Add feature detect for nth-child()

Gruntfile.js

@@ -3,6 +3,8 @@
 module.exports = function( grunt ) {
   'use strict';
 
+  var fs = require('fs');
+  var path = require('path');
   var modConfig = grunt.file.readJSON('lib/config-all.json');
 
   grunt.initConfig({
@@ -183,15 +185,18 @@ module.exports = function( grunt ) {
       }
     }
   });
+
   // Load required contrib packages
-  grunt.loadNpmTasks('grunt-contrib-jshint');
-  grunt.loadNpmTasks('grunt-contrib-qunit');
-  grunt.loadNpmTasks('grunt-contrib-nodeunit');
-  grunt.loadNpmTasks('grunt-contrib-uglify');
-  grunt.loadNpmTasks('grunt-contrib-watch');
-  grunt.loadNpmTasks('grunt-contrib-clean');
-  grunt.loadNpmTasks('grunt-contrib-copy');
-  grunt.loadNpmTasks('grunt-contrib-requirejs');
+  require('matchdep').filter('grunt-*').forEach(grunt.loadNpmTasks);
+
+  // devDependencies may or may not be installed
+  require('matchdep').filterDev('grunt-*').forEach(function (contrib) {
+    module.paths.forEach(function (dir) {
+      if (fs.existsSync(path.join(dir, contrib))) {
+        grunt.loadNpmTasks(contrib);
+      }
+    });
+  });
 
   // Strip define fn
   grunt.registerMultiTask('stripdefine', "Strip define call from dist file", function() {

feature-detects/css/gradients.js

@@ -4,6 +4,7 @@
   "caniuse": "css-gradients",
   "property": "cssgradients",
   "tags": ["css"],
+  "knownBugs": ["False-positives on webOS (https://github.com/Modernizr/Modernizr/issues/202)"],
   "notes": [{
     "name": "Webkit Gradient Syntax",
     "href": "http://webkit.org/blog/175/introducing-css-gradients/"

feature-detects/css/nthchild.js

@@ -0,0 +1,43 @@
+/*!
+{
+  "name": "CSS :nth-child pseudo-selector",
+  "caniuse": "css-sel3",
+  "property": "nthchild",
+  "tags": ["css"],
+  "notes": [
+    {
+      "name": "Related Github Issue",
+      "href": "https://github.com/Modernizr/Modernizr/pull/685"
+    },
+    {
+      "name": "Sitepoint :nth-child documentation",
+      "href": "http://reference.sitepoint.com/css/pseudoclass-nthchild"
+    }
+  ],
+  "authors": ["@emilchristensen"],
+  "warnings": ["Known false negative in Safari 3.1 and Safari 3.2.2"]
+}
+!*/
+/* DOC
+
+Detects support for the ':nth-child()' CSS pseudo-selector.
+
+*/
+define(['Modernizr', 'testStyles'], function( Modernizr, testStyles ) {
+  // 5 `<div>` elements with `1px` width are created.
+  // Then every other element has its `width` set to `2px`.
+  // A Javascript loop then tests if the `<div>`s have the expected width
+  // using the modulus operator.
+  testStyles('#modernizr div {width:1px} #modernizr div:nth-child(2n) {width:2px;}', function( elem ) {
+    Modernizr.addTest('nthchild', function() {
+      var elems = elem.getElementsByTagName('div'),
+      test = true;
+
+      for (var i = 0; i < 5; i++) {
+        test = test && elems[i].offsetWidth === i % 2 + 1;
+      }
+
+      return test;
+    });
+  }, 5);
+});

lib/cli.js

@@ -4,5 +4,6 @@
 var grunt = require("grunt");
 
 module.exports = {
-  build: require("./build")
+  build: require("./build"),
+  metadata: require("./generate-meta")
 };

package.json

@@ -12,16 +12,19 @@
     "requirejs": "~2.1.4",
     "underscore": "~1.4.4",
     "marked": "~0.2.8",
+    "matchdep": "~0.1.2",
     "grunt": "~0.4.0",
     "grunt-contrib-jshint": "~0.3.0",
     "grunt-contrib-uglify": "~0.2.0",
     "grunt-contrib-watch": "~0.3.1",
     "grunt-contrib-clean": "~0.4.0",
     "grunt-contrib-copy": "~0.4.0",
-    "grunt-contrib-qunit": "~0.2.0",
-    "grunt-contrib-nodeunit": "~0.2.0",
     "grunt-contrib-requirejs": "~0.4.0"
   },
+  "devDependencies": {
+    "grunt-contrib-qunit": "~0.2.0",
+    "grunt-contrib-nodeunit": "~0.2.0"
+  },
   "scripts": {
     "test": "grunt test"
   },