUG=1
 ## Export DEBUG for sub-script
 export DEBUG
 
@@ -26,25 +26,10 @@ readonly RESET='\033[0m'
 readonly COLOR_DEBUG="${PURPLE}"
 # }}}
 
-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
-usage: $PROGNAME
+usage: $PROGNAME [-d|-h]
 
 Apply any APT package upgrade if the host is free:
 	* All SGE queues are disable
@@ -54,6 +39,13 @@ Apply any APT package upgrade if the host is free:
 EXAMPLES:
     - Apply upgrade on the current host
         ${PROGNAME}
+
+OPTIONS :
+    -d,--debug
+        Enable debug messages.
+
+    -h,--help
+        Print this help message.
 	EOF
 
 }
@@ -68,6 +60,28 @@ debug_message() {                                               # {{{
 	return 0
 }
 # }}}
+define_vars() {                                                 # {{{
+
+	## 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 sge_queues_name wasn't defined (environment variable,…) {{{
+	if [ -z "${sge_queues_name}" ]; then
+		## Get queues from qhost
+		sge_queues_name="$(qhost -h "${sge_hostname:=/dev/null}" -q -xml \
+			| grep "queue name" \
+			| cut -d"'" -f2 )"
+	fi
+	## }}}
+
+	## Process pattern to monitor
+	maco_proc_pattern="(/opt/maco/bin/maco.autoupdate.sh)"
+}
+# }}}
 is_sge_host() {                                                 # {{{
 
 	## Check if SGE commands (qconf) are available
@@ -318,15 +332,8 @@ main() {                                                        # {{{
 		|| exit 0
 	## }}}
 
-	manage_args "${ARGS}"
-
-	## Define vars
-	sge_hostname="$(hostname -f)"
-	sge_queues_name="$(qhost -h "${sge_hostname:=/dev/null}" -q -xml \
-		| grep "queue name" \
-		| cut -d"'" -f2 )"
-
-	maco_proc_pattern="(/opt/maco/bin/maco.autoupdate.sh)"
+	## Define all vars
+	define_vars
 
 	## If NO APT package upgrade is available
 	### Exit
@@ -365,6 +372,62 @@ main() {                                                        # {{{
 }
 # }}}
 
+# Manage arguments                                                # {{{
+# This code can't be in a function due to argument management
+
+if [ ! "${NBARGS}" -eq "0" ]; then
+
+	manage_arg="0"
+
+	## If the first argument is not an option
+	if ! printf -- '%s' "${1}" | grep -q -E -- "^-+";
+	then
+		## Print help message and exit
+		printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
+		printf '%b\n' "---"
+		usage
+
+		exit 1
+	fi
+
+	# Parse all options (start with a "-") one by one
+	while printf -- '%s' "${1}" | grep -q -E -- "^-+"; do
+
+	case "${1}" in
+		-d|--debug )                          ## debug
+			DEBUG=0
+			;;
+		-h|--help )                           ## help
+			usage
+			## Exit after help informations
+			exit 0
+			;;
+		* )                                   ## unknow option
+			printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
+			printf '%b\n' "---"
+			usage
+			exit 1
+			;;
+	esac
+
+	debug_message "Arguments management − \
+${RED}${1}${COLOR_DEBUG} option managed."
+
+	## Move to the next argument
+	shift
+	manage_arg=$((manage_arg+1))
+
+	done
+
+	debug_message "Arguments management − \
+${RED}${manage_arg}${COLOR_DEBUG} argument(s) successfully managed."
+else
+	debug_message "Arguments management − \
+No arguments/options to manage."
+fi
+
+# }}}
+
 main
 
 exit 255