Update DNClient Desktop via the cli

update-dnclient-desktop.sh

#!/bin/bash
set -eo pipefail
IFS=$'\n\t'

# Script to update DNClient Desktop.app
# Usage: ./update_dnclient.sh <download_url>

# Check if download URL is provided
if [ -z "$1" ]; then
  echo "Error: Download URL is required"
  echo "Usage: ./update_dnclient.sh <download_url>"
  exit 1
fi

DOWNLOAD_URL="$1"
APP_NAME="DNClient Desktop.app"
DOWNLOAD_FILENAME=$(basename "$DOWNLOAD_URL")

# Find the app location
echo "Looking for $APP_NAME..."
APP_PATH=$(mdfind "kMDItemFSName == '$APP_NAME'" | head -1)

if [ -z "$APP_PATH" ]; then
  echo "Error: Could not find $APP_NAME on this system"
  exit 1
fi

echo "Found $APP_NAME at: $APP_PATH"

# Ask the app to quit using AppleScript
echo "Asking $APP_NAME to quit..."
osascript -e "tell application \"$APP_NAME\" to quit"

# Wait a moment to ensure the app has time to quit
sleep 3

# Check if app is still running
if pgrep -f "$APP_NAME" >/dev/null; then
  echo "Warning: $APP_NAME is still running. Forcing quit..."
  pkill -f "$APP_NAME"
  sleep 2
fi

# Create a temporary directory for the download
TEMP_DIR=$(mktemp -d)
cd "$TEMP_DIR" || exit 1
echo "Downloading new version from $DOWNLOAD_URL..."

# Download the new version
curl -L -O "$DOWNLOAD_URL"

# Mounting the DMG
echo "Mounting DMG..."
MOUNT_POINT=$(/usr/libexec/PlistBuddy -c "Print :system-entities:0:mount-point" /dev/stdin <<<"$(hdiutil attach "$DOWNLOAD_FILENAME" -nobrowse -plist)")
echo "DMG mounted at $MOUNT_POINT"

# Determine the app location in the downloaded content
NEW_APP_PATH=$(find "$MOUNT_POINT" -name "$APP_NAME" -type d | head -1)

if [ -z "$NEW_APP_PATH" ]; then
  echo "Error: Could not find $APP_NAME in the downloaded package"
  # Clean up
  if [[ "$DOWNLOAD_FILENAME" == *.dmg ]]; then
    hdiutil detach "$MOUNT_POINT" -force
  fi
  rm -rf "$TEMP_DIR"
  exit 1
fi

# Get the parent directory of the existing app
APP_PARENT_DIR=$(dirname "$APP_PATH")

echo "Removing old version..."
rm -rf "$APP_PATH"

echo "Installing new version..."
cp -R "$NEW_APP_PATH" "$APP_PARENT_DIR/"
# Unmount the DMG
hdiutil detach "$MOUNT_POINT" -force

# Clean up
rm -rf "$TEMP_DIR"

echo "Starting $APP_NAME..."
open "$APP_PARENT_DIR/$APP_NAME"

echo "Update complete!"