build.js: Merge invoke() into closureCompile().

Former-commit-id: 0fbdeffeba06c49db1d8b0801c8e3b721c3a5a43

build.js

@@ -40,59 +40,6 @@
 
   /*--------------------------------------------------------------------------*/
 
-  /**
-   * Invokes a process with the given `name`, `parameters`, and `source` (used as
-   * the standard input). Yields the result to a `callback` function. The optional
-   * `encoding` argument specifies the output stream encoding.
-   *
-   * @private
-   * @param {String} name The name of the process.
-   * @param {Array} parameters An array of arguments to proxy to the process.
-   * @param {String} source The standard input to proxy to the process.
-   * @param {String} [encoding] The expected encoding of the output stream.
-   * @param {Function} callback The function to call once the process completes.
-   */
-  function invoke(name, parameters, source, encoding, callback) {
-    // the standard error stream, standard output stream, and process instance
-    var error = '',
-        output = '',
-        process = spawn(name, parameters);
-
-    // juggle arguments
-    if (typeof encoding == 'string') {
-      // explicitly set the encoding of the output stream if one is specified
-      process.stdout.setEncoding(encoding);
-    } else {
-      callback = encoding;
-      encoding = null;
-    }
-
-    process.stdout.on('data', function(data) {
-      // append the data to the output stream
-      output += data;
-    });
-
-    process.stderr.on('data', function(data) {
-      // append the error message to the error stream
-      error += data;
-    });
-
-    process.on('exit', function(status) {
-      var exception = null;
-      // `status` contains the process exit code
-      if (status) {
-        exception = new Error(error);
-        exception.status = status;
-      }
-      callback(exception, output);
-    });
-
-    // proxy the standard input to the process
-    process.stdin.end(source);
-  }
-
-  /*--------------------------------------------------------------------------*/
-
   /**
    * Compresses a `source` string using the Closure Compiler. Yields the
    * minified result, and any exceptions encountered, to a `callback` function.
@@ -103,7 +50,34 @@
    */
   function closureCompile(source, callback) {
     console.log('Compressing lodash.js using the Closure Compiler...');
-    invoke('java', ['-jar', closurePath].concat(closureOptions), source, callback);
+
+    // the standard error stream, standard output stream, and Closure Compiler process
+    var error = '',
+        output = '',
+        compiler = spawn('java', ['-jar', closurePath].concat(closureOptions));
+
+    compiler.stdout.on('data', function(data) {
+      // append the data to the output stream
+      output += data;
+    });
+
+    compiler.stderr.on('data', function(data) {
+      // append the error message to the error stream
+      error += data;
+    });
+
+    compiler.on('exit', function(status) {
+      var exception = null;
+      // `status` contains the process exit code
+      if (status) {
+        exception = new Error(error);
+        exception.status = status;
+      }
+      callback(exception, output);
+    });
+
+    // proxy the standard input to the Closure Compiler
+    compiler.stdin.end(source);
   }
 
   /**