Creating your own cljs command

Mike Fikes mentioned that he's suggested creating a cljs command for the command line that is similar to the current clj command. It sounds like a good idea that might take some time to get momentum. In the interim, you can create your own.

Option 1

Setup

Advantage is that it doesn't pollute your deps.edn for non-javascript work.

1. Add an alias to ~/.bash_profile

alias cljs='clj -Sdeps "{:deps {org.clojure/clojurescript {:mvn/version \"1.10.217\"}}}" -m cljs.main'
alias cljs.='clj -Sdeps "{:paths [\".\"] :deps {org.clojure/clojurescript {:mvn/version \"1.10.217\"}}}" -m cljs.main'

Usage

Run a simple command

cljs -re node -e "(+ 2 3)"

Get help

cljs --help

Run a program

Let's say you have a foo.cljs file with -main defined.

# foo.cljs
(ns foo)

(defn -main [& args]
  (println "hello world"))

Run it.

cljs. -re node -m foo

Run a script

Let's say you have a script named myscript.cljs.

# myscript.cljs
(defn do-something-cool []
  (println "hello world"))

(do-something-cool)

Run it.

cljs -re node myscript.cljs

Option 2

Disadvantage, will load the clojurescript.jar for all clj commands -- even non-javascript runs.

Setup

1. Add clojurescript dep to ~/.clojure/deps.edn

  :deps {
    org.clojure/clojurescript {:mvn/version "1.10.217"}
  }

2. Add an alias to ~/.bash_profile

alias cljs='clj -m cljs.main'

Usage

Run a simple command

cljs -re node -e "(+ 2 3)"

Get help

cljs --help