I found watchman (https://facebook.github.io/watchman/) to be useful
in this kind of situation.

On Tue, Jan 2, 2018 at 12:17 PM, Simon Cruanes <simon.cruanes.2007@m4x.org>
wrote:

> I've been using a small script for the same purpose for a while now (as
> a Makefile target):
>
> watch:
>         while find src/ -print0 | xargs -0 inotifywait -e delete_self -e
> modify ; do \
>         jbuilder build @install; \
>         done
>
> --
> Simon Cruanes
>
> http://weusepgp.info/
> key 49AA62B6, fingerprint 949F EB87 8F06 59C6 D7D3  7D8D 4AC0 1D08 49AA
> 62B6
>