Question

After installing leiningen with this script https://raw.github.com/technomancy/leiningen/preview/bin/lein , I can use the repl by typing lein repl, so I think the clojure has already been installed by leiningen.

Do I need to download the JAR of the clojure again from the offical site?

If there’s no need to do this, where’s the JAR file of clojure that leiningten depends on?

Answer 1

What I’ve found with lein is installing it and then depending on a specific version of Clojure causes that version to be fetched, and the .jar file winds up in the maven repository.

(defproject repl-test "0.0.1-SNAPSHOT"
  :description "TODO: add summary of your project"
  :dependencies [[org.clojure/clojure "1.4.0"]
                 [org.clojure/clojure-contrib "1.2.0"]
                 [clojure-csv/clojure-csv "1.3.2"]
                 [org.clojure/tools.cli "0.1.0"]
                 [util "1.0.2-SNAPSHOT"]
                 [clj-http "0.1.3"]]
   :aot [repl-test.core]
   :main repl-test.core)

I’m not sure how Clojure is packaged with lein, but I do know from watching a lein build that it causes the version of Clojure in :dependencies to be fetched (downloaded).

lein is so good, that I actually un-installed default Clojure, because having lein is less of a pain when Clojure goes into a new revision.