knock

knock

knock program [args..] runs a program and restarts it when its binary file has been changed.

It is mainly used to restart dev servers written in compiled languages (hi, Go!).

Contrary to many similar solutions, the trigger for a restart is a change of the target binary, not the source code change. It is a good assumption, as the source code is very often compiled-on-save by another tool or ide.

Enjoy!