Fixes tray app upgrades on mac

We need to close the tray app and remove it before
the new version can be installed. If the app was running
we restart the app.

Signed-off-by: Jon Morrow <jmorrow@chef.io>

omnibus/package-scripts/chef-workstation/postinst

@@ -33,18 +33,32 @@ for binary in $binaries; do
 done
 
 if is_darwin; then
+  restart_required=false
+  # Close the app if it is running.
+  if [ $(osascript -e 'application "Chef Workstation App" is running') = 'true' ]; then
+    restart_required=true
+    echo "Closing Chef Workstation App..."
+    osascript -e 'quit app "Chef Workstation App"' > /dev/null 2>&1;
+  fi
   # chef-workstation-app is configured to build Mac as a zip file instead
   # of a directory. Otherwise, the mac pkgbuild command will find the Chef Workstation App
   # within the larger Chef Workstatoin package, and will not include it in the Chef Workstation
   # package directly.
   echo "Moving Chef Workstation App to the Applications folder"
   pushd $INSTALLER_DIR/components/chef-workstation-app
   unzip chef-workstation-app-mac.zip
+  sudo rm -rf "/Applications/Chef Workstation App.app"
   sudo mv "mac/Chef Workstation App.app" /Applications
   rm -r mac
   popd
 
   ln -sf $INSTALLER_DIR/bin/uninstall_chef_workstation $PREFIX/bin || error_exit "Cannot link uninstall_chef_workstation to $PREFIX/bin"
+
+  # Restart the app if it was running.
+  if $restart_required; then
+    echo "Restarting Chef Workstation App..."
+    osascript -e 'open app "Chef Workstation App"' > /dev/null 2>&1;
+  fi
 else # linux - postinst does not run for windows.
   cwa_app_path="$INSTALLER_DIR/components/chef-workstation-app/chef-workstation-app"
   ldd "$cwa_app_path" | grep "not found" >/dev/null 2>&1