grab the actual twig engine out of the past and bring it forward,

changing all relevant strings and version numbers

Author: geoffp

README.md

@@ -1,5 +1,5 @@
-## The Underscore engine for Pattern Lab / Node
+## The Twig engine for Pattern Lab / Node
 
-To install the Underscore engine in your edition, `npm install patternengine-node-underscore` should do the trick.
+To install the Twig engine in your edition, `npm install patternengine-node-twig` should do the trick.
 
-Level of support is basic; you can author patterns in Underscore, but support for calling pattern partials is accomplished through an Underscore mixin, and is considered experimental.
+Level of Support is more or less full. Partial calls and lineage hunting are supported. Twig does not support the mustache-specific syntax extensions, style modifiers and pattern parameters, because their use cases are addressed by the core Twig feature set.

lib/engine_twig.js

@@ -0,0 +1,82 @@
+/*
+ * twig pattern engine for patternlab-node - v0.15.1 - 2015
+ *
+ * Geoffrey Pursell, Brian Muenzenmeyer, and the web community.
+ * Licensed under the MIT license.
+ *
+ * Many thanks to Brad Frost and Dave Olsen for inspiration, encouragement, and advice.
+ *
+ */
+
+/*
+ * ENGINE SUPPORT LEVEL:
+ *
+ * Full. Partial calls and lineage hunting are supported. Twig does not support
+ * the mustache-specific syntax extensions, style modifiers and pattern
+ * parameters, because their use cases are addressed by the core Twig feature
+ * set.
+ *
+ */
+
+"use strict";
+
+var Twig = require('twig');
+var twig = Twig.twig;
+
+var engine_twig = {
+  engine: Twig,
+  engineName: 'twig',
+  engineFileExtension: '.twig',
+
+  //Important! Needed for Twig compilation. Can't resolve paths otherwise.
+  expandPartials: true,
+
+  // regexes, stored here so they're only compiled once
+  findPartialsRE: /{%\s*(?:extends|include|embed)\s+('[^']+'|"[^"]+").*?%}/g,
+  findPartialKeyRE: /"((?:\\.|[^"\\])*)"/,
+  findListItemsRE: /({{#( )?)(list(I|i)tems.)(one|two|three|four|five|six|seven|eight|nine|ten|eleven|twelve|thirteen|fourteen|fifteen|sixteen|seventeen|eighteen|nineteen|twenty)( )?}}/g, // TODO
+
+  // render it
+  renderPattern: function renderPattern(pattern, data) {
+    var result = twig({
+      data: pattern.extendedTemplate
+    }).render(data);
+
+    return result;
+  },
+
+  // find and return any {% include 'template-name' %} within pattern
+  findPartials: function findPartials(pattern) {
+    var matches = pattern.template.match(this.findPartialsRE);
+    return matches;
+  },
+  findPartialsWithStyleModifiers: function () {
+    // TODO: make the call to this from oPattern objects conditional on their
+    // being implemented here.
+    return [];
+  },
+
+  // returns any patterns that match {{> value(foo:"bar") }} or {{>
+  // value:mod(foo:"bar") }} within the pattern
+  findPartialsWithPatternParameters: function () {
+    // TODO: make the call to this from oPattern objects conditional on their
+    // being implemented here.
+    return [];
+  },
+  findListItems: function (pattern) {
+    var matches = pattern.template.match(this.findListItemsRE);
+    return matches;
+  },
+
+  // given a pattern, and a partial string, tease out the "pattern key" and
+  // return it.
+  findPartial: function (partialString) {
+    //var partialKey = partialString.replace(this.findPartialsRE, '$1');
+    var partial = partialString.match(this.findPartialKeyRE)[0];
+    partial = partial.replace(/"/g, '');
+
+    return partial;
+  }
+};
+
+module.exports = engine_twig;

package.json

@@ -1,10 +1,10 @@
 {
-  "name": "patternengine-node-underscore",
-  "description": "The Underscore engine for Pattern Lab / Node",
-  "version": "1.1.1",
-  "main": "lib/engine_underscore.js",
+  "name": "patternengine-node-twig",
+  "description": "The Twig engine for Pattern Lab / Node",
+  "version": "0.1.0",
+  "main": "lib/engine_twig.js",
   "dependencies": {
-    "underscore": "^1.8.3"
+    "twig": "^0.9.5"
   },
   "devDependencies": {},
   "keywords": [
@@ -14,13 +14,13 @@
     "Grunt",
     "Gulp",
     "Javascript",
-    "Underscore"
+    "Twig"
   ],
   "repository": {
     "type": "git",
-    "url": "https://github.com/pattern-lab/patternengine-node-underscore.git"
+    "url": "https://github.com/pattern-lab/patternengine-node-twig.git"
   },
-  "bugs": "https://github.com/pattern-lab/patternengine-node-underscore/issues",
+  "bugs": "https://github.com/pattern-lab/patternengine-node-twig/issues",
   "author": "Brian Muenzenmeyer & Geoffrey Pursell",
   "license": "MIT",
   "scripts": {