Standardize exit codes in exporter addons

Unify exit codes across exporter addon scripts: return 238 for unsupported OS detections and 233 when an update is requested but the exporter is not installed. Applied to nextcloud-exporter.sh, pihole-exporter.sh, prometheus-paperless-ngx-exporter.sh, and qbittorrent-exporter.sh to make failure modes distinguishable for callers/automation.

tools/addon/nextcloud-exporter.sh

@@ -36,7 +36,7 @@ SERVICE_PATH="/etc/systemd/system/nextcloud-exporter.service"
 # ==============================================================================
 if ! grep -qE 'ID=debian|ID=ubuntu' /etc/os-release 2>/dev/null; then
   echo -e "${CROSS} Unsupported OS detected. This script only supports Debian and Ubuntu."
-  exit 1
+  exit 238
 fi
 
 # ==============================================================================
@@ -170,7 +170,7 @@ if [[ "${type:-}" == "update" ]]; then
     update
   else
     msg_error "Nextcloud-Exporter is not installed. Nothing to update."
-    exit 1
+    exit 233
   fi
   exit 0
 fi

tools/addon/pihole-exporter.sh

@@ -41,7 +41,7 @@ elif grep -qE 'ID=debian|ID=ubuntu' /etc/os-release; then
   SERVICE_PATH="/etc/systemd/system/pihole-exporter.service"
 else
   echo -e "${CROSS} Unsupported OS detected. Exiting."
-  exit 1
+  exit 238
 fi
 
 # ==============================================================================
@@ -207,7 +207,7 @@ if [[ "${type:-}" == "update" ]]; then
     update
   else
     msg_error "Pihole-Exporter is not installed. Nothing to update."
-    exit 1
+    exit 233
   fi
   exit 0
 fi

tools/addon/prometheus-paperless-ngx-exporter.sh

@@ -32,7 +32,7 @@ AUTH_TOKEN_FILE="/etc/prometheus-paperless-ngx-exporter/paperless_auth_token_fil
 # ==============================================================================
 if ! grep -qE 'ID=debian|ID=ubuntu' /etc/os-release 2>/dev/null; then
   echo -e "${CROSS} Unsupported OS detected. This script only supports Debian and Ubuntu."
-  exit 1
+  exit 238
 fi
 
 # ==============================================================================
@@ -144,7 +144,7 @@ if [[ "${type:-}" == "update" ]]; then
     update
   else
     msg_error "Prometheus-Paperless-NGX-Exporter is not installed. Nothing to update."
-    exit 1
+    exit 233
   fi
   exit 0
 fi

tools/addon/qbittorrent-exporter.sh

@@ -41,7 +41,7 @@ elif grep -qE 'ID=debian|ID=ubuntu' /etc/os-release; then
   SERVICE_PATH="/etc/systemd/system/qbittorrent-exporter.service"
 else
   echo -e "${CROSS} Unsupported OS detected. Exiting."
-  exit 1
+  exit 238
 fi
 
 # ==============================================================================
@@ -200,7 +200,7 @@ if [[ "${type:-}" == "update" ]]; then
     update
   else
     msg_error "qBittorrent-Exporter is not installed. Nothing to update."
-    exit 1
+    exit 233
   fi
   exit 0
 fi