I created some batch work and integrated it as ExternalTool to the IntelliJ IDEA. as described here: Configure Intellij IDEA to run batch file
But how can I add butt
It is quite easy.
Assuming that you already have an External Tool configured just right click on the menu bar and choose Customize Menus and Toolbars...
:
Next step is to mark the last item (whatever that is in your setup) in Main Toolbar
and select Add After...
:
Now you can select your external tool from the Choose Actions To Add
window (here you can also select an icon to use):
Action has been added:
And your button has been added to the toolbar: