refactor: filepath resolving into getTemplate

dist/liquid.js

@@ -273,18 +273,17 @@ var _engine = {
 
         if (!filepath) throw new Error('filepath cannot be null');
 
-        filepath = resolvePath(this.options.root, filepath);
-
-        if (!filepath.match(/\.\w+$/)) {
-            filepath += this.options.extname;
-        }
-
         return this.getTemplate(filepath).then(function (html) {
             var tpl = _this2.options.cache && _this2.cache[filepath] || _this2.parse(html);
             return _this2.options.cache ? _this2.cache[filepath] = tpl : tpl;
         });
     },
     getTemplate: function getTemplate(filepath) {
+        filepath = resolvePath(this.options.root, filepath);
+
+        if (!filepath.match(/\.\w+$/)) {
+            filepath += this.options.extname;
+        }
         return new Promise(function (resolve, reject) {
             fs.readFile(filepath, 'utf8', function (err, html) {
                 err ? reject(err) : resolve(html);

index.js

@@ -75,12 +75,6 @@ var _engine = {
     handleCache: function(filepath) {
         if (!filepath) throw new Error('filepath cannot be null');
 
-        filepath = resolvePath(this.options.root, filepath);
-
-        if (!filepath.match(/\.\w+$/)) {
-            filepath += this.options.extname;
-        }
-
         return this.getTemplate(filepath)
             .then((html) => {
                 var tpl = this.options.cache && this.cache[filepath] || this.parse(html);
@@ -88,6 +82,11 @@ var _engine = {
             });
     },
     getTemplate: function(filepath) {
+        filepath = resolvePath(this.options.root, filepath);
+
+        if (!filepath.match(/\.\w+$/)) {
+            filepath += this.options.extname;
+        }
         return new Promise(function(resolve, reject) {
             fs.readFile(filepath, 'utf8', function(err, html) {
                 err ? reject(err) : resolve(html);

package.json

@@ -1,6 +1,6 @@
 {
   "name": "shopify-liquid",
-  "version": "1.2.2",
+  "version": "1.2.3",
   "description": "Liquid template engine in Node.js (Shopify compliant)",
   "main": "index.js",
   "scripts": {