Fixed compatibility with grunt 0.4

package.json

@@ -36,6 +36,9 @@
     "grunt": "~0.3.9"
   },
   "keywords": [
-    "gruntplugin"
+    "gruntplugin",
+    "pdf",
+    "convert",
+    "html"
   ]
 }

tasks/lib/wkhtmltopdf-lib.js

@@ -0,0 +1,49 @@
+/*
+* grunt-wkhtmltopdf
+* http://www.dhar.fr/grunt-wkhtmltopdf/
+*
+* Copyright (c) 2012 Olivier Audard, contributors
+* Licensed under the MIT license.
+*/
+/*globals exports:false*/
+
+exports.init = function(grunt) {
+  'use strict';
+
+  return {
+    convert: function(options) {
+
+      if (!options || !options.args) {
+        grunt.warn("You need to specify atleast one input file, and exactly one output file");
+        return null;
+      }
+
+      // TODO: ditch this when grunt v0.4 is released
+      grunt.util = grunt.util || grunt.utils;
+
+      return grunt.util.spawn({
+        cmd: 'wkhtmltopdf',
+        args: options.args
+      }, function(err, result, code) {
+        grunt.log.writeln('wkhtmltopdf done');
+        if (!err) { return options.done(null); }
+        // Something went horribly wrong.
+        grunt.verbose.or.writeln();
+        grunt.log.write('Running wkhtmltopdf...').error();
+        if (code === 127) {
+          grunt.log.errorlns(
+            'In order for this task to work properly, wkhtmltopdf must be ' +
+            'installed and in the system PATH (if you can run "wkhtmltopdf" at' +
+            ' the command line, this task should work). Unfortunately, ' +
+            'wkhtmltopdf cannot be installed automatically via npm or grunt. '
+          );
+          grunt.warn('wkhtmltopdf not found.', options.code);
+        } else {
+          result.split('\n').forEach(grunt.log.error, grunt.log);
+          grunt.warn('wkhtmltopdf exited unexpectedly with exit code ' + code + '.', options.code);
+        }
+        options.done(code);
+      });
+    }
+  };
+};

tasks/wkhtmltopdf.js

@@ -5,7 +5,7 @@
  * Copyright (c) 2012 Olivier Audard
  * Licensed under the MIT license.
  */
-/*globals module:false*/
+/*globals module:false, require:false*/
 module.exports = function(grunt) {
 
   // Please see the grunt documentation for more information regarding task and
@@ -14,6 +14,7 @@ module.exports = function(grunt) {
   // ==========================================================================
   // TASKS
   // ==========================================================================
+  var helper = require('./lib/wkhtmltopdf-lib').init(grunt);
 
   grunt.registerTask('wkhtmltopdf', 'Your task description goes here.', function() {
     grunt.config.requires('wkhtmltopdf.src');
@@ -35,7 +36,7 @@ module.exports = function(grunt) {
           srcpath.replace(/.*\/([^\/]+)\.html/, '$1.pdf');
 
       // Launch PhantomJS.
-      grunt.helper('wkhtmltopdf', {
+      helper.convert({
         code: 90,
         args: [
             '--dpi', '96',        // workarround to wkhtmltopdf letter-spacing bug (see http://code.google.com/p/wkhtmltopdf/issues/detail?id=72)
@@ -51,41 +52,4 @@ module.exports = function(grunt) {
       });
     });
   });
-
-  // ==========================================================================
-  // HELPERS
-  // ==========================================================================
-
-  grunt.registerHelper('wkhtmltopdf', function(options) {
-
-    if (!options || !options.args) {
-      grunt.warn("You need to specify atleast one input file, and exactly one output file");
-      return null;
-    }
-
-    return grunt.utils.spawn({
-      cmd: 'wkhtmltopdf',
-      args: options.args
-    }, function(err, result, code) {
-      grunt.log.writeln('wkhtmltopdf done');
-      if (!err) { return options.done(null); }
-      // Something went horribly wrong.
-      grunt.verbose.or.writeln();
-      grunt.log.write('Running wkhtmltopdf...').error();
-      if (code === 127) {
-        grunt.log.errorlns(
-          'In order for this task to work properly, wkhtmltopdf must be ' +
-          'installed and in the system PATH (if you can run "wkhtmltopdf" at' +
-          ' the command line, this task should work). Unfortunately, ' +
-          'wkhtmltopdf cannot be installed automatically via npm or grunt. '
-        );
-        grunt.warn('wkhtmltopdf not found.', options.code);
-      } else {
-        result.split('\n').forEach(grunt.log.error, grunt.log);
-        grunt.warn('wkhtmltopdf exited unexpectedly with exit code ' + code + '.', options.code);
-      }
-      options.done(code);
-    });
-  });
-
 };