Add git-based auto-update for Linux deployment

- install.sh now clones from git instead of copying files
- Service runs git pull on restart for automatic updates
- Support config.local.json for production settings (gitignored)
- kao.py prefers config.local.json when present

To update production: push changes, then 'sudo systemctl restart kao'

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

install.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 # Kao Installation Script
-# Installs to /opt/kao and sets up systemd service
+# Clones from git to /opt/kao and sets up systemd service
+# Updates automatically via git pull on service restart
 
 set -e
 
@@ -17,7 +18,6 @@ echo "  Kao Installer"
 echo "===================================="
 echo "Install directory: $INSTALL_DIR"
 echo "Running as user: $CURRENT_USER"
-echo "Source: $SCRIPT_DIR"
 echo ""
 
 # Check if running as root
@@ -40,34 +40,58 @@ if ! command -v python3 &> /dev/null; then
     exit 1
 fi
 
-# Check source files exist
-if [ ! -f "$SCRIPT_DIR/kao.py" ]; then
-    echo "Error: Source files not found in $SCRIPT_DIR"
-    echo "Run this script from the Kao repository directory"
+# Check for git
+if ! command -v git &> /dev/null; then
+    echo "Error: git not found"
+    echo "Install with: sudo apt install git"
     exit 1
 fi
 
-# Create install directory
-echo "[1/5] Creating install directory..."
-mkdir -p "$INSTALL_DIR"
-cp "$SCRIPT_DIR/aggregator.py" "$INSTALL_DIR/"
-cp "$SCRIPT_DIR/kao.py" "$INSTALL_DIR/"
-cp "$SCRIPT_DIR/index.html" "$INSTALL_DIR/"
-cp "$SCRIPT_DIR/config.json" "$INSTALL_DIR/"
-cp "$SCRIPT_DIR/requirements.txt" "$INSTALL_DIR/"
-cp -r "$SCRIPT_DIR/detectors" "$INSTALL_DIR/"
+# Get git remote URL from source repo
+if [ -d "$SCRIPT_DIR/.git" ]; then
+    REPO_URL=$(git -C "$SCRIPT_DIR" remote get-url origin 2>/dev/null || echo "")
+fi
 
-# Set ownership before venv creation
+if [ -z "$REPO_URL" ]; then
+    echo "Error: Could not detect git remote URL"
+    echo "Run this script from within the Kao git repository"
+    exit 1
+fi
+
+echo "Git remote: $REPO_URL"
+echo ""
+
+# Remove existing installation if present
+if [ -d "$INSTALL_DIR" ]; then
+    echo "[1/6] Removing existing installation..."
+    systemctl stop kao.service 2>/dev/null || true
+    rm -rf "$INSTALL_DIR"
+else
+    echo "[1/6] No existing installation found"
+fi
+
+# Clone repository (as root since /opt requires elevated permissions)
+echo "[2/6] Cloning repository..."
+git clone "$REPO_URL" "$INSTALL_DIR"
+
+# Set ownership to target user (so they can git pull, create venv, etc.)
 chown -R "$CURRENT_USER:$CURRENT_GROUP" "$INSTALL_DIR"
 
+# Create local config for production customization
+echo "[3/6] Creating local config..."
+if [ ! -f "$INSTALL_DIR/config.local.json" ]; then
+    cp "$INSTALL_DIR/config.json" "$INSTALL_DIR/config.local.json"
+    echo "Created config.local.json - edit this for production settings"
+fi
+
 # Create virtual environment as target user
-echo "[2/5] Creating virtual environment..."
+echo "[4/6] Creating virtual environment..."
 sudo -u "$CURRENT_USER" python3 -m venv "$INSTALL_DIR/venv"
 sudo -u "$CURRENT_USER" "$INSTALL_DIR/venv/bin/pip" install --upgrade pip -q
 sudo -u "$CURRENT_USER" "$INSTALL_DIR/venv/bin/pip" install -r "$INSTALL_DIR/requirements.txt" -q
 
-# Create systemd service
-echo "[3/5] Creating systemd service..."
+# Create systemd service with git pull on start
+echo "[5/6] Creating systemd service..."
 cat > "$SERVICE_FILE" << EOF
 [Unit]
 Description=Kao - System Status Monitor
@@ -78,6 +102,7 @@ Type=simple
 User=$CURRENT_USER
 Group=$CURRENT_GROUP
 WorkingDirectory=$INSTALL_DIR
+ExecStartPre=/usr/bin/git -C $INSTALL_DIR pull --ff-only
 ExecStart=$INSTALL_DIR/venv/bin/python $INSTALL_DIR/kao.py
 Restart=always
 RestartSec=5
@@ -87,12 +112,9 @@ WantedBy=multi-user.target
 EOF
 
 # Reload systemd and enable service
-echo "[4/5] Enabling service..."
+echo "[6/6] Enabling and starting service..."
 systemctl daemon-reload
 systemctl enable kao.service
-
-# Start service
-echo "[5/5] Starting Kao..."
 systemctl start kao.service
 
 echo ""
@@ -103,9 +125,11 @@ echo ""
 echo "Kao is now running at http://$(hostname -I | awk '{print $1}'):5100"
 echo ""
 echo "Commands:"
-echo "  sudo systemctl status kao    # Check status"
-echo "  sudo systemctl restart kao   # Restart"
-echo "  sudo systemctl stop kao      # Stop"
-echo "  sudo journalctl -u kao -f    # View logs"
+echo "  sudo systemctl status kao     # Check status"
+echo "  sudo systemctl restart kao    # Restart (auto-pulls latest code)"
+echo "  sudo systemctl stop kao       # Stop"
+echo "  sudo journalctl -u kao -f     # View logs"
+echo ""
+echo "Config: $INSTALL_DIR/config.local.json"
+echo "To update: push changes to git, then 'sudo systemctl restart kao'"
 echo ""
-echo "Config file: $INSTALL_DIR/config.json"