Implement email_tunnel service and installation scripts for Proton Bridge integration

logs_email_tunnel.sh

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+#!/usr/bin/env bash
+#
+# Log viewer for email_tunnel systemd service
+
+set -euo pipefail
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+SERVICE_NAME="email_tunnel.service"
+
+# Check if systemctl is available
+if ! command -v systemctl &> /dev/null; then
+    echo -e "${RED}Error: systemctl not found${NC}"
+    echo "This script requires systemd."
+    exit 1
+fi
+
+# Check if journalctl is available
+if ! command -v journalctl &> /dev/null; then
+    echo -e "${RED}Error: journalctl not found${NC}"
+    echo "This script requires journalctl."
+    exit 1
+fi
+
+# Function to show help
+show_help() {
+    cat << EOF
+${GREEN}email_tunnel Log Viewer${NC}
+
+Usage: $0 [OPTION]
+
+Options:
+  -f, --follow          Follow logs in real-time (like tail -f)
+  -n, --lines NUMBER    Show last N lines (default: 50)
+  -t, --today           Show logs from today only
+  -h, --hour            Show logs from the last hour
+  -b, --boot            Show logs since last boot
+  -a, --all             Show all logs (no limit)
+  -s, --status          Show service status
+  -e, --errors          Show only error messages
+  -v, --verbose         Show verbose output (all log levels)
+  --help                Show this help message
+
+Examples:
+  $0                    Show last 50 log lines
+  $0 -f                 Follow logs in real-time
+  $0 -n 100             Show last 100 lines
+  $0 -t                 Show today's logs
+  $0 -e                 Show only errors
+  $0 -s                 Show service status
+
+EOF
+}
+
+# Function to show status
+show_status() {
+    echo -e "${BLUE}=== Service Status ===${NC}"
+    systemctl status "$SERVICE_NAME" --no-pager -l || true
+    echo ""
+    echo -e "${BLUE}=== Recent Runs ===${NC}"
+    journalctl -u "$SERVICE_NAME" -n 5 --no-pager -o short-precise
+}
+
+# Parse command line arguments
+FOLLOW=false
+LINES=50
+SINCE=""
+PRIORITY=""
+SHOW_ALL=false
+SHOW_STATUS=false
+
+if [ $# -eq 0 ]; then
+    :
+else
+    while [[ $# -gt 0 ]]; do
+        case $1 in
+            -f|--follow)
+                FOLLOW=true
+                shift
+                ;;
+            -n|--lines)
+                LINES="$2"
+                shift 2
+                ;;
+            -t|--today)
+                SINCE="today"
+                shift
+                ;;
+            -h|--hour)
+                SINCE="1 hour ago"
+                shift
+                ;;
+            -b|--boot)
+                SINCE="boot"
+                shift
+                ;;
+            -a|--all)
+                SHOW_ALL=true
+                shift
+                ;;
+            -s|--status)
+                SHOW_STATUS=true
+                shift
+                ;;
+            -e|--errors)
+                PRIORITY="err"
+                shift
+                ;;
+            -v|--verbose)
+                PRIORITY=""
+                shift
+                ;;
+            --help)
+                show_help
+                exit 0
+                ;;
+            *)
+                echo -e "${RED}Error: Unknown option: $1${NC}"
+                echo "Use --help for usage information"
+                exit 1
+                ;;
+        esac
+    done
+fi
+
+# Check if service exists
+if ! systemctl list-unit-files | grep -q "$SERVICE_NAME"; then
+    echo -e "${YELLOW}Warning: $SERVICE_NAME is not installed${NC}"
+    echo "Install the service first with: ./install_email_tunnel.sh"
+    exit 1
+fi
+
+# Show status if requested
+if [ "$SHOW_STATUS" = true ]; then
+    show_status
+    exit 0
+fi
+
+# Build journalctl command
+CMD="journalctl -u $SERVICE_NAME"
+
+# Add follow flag
+if [ "$FOLLOW" = true ]; then
+    CMD="$CMD -f"
+fi
+
+# Add line limit
+if [ "$SHOW_ALL" = false ] && [ "$FOLLOW" = false ]; then
+    CMD="$CMD -n $LINES"
+fi
+
+# Add time filter
+if [ -n "$SINCE" ]; then
+    if [ "$SINCE" = "boot" ]; then
+        CMD="$CMD -b"
+    else
+        CMD="$CMD --since \"$SINCE\""
+    fi
+fi
+
+# Add priority filter
+if [ -n "$PRIORITY" ]; then
+    CMD="$CMD -p $PRIORITY"
+fi
+
+# Add no-pager for non-follow mode
+if [ "$FOLLOW" = false ]; then
+    CMD="$CMD --no-pager"
+fi
+
+# Show what we're doing
+if [ "$FOLLOW" = true ]; then
+    echo -e "${GREEN}Following logs for $SERVICE_NAME...${NC}"
+    echo "Press Ctrl+C to stop"
+    echo ""
+elif [ -n "$SINCE" ]; then
+    echo -e "${GREEN}Showing logs since $SINCE...${NC}"
+    echo ""
+elif [ "$SHOW_ALL" = true ]; then
+    echo -e "${GREEN}Showing all logs for $SERVICE_NAME...${NC}"
+    echo ""
+else
+    echo -e "${GREEN}Showing last $LINES log lines for $SERVICE_NAME...${NC}"
+    echo ""
+fi
+
+# Execute the command
+eval "$CMD"