added the ability to make a partial update of a machine

This is very useful to do quick tests while debugging as the the partial updates can be much faster than a full update.

work related to [https://bugzilla.ipr.univ-rennes.fr/show_bug.cgi?id=3814]

home/bin/deboco

@@ -471,10 +471,12 @@ deboco__init_machine()
 	return "$error_code"
 }
 
-deboco__update_machine()
+common_update_machine()
 {
 	local debops_controller_path="$1"
 	local target_host_fqdn="$2"  # eg alambix-108.ipr.univ-rennes.fr
+	local only_role="$3"  # eg "role::xymon_server" or "role::rsyslog" or "" if all roles need to be applied
+	local machine_group="$4"  # eg 'site' or 'service/apache2'
 	debops_controller_path=$(realpath $debops_controller_path)
 	log 'info' "updating $target_host_fqdn using debobs controller $debops_controller_path"
 
@@ -507,9 +509,14 @@ deboco__update_machine()
 		ANS_HOST=$(echo ${target_host_fqdn} | sed -E 's/\.univ-rennes[1]?\.fr$//')
 		log 'debug' "ANS_HOST=${ANS_HOST}"
 		# example to apply just the role rsyslog:
-		# debops run site --limit "${ANS_HOST:-/dev/null}" -t "role::rsyslog" | tee --append ${report_file_path}
+		if [ "$only_role" != '' ]
-		debops run site --limit "${ANS_HOST:-/dev/null}" | tee --append ${report_file_path}
+		then
-		debops_exit_code=$?
+			debops run "${machine_group}" --limit "${ANS_HOST:-/dev/null}" -t "${only_role}" | tee --append ${report_file_path}
+			debops_exit_code=$?
+		else
+			debops run "${machine_group}" --limit "${ANS_HOST:-/dev/null}" | tee --append ${report_file_path}
+			debops_exit_code=$?
+		fi
 		echo "return code for debops run site --limit ${ANS_HOST:-/dev/null} : $debops_exit_code" >> "${report_file_path}"
 		if [ "$debops_exit_code" != "$RETURNCODE_SUCCESS" ]
 		then
@@ -524,6 +531,31 @@ deboco__update_machine()
 	return "$error_code"
 }
 
+deboco__update_machine()
+{
+	local debops_controller_path="$1"
+	local target_host_fqdn="$2"  # eg alambix-108.ipr.univ-rennes.fr
+	local only_role=""
+	local machine_group="site"
+	common_update_machine "$debops_controller_path" "$target_host_fqdn" "$only_role" "$machine_group"
+}
+
+deboco__update_machine_partially()
+{
+	local debops_controller_path="$1"
+	local target_host_fqdn="$2"  # eg alambix-108.ipr.univ-rennes.fr
+	local only_role="$3"  # eg "role::xymon_server" or "role::rsyslog" or "" if all roles need to be applied
+	local service="$4"  # eg "nginx" "apache2"
+	local machine_group=''
+	if [ "$service" = "" ]
+	then
+		machine_group='site'
+	else
+		machine_group="service/$service"
+	fi
+	common_update_machine "$debops_controller_path" "$target_host_fqdn" "$only_role" "$machine_group"
+}
+
 deboco_print_usage()
 {
 	echo "$0 performs a debops controller operation"
@@ -549,11 +581,17 @@ deboco_print_usage()
 	echo "     update_machine <debobs-controller-path> <machine-fqdn>"
 	echo "        updates the machine <machine-fqdn> using the debops controller in <debobs-controller-path>"
 	echo 
+	echo "     update_machine_partially <debobs-controller-path> <machine-fqdn> <role> <service>"
+	echo "        updates the role <role> on machine <machine-fqdn> belonging to service <service> using the debops controller in <debobs-controller-path>"
+	echo 
 	echo "     configure_machine <debobs-controller-path> <machine-fqdn>"
 	echo "        configures the machine <machine-fqdn> using the debops controller in <debobs-controller-path>". Equivalent to a init_machine followed by update_machine
 	echo 
-	echo "example:"
+	echo "examples:"
 	echo "     deboco --python-path /usr/bin/python3.10 init ~/work/debops/controllers/alambix"
+	echo 
+	echo "example to update xymon server's configuration (here it's much faster to specify the service apache than an unspecified service: 16s instead of 3m 33s):"
+	echo "     deboco update_machine_partially ~/debops/controllers/alambix monitoring.ipr.univ-rennes.fr role::xymon_server apache"
 }
 
 deboco()