Add high-reliability 30s auto-sync configuration (Systemd Timer)

auto-sync-robust.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+
+# Configuration
+APP_NAME="web-page-performance-test"
+APP_DIR="/var/www/$APP_NAME"
+LOG_FILE="/var/log/$APP_NAME-autosync.log"
+LOCK_FILE="/var/lock/$APP_NAME-sync.lock"
+
+# Singleton execution with flock
+exec 9>"$LOCK_FILE"
+if ! flock -n 9; then
+    # Lock is busy, skip this run (logging optional to avoid spam)
+    exit 0
+fi
+
+log() {
+    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> "$LOG_FILE"
+}
+
+# Ensure we are in the correct directory
+cd "$APP_DIR" || { log "❌ Error: Could not change to $APP_DIR"; exit 1; }
+
+# Fetch remote updates
+if ! git fetch origin main --quiet; then
+    log "❌ Error: Git fetch failed"
+    exit 1
+fi
+
+LOCAL=$(git rev-parse HEAD)
+REMOTE=$(git rev-parse origin/main)
+
+if [ "$LOCAL" = "$REMOTE" ]; then
+    # No changes, exit silently
+    exit 0
+fi
+
+log "🔄 Changes detected! Local: ${LOCAL:0:7} -> Remote: ${REMOTE:0:7}"
+
+# Pull changes
+if ! git pull origin main; then
+    log "❌ Error: Git pull failed"
+    exit 1
+fi
+
+# Check for dependency changes
+RESTART_NEEDED=false
+if git diff --name-only "$LOCAL" "$REMOTE" | grep -q "package.json"; then
+    log "📦 package.json changed. Running npm install..."
+    if npm install --production; then
+        RESTART_NEEDED=true
+    else
+        log "❌ Error: npm install failed"
+    fi
+else
+    RESTART_NEEDED=true
+fi
+
+# Restart service if needed
+if [ "$RESTART_NEEDED" = true ]; then
+    log "🔄 Restarting service..."
+    if systemctl restart "$APP_NAME"; then
+        log "✅ Service restarted successfully"
+    else
+        log "❌ Error: Failed to restart service"
+    fi
+fi