Watchman

Watches files and records, or triggers actions, when they change. https://facebook.github.io/watchman/

A file watching service.

Purpose

Watchman exists to watch files and record when they actually change. It can also trigger actions (such as rebuilding assets) when matching files change.

Documentation

Head on over to https://facebook.github.io/watchman/

from https://github.com/facebook/watchman
---------

git clone https://github.com/facebook/watchman
$ cd watchman
$ git checkout v4.7.0  # the latest stable release
$ ./autogen.sh
$ ./configure
$ make
$ make install

from https://facebook.github.io/watchman/docs/install.html