Including files in Clojure without Leiningen: Could not locate file
<p>Trying to do a simple clojure program without that includes a function defined in another file. It is unable to find the file in the same directory.</p>

<pre><code>helloInclude
    src
        main.clj
        importer.clj
</code></pre>

<p><strong>main.clj</strong></p>

<pre><code>(ns main
  (:gen-class)
(:require [importer]))

(defn -main
  [&amp; args]
  (println "Hello, World!"))

(-main) 
(println (func 5 6))
</code></pre>

<p><strong>importer.clj</strong></p>

<pre><code>(ns importer
  (:gen-class))

(defn func
    [a b]
    (+ a b 1))
</code></pre>

<p>Executed from within the <code>src</code> directory with:</p>

<pre><code>java -jar "Path\To\Clojure\clojure-1.8.0\clojure-1.8.0.jar" -i main.clj
</code></pre>

<p>Returns error:</p>

<pre><code>Exception in thread "main" java.io.FileNotFoundException: Could not locate importer__init.class or importer.clj on classpath., compiling:(C:\Users\jamesjenkinson\Clojure\helloInclude\src\main.clj:1:1)
        at clojure.lang.Compiler.load(Compiler.java:7391)
        at clojure.lang.Compiler.loadFile(Compiler.java:7317)
        at clojure.main$load_script.invokeStatic(main.clj:275)
        at clojure.main$init_opt.invokeStatic(main.clj:277)
        at clojure.main$init_opt.invoke(main.clj:277)
        at clojure.main$initialize.invokeStatic(main.clj:308)
        at clojure.main$null_opt.invokeStatic(main.clj:342)
        at clojure.main$null_opt.invoke(main.clj:339)
        at clojure.main$main.invokeStatic(main.clj:421)
        at clojure.main$main.doInvoke(main.clj:384)
        at clojure.lang.RestFn.invoke(RestFn.java:421)
        at clojure.lang.Var.invoke(Var.java:383)
        at clojure.lang.AFn.applyToHelper(AFn.java:156)
        at clojure.lang.Var.applyTo(Var.java:700)
        at clojure.main.main(main.java:37)
Caused by: java.io.FileNotFoundException: Could not locate import__init.class or import.clj on classpath.
        at clojure.lang.RT.load(RT.java:456)
        at clojure.lang.RT.load(RT.java:419)
        at clojure.core$load$fn__5677.invoke(core.clj:5893)
        at clojure.core$load.invokeStatic(core.clj:5892)
        at clojure.core$load.doInvoke(core.clj:5876)
        at clojure.lang.RestFn.invoke(RestFn.java:408)
        at clojure.core$load_one.invokeStatic(core.clj:5697)
        at clojure.core$load_one.invoke(core.clj:5692)
        at clojure.core$load_lib$fn__5626.invoke(core.clj:5737)
        at clojure.core$load_lib.invokeStatic(core.clj:5736)
        at clojure.core$load_lib.doInvoke(core.clj:5717)
        at clojure.lang.RestFn.applyTo(RestFn.java:142)
        at clojure.core$apply.invokeStatic(core.clj:648)
        at clojure.core$load_libs.invokeStatic(core.clj:5774)
        at clojure.core$load_libs.doInvoke(core.clj:5758)
        at clojure.lang.RestFn.applyTo(RestFn.java:137)
        at clojure.core$apply.invokeStatic(core.clj:648)
        at clojure.core$require.invokeStatic(core.clj:5796)
        at clojure.core$require.doInvoke(core.clj:5796)
        at clojure.lang.RestFn.invoke(RestFn.java:408)
        at src.main$eval3$loading__5569__auto____4.invoke(main.clj:1)
        at src.main$eval3.invokeStatic(main.clj:1)
        at src.main$eval3.invoke(main.clj:1)
        at clojure.lang.Compiler.eval(Compiler.java:6927)
        at clojure.lang.Compiler.eval(Compiler.java:6916)
        at clojure.lang.Compiler.load(Compiler.java:7379)
        ... 14 more
</code></pre>

<p>Also tried explicitly calling classpath to be the current directory with:</p>

<pre><code>java -classpath . -jar "Path\To\Clojure\clojure-1.8.0\clojure-1.8.0.jar" -i main.clj
</code></pre>

<p>I am unable to use Leiningen for this. How should I properly reference the file?</p>

<p><strong>Edit:</strong>
Changed namespaces to top level.</p>