Awesome

rebar_auto_plugin

A rebar3 plugin for auto running compile on source file change reloading modules in the shell.

Prerequisite

On Linux you need to install inotify-tools.

-m: 1: inotifywait: not found

Use

Add the plugin only to your user local rebar config in ~/.config/rebar3/rebar.config:

{plugins, [rebar3_auto]}.

If you add it to your project rebar.config, it will get unloaded each time compilation occurs, thus breaking it.

Then run

    $ rebar3 compile

Then just call your plugin directly in an existing application:

(relx) $ rebar3 auto
===> Compiling rebar3_auto
Setting up watches.  Beware: since -r was given, this may take a while!
Watches established.
Erlang/OTP 18 [erts-7.1] [source] [64-bit] [smp:4:4] [async-threads:0] [hipe] [kernel-poll:false]

Eshell V7.1  (abort with ^G)
1> ===> This feature is experimental and may be modified or removed at any time.
Compiling rebar3_auto
Verifying dependencies...
Compiling relx
Compiling rebar3_auto
Verifying dependencies...
Compiling relx

1>

Custom extensions, thanks abxy.
Regex matches are supported, "$" is suffixed automatically, thanks xuchaoqian.

re:run(<<"file_name.erl_ab">>, <<ExtMatch/binary, "$">>)

To extend the list add an option to your rebar.config like so:

{extra_extensions, [".alp", ".hterl", ".erl(.*?)"]}.