View Enabling command line functionality
Like BBEdit and Textmate, Espresso can be invoked from the commandline; to do so you’ll use the “decaf” command. However, you first need to enable such functionality by creating a symbolic link to the decaf program somewhere in your shell path. A common location for custom user programs is /usr/local/bin, so here’s how to create a symbolic link there:
cd /usr/local/bin
sudo ln -s /Applications/Espresso.app/Contents/SharedSupport/Tools/decaf decaf
Once you’ve run those commands (and possibly rebooted your shell or created a new window) the decaf command should be available to you.