cmdStart When a new command begins to run. Passes one arg, the command being run.
cmdEnd When a command finishes. Passes one arg, the command being run.
stdout When the stdout for the child-process recieves data. This streams the stdout data. Passes one arg, the chunk of data.
stderr When the stderr for the child-process recieves data. This streams the stderr data. Passes one arg, the chunk of data.
error When a shell-command
EventEmitter
boolean
Array<Function>