fix #14 Allow using custom jshint.js

src/main/java/com/cj/jshintmojo/Mojo.java

@@ -87,6 +87,11 @@ public class Mojo extends AbstractMojo {
 	 */
 	private String ignoreFile = "";
 
+	/**
+	 * @parameter property="customJSHint"
+	 */
+	private File customJSHint = null;
+
     /**
      * @parameter property="jshint.version"
      */
@@ -119,13 +124,21 @@ public Mojo(String options, String globals, File basedir, List<String> directori
 		this.reportFile = reportFile;
 		this.ignoreFile = ignoreFile;
 	}
-
-	public void execute() throws MojoExecutionException, MojoFailureException {
-	    getLog().info("using jshint version " + version);
 
-	    final String jshintCode = getEmbeddedJshintCode(version);
-
-        final JSHint jshint = new JSHint(jshintCode);
+	public void execute() throws MojoExecutionException, MojoFailureException {
+        final JSHint jshint;
+        if (customJSHint == null) {
+            getLog().info("using jshint version " + version);
+            final String jshintCode = getEmbeddedJshintCode(version);
+            jshint = new JSHint(jshintCode);
+        } else {
+            getLog().info("using customJSHint " + customJSHint);
+            try {
+                jshint = new JSHint(customJSHint);
+            } catch (IOException e) {
+                throw new MojoExecutionException("Could not load customJSHint", e);
+            }
+        }
 
         final Config config = readConfig(this.options, this.globals, this.configFile, this.basedir, getLog());
         if (this.excludes.isEmpty() || (this.ignoreFile != null && !this.ignoreFile.isEmpty())) {

src/main/java/com/cj/jshintmojo/jshint/JSHint.java

@@ -1,37 +1,48 @@
 package com.cj.jshintmojo.jshint;
 
-import com.cj.jshintmojo.util.Rhino;
+import java.io.File;
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang.CharEncoding;
 import org.mozilla.javascript.EcmaError;
 import org.mozilla.javascript.NativeArray;
+import java.io.IOException;
 import org.mozilla.javascript.NativeObject;
 
 import java.io.InputStream;
 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
+import com.cj.jshintmojo.util.Rhino;
+import org.apache.commons.io.FileUtils;
 
 public class JSHint {
 
     private final Rhino rhino;
 
-    public JSHint (String jshintCode) {
+    public JSHint(File customJSHint) throws IOException {
+        rhino = createRhino(FileUtils.readFileToString(customJSHint, "UTF-8"));
+    }
+
+    public JSHint(String jshintCode) {
+        rhino = createRhino(resourceAsString(jshintCode));
+    }
 
-        rhino = new Rhino ();
+    private static Rhino createRhino(final String code) {
+        Rhino result = new Rhino();
         try {
-            rhino.eval (
+            result.eval(
                     "print=function(){};" +
-                            "quit=function(){};" +
-                            "arguments=[];");
+                    "quit=function(){};" +
+                    "arguments=[];");
 
-            rhino.eval (commentOutTheShebang (resourceAsString (jshintCode)));
+            result.eval(commentOutTheShebang(code));
         } catch (EcmaError e) {
-            throw new RuntimeException ("Javascript eval error:" + e.getScriptStackTrace (), e);
+            throw new RuntimeException("Javascript eval error:" + e.getScriptStackTrace(), e);
         }
+        return result;
     }
 
-    private String commentOutTheShebang (String code) {
+    private static String commentOutTheShebang(String code) {
         String minusShebang = code.startsWith ("#!") ? "//" + code : code;
         return minusShebang;
     }