Re: Making a jar where the "main" class in manifest is from gen-class

[Stephen C. Gilardi]

On Jun 19, 2009, at 1:02 PM, timshawn wrote:

Hello clojure developers,
I had a question regarding jar-ring up clojure generated source using
gen-class.

When I do a gen-class, and say either :main is true, or add a -main
method, the class file that gets generated always has a random prefix.

One important need filled by gen-class is exactly this case: you need a class with a name you can specify completely and use elsewhere.

I need to enter the Main class in a jar's Manifest, and was wondering
how you guys have done it.

(ns
...
  clojure.contrib.repl-ln
  (:gen-class)
...)

(defn- -main
  "Main entry point, starts a repl enters the user
  namespace and processes command line args."
  [& args]
  (repl :init
        (fn []
          (println "Clojure" (clojure-version))
          (in-ns 'user)
          (process-command-line args))))



When compiled, this produces the class file:

clojure/contrib/repl_ln.class





--Steve

There's an example at clojure.contrib.repl_ln.clj. It uses just "(:gen- class)" (no options) in its "ns" declaration: (this could also have been defn rather than defn- and would behave the same regarding being callable from Java) You can see it in clojure.contrib.jar (either using a tool that can display its contents directly or bar unjarring it: jar xvf clojure.contrib.jar) If the example above doesn't lead you to a solution, please post more particulars and a simplified example that shows the problem you're seeing.

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