Makefile to run a clojure app in docker

Let’s say we have a small clojure app with two files:

build.boot

(set-env! :resource-paths #{"src"})

src/hello.clj

(ns hello)

(defn say-hello
  (println "hello"))

(defn -main
 (say-hello))

And we want to run this app via docker called via a Makefile. These are the steps you need to do:

Add a run boot task to the build.boot file:

(require '[hello])

(deftask run []
  (with-pass-thru _
    (hello/-main)))

Create a Makefile with the run target:

run:
	docker run --rm -e BOOT_LOCAL_REPO=/usr/src/app/.m2 -it -w /usr/src/app -v ${PWD}:/usr/src/app clojure:boot-alpine \
     boot run

Now you can run simply by doing:

make run

It is also useful to add a REPL target to the makefile:

repl:
	docker run --rm -e BOOT_LOCAL_REPO=/usr/src/app/.m2 -it -w /usr/src/app -v ${PWD}:/usr/src/app clojure:boot-alpine \
     boot repl

If you liked this post, you can share it with your followers or follow me on Twitter!