clj CLI
clj command is a command line tool that is provided by Clojure Official.

Install for Mac
$ brew install clojure

Usage
See:
$ clj -h
$ clj -m cljs.main -h

Compile ClojureScript
Only clj command
$ clj -m cljs.main -O <none/whitespace/simple/advanced> -o <output path> -c <namespace>

Use figwheel.main
{:target-dir "resources"}

^{:watch-dirs ["src"]}
{:modules {:main {:entries #{<namespace>}
:output-to "<output path>"}}}

$ clj -m figwheel.main -O <none/whitespace/simple/advanced> -bo dev