Implement email_tunnel service and installation scripts for Proton Bridge integration

install_email_tunnel.sh

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+#!/usr/bin/env bash
+#
+# Installation script for email_tunnel systemd service
+#
+# This script will:
+# 1. Verify prerequisites
+# 2. Copy service file to systemd directory with correct paths/user
+# 3. Enable and start the service
+# 4. Show status and usage information
+
+set -euo pipefail
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m' # No Color
+
+# Get script directory
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+echo "======================================"
+echo "email_tunnel Service Installer"
+echo "======================================"
+echo ""
+
+# Check if running as root
+if [ "$EUID" -eq 0 ]; then
+    echo -e "${RED}Error: Do not run this script as root or with sudo${NC}"
+    echo "The script will request sudo privileges when needed."
+    exit 1
+fi
+
+# Verify required files exist
+echo "Checking required files..."
+REQUIRED_FILES=(
+    "$SCRIPT_DIR/email_tunnel.py"
+    "$SCRIPT_DIR/.env"
+    "$SCRIPT_DIR/email_tunnel.service"
+)
+
+for file in "${REQUIRED_FILES[@]}"; do
+    if [ ! -f "$file" ]; then
+        echo -e "${RED}Error: Required file not found: $file${NC}"
+        exit 1
+    fi
+done
+echo -e "${GREEN}✓ All required files found${NC}"
+echo ""
+
+# Check for required commands
+echo "Checking dependencies..."
+MISSING_DEPS=()
+for cmd in python3 systemctl; do
+    if ! command -v "$cmd" &> /dev/null; then
+        MISSING_DEPS+=("$cmd")
+    fi
+done
+
+if [ ${#MISSING_DEPS[@]} -gt 0 ]; then
+    echo -e "${RED}Error: Missing required dependencies: ${MISSING_DEPS[*]}${NC}"
+    echo "Please install them and try again."
+    exit 1
+fi
+echo -e "${GREEN}✓ All dependencies installed${NC}"
+echo ""
+
+# Verify .env file has required variables
+echo "Validating .env configuration..."
+REQUIRED_VARS=(IMAP_IP IMAP_PORT IMAP_USER IMAP_PASSWORD IMAP_FOLDER SMTP_PORT SMTP_IP)
+MISSING_ENV=()
+for var in "${REQUIRED_VARS[@]}"; do
+    if ! grep -q "^${var}=" "$SCRIPT_DIR/.env"; then
+        MISSING_ENV+=("$var")
+    fi
+done
+
+if [ ${#MISSING_ENV[@]} -gt 0 ]; then
+    echo -e "${YELLOW}Warning: .env may be missing: ${MISSING_ENV[*]}${NC}"
+    read -p "Continue anyway? (y/N) " -n 1 -r
+    echo ""
+    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+        exit 1
+    fi
+else
+    echo -e "${GREEN}✓ .env configuration looks good${NC}"
+fi
+echo ""
+
+# Test script syntax
+echo "Testing email_tunnel.py byte-compile..."
+if python3 -m py_compile "$SCRIPT_DIR/email_tunnel.py"; then
+    echo -e "${GREEN}✓ Byte-compile succeeded${NC}"
+else
+    echo -e "${RED}Error: Byte-compile failed${NC}"
+    exit 1
+fi
+echo ""
+
+# Check if service is already installed
+SERVICE_NAME="email_tunnel.service"
+if systemctl list-unit-files | grep -q "$SERVICE_NAME"; then
+    echo -e "${YELLOW}Warning: $SERVICE_NAME is already installed${NC}"
+    read -p "Reinstall? (y/N) " -n 1 -r
+    echo ""
+    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+        exit 0
+    fi
+    echo "Stopping existing service..."
+    sudo systemctl stop "$SERVICE_NAME" 2>/dev/null || true
+    sudo systemctl disable "$SERVICE_NAME" 2>/dev/null || true
+fi
+
+# Prepare service file with correct paths
+echo "Preparing service file..."
+TEMP_SERVICE=$(mktemp)
+sed "s|/opt/email-tunnel|$SCRIPT_DIR|g" "$SCRIPT_DIR/email_tunnel.service" > "$TEMP_SERVICE"
+
+# Update user/group in service file
+CURRENT_USER=$(whoami)
+CURRENT_GROUP=$(id -gn)
+sed -i "s|User=email-tunnel|User=$CURRENT_USER|g" "$TEMP_SERVICE"
+sed -i "s|Group=email-tunnel|Group=$CURRENT_GROUP|g" "$TEMP_SERVICE"
+
+# Install service file
+echo "Installing systemd service file..."
+sudo cp "$TEMP_SERVICE" /etc/systemd/system/$SERVICE_NAME
+rm "$TEMP_SERVICE"
+sudo chmod 644 /etc/systemd/system/$SERVICE_NAME
+echo -e "${GREEN}✓ Service file installed${NC}"
+echo ""
+
+# Reload systemd
+echo "Reloading systemd daemon..."
+sudo systemctl daemon-reload
+echo -e "${GREEN}✓ Systemd reloaded${NC}"
+echo ""
+
+# Enable and start service
+echo "Enabling and starting $SERVICE_NAME..."
+sudo systemctl enable "$SERVICE_NAME"
+sudo systemctl start "$SERVICE_NAME"
+echo -e "${GREEN}✓ Service enabled and started${NC}"
+echo ""
+
+# Show status
+echo "======================================"
+echo "Installation Complete!"
+echo "======================================"
+echo ""
+echo "Service Status:"
+sudo systemctl status "$SERVICE_NAME" --no-pager -l || true
+echo ""
+
+echo -e "${GREEN}email_tunnel is now running!${NC}"
+echo ""
+echo "Useful commands:"
+echo "  View status:        systemctl status $SERVICE_NAME"
+echo "  View logs:          ./logs_email_tunnel.sh -f"
+echo "  Restart service:    sudo systemctl restart $SERVICE_NAME"
+echo "  Stop service:       sudo systemctl stop $SERVICE_NAME"
+echo "  Uninstall:          ./uninstall_email_tunnel.sh"
+echo ""