How to set Java version for lein

To select specific Java (JDK) to use for leiningen, set environment variable JAVA_CMD

For example,

JAVA_CMD=/path/to/bin/java lein repl

Credit: https://gist.github.com/camsaul/c982019fd915510677236cd4b720a583#gistcomment-3439527 

Start lein repl with test profile

When you try to run lein repl with test profile, you'll get warning/error message similar to this.

$ lein with-profile test repl

Warning: no nREPL dependency detected.

Be sure to include org.clojure/tools.nrepl in :dependencies of your profile.

... 

Error loading clojure.tools.nrepl.server: Could not locate clojure/tools/nrepl/server__init.class or clojure/tools/nrepl/server.clj on classpath: 

Error loading complete.core: Could not locate complete/core__init.class or complete/core.clj on classpath: 

Exception in thread "main" java.lang.ClassNotFoundException: clojure.tools.nrepl.server, compiling:(/private/var/folders/7d/98yf91rn0yz6wbh56h5q7rkh0000gn/T/form-init2792809345387087761.clj:1:1340)

The reason is because unlike default profile, tools.nrepl isn't added as dependency for test profile. You can verify this by comparing the output between lein pprint (or lein with-profile default pprint) and lein with-profile test pprint.

To fix this error, you can use the feature that lein provided combining profile like so;

$ lein with-profile default,test repl

With the command above, lein should start the repl without any errors.