entr: --watch anything. Run arbitrary commands when files change.
entr is a commandline tool that brings --watch flag functionality to anything: from a popular tool that doesn't have --watch support yet to your bespoke shell script.
https://github.com/eradman/entr
http://eradman.com/entrproject/
0:00 Intro
0:29 Eslint example and breakdown
0:50 Ruby/Rack example
0:57 SQL query example and /_ explanation
1:21 Rendering Markdown example
1:43 Observing newly-created files
1:55 Outro