feat: save multi instance klipper names/identifier to kiauh.ini

Signed-off-by: Dominik Willner <th33xitus@gmail.com>

scripts/utilities.sh

@@ -138,6 +138,7 @@ function init_ini() {
       echo -e "#             DO NOT edit this file!              #"
       echo -e "#=================================================#"
       echo -e "# KIAUH v4.0.0"
+      echo -e "#"
     } >> "${INI_FILE}"
   fi
 
@@ -175,7 +176,20 @@ function init_ini() {
     echo -e "\nfluidd_install_unstable=false\c" >> "${INI_FILE}"
   fi
 
+  if ! grep -Eq "^multi_instance_names=" "${INI_FILE}"; then
+    echo -e "\nmulti_instance_names=\c" >> "${INI_FILE}"
+  else
+    sed -i "/multi_instance_names=/s/=.*/=/" "${INI_FILE}"
+  fi
+
+  ### save all installed webinterface ports to the ini file
   fetch_webui_ports
+
+  ### save all klipper multi-instance names to the ini file
+  fetch_multi_instance_names
+
+  ### strip all empty lines out of the file
+  sed -i "/^[[:blank:]]*$/ d" "${INI_FILE}"
 }
 
 function change_klipper_cfg_folder() {
@@ -669,3 +683,54 @@ function get_instance_name() {
   name=$(echo "${instance}" | rev | cut -d"/" -f1 | rev | cut -d"-" -f2 | cut -d"." -f1)
   echo "${name}"
 }
+
+###
+# returns the instance name/identifier of the klipper service
+# if the klipper service is part of a multi instance setup
+# otherwise returns an emtpy string
+#
+# @param {string}: name - klipper service name (e.g. klipper-name.service)
+#
+function get_klipper_instance_name() {
+  local instance=${1}
+  local name
+
+  name=$(echo "${instance}" | rev | cut -d"/" -f1 | cut -d"." -f2 | rev)
+
+  local regex="^klipper-[0-9a-zA-Z]+$"
+  if [[ ${name} =~ ${regex} ]]; then
+    name=$(echo "${name}" | cut -d"-" -f2)
+  else
+    name=""
+  fi
+
+  echo "${name}"
+}
+
+###
+# combines and saves each instance name/identifier
+# to the kiauh.ini file in a comma separated format
+#
+function add_to_multi_instance_names() {
+  read_kiauh_ini "${FUNCNAME[0]}"
+
+  local name="${1}"
+  local names="${multi_instance_names}"
+
+  if ! grep -Eq "${name}" <<< "${names}"; then
+    names="${names}${name},"
+    sed -i "/multi_instance_names=/s/=.*/=${names}/" "${INI_FILE}"
+  fi
+}
+
+###
+# loops through all installed klipper services and
+# calls the 'add_to_multi_instance_names' on each one
+#
+function fetch_multi_instance_names() {
+  for service in $(klipper_systemd); do
+    local name
+    name=$(get_klipper_instance_name "${service}")
+    add_to_multi_instance_names "${name}"
+  done
+}