modernize multiple seqs and fix deprecated use of endCheckEmpty

seqs/nextcloud.sh

@@ -3,20 +3,12 @@
 # Dependency to other seqs
 # - mysql.sh (soft; Missing informational output) 
 
-toolName="nextcloud"
+readonly toolName="nextcloud"
 localOcc=("echo" "occ not found!")
-
-# Get script working directory
-# (when called from a different directory)
-sq_dir="$( cd "$( dirname -- "$(realpath "${BASH_SOURCE[0]}")")" >>/dev/null 2>&1 && pwd )"
 sq_config=0
-sq_configFileName="${toolName}.cfg"
-sq_configFileTemplate="$sq_dir/${sq_configFileName}.example"
 
 seq_config() {
-  ## or to use sequencer api:
-  initSeqConfig "$sq_configFileName" "$sq_configFileTemplate"
-  if [ $? -eq 0 ] ; then
+  if initSeqConfig "${seq_configName:?}" "${seq_configTemplate:?}" ; then
     sq_config=1
   fi
   localOcc=( sudo -u $sc_ncServerUser php "$(escpath "$sc_ncInstallDir/occ")" )
@@ -34,7 +26,7 @@ step_1() {
 step_20_info() { echo "Upgrade $toolName on command line to latest version of selected release channel"; }
 step_20_alias() { echo "upgrade"; }
 step_20() {
-  if [ $sq_config -eq 0 ] ; then
+  if (( ! sq_config )) ; then
     error -e "No configuration found to determine installation directory"
     return 1
   fi
@@ -64,9 +56,9 @@ step_102() {
 
   if [ -z $1 ] ; then
     error -e "No database provided"
-    if [ -f "${sq_dir}/mysql.sh" ] ; then
+    if [ -f "${seq_origin}/mysql.sh" ] ; then
       echo " [I] Available mysql databases:"
-      "${sq_dir}/mysql.sh" -qq listdb
+      "${seq_origin}/mysql.sh" -qq listdb
     fi
     return 1
   else
@@ -147,5 +139,7 @@ occ config:app:set preview jpeg_quality --value="60"
 NOTES_END
 }
 
+# shellcheck disable=SC2034 # Appears unused
 readonly sqr_minVersion=16
+# shellcheck disable=SC1091 # Don't follow this source
 . /usr/local/bin/sequencer.sh