Create new loader for nunjucks to avoid infinite loop

1 files changed, 44 insertions, 0 deletions

diff --git a/lib/template/fs-loader.js b/lib/template/fs-loader.js
new file mode 100644
index 0000000..5720cb5
--- /dev/null
+++ b/lib/template/fs-loader.js
@@ -0,0 +1,44 @@
+var _ = require('lodash');
+var fs = require('fs');
+var path = require('path');
+var nunjucks = require('nunjucks');
+
+/*
+    Nunjucks loader similar to FileSystemLoader, but avoid infinite looping
+*/
+
+var Loader = nunjucks.Loader.extend({
+    init: function(searchPaths) {
+        this.searchPaths = searchPaths.map(path.normalize);
+    },
+
+    getSource: function(fullpath) {
+        fullpath = this.resolve(null, fullpath);
+
+        if(!fullpath) {
+            return null;
+        }
+
+        return {
+            src: fs.readFileSync(fullpath, 'utf-8'),
+            path: fullpath,
+            noCache: true
+        };
+    },
+
+    resolve: function(from, to) {
+        var resultFolder = _.find(this.searchPaths, function(basePath) {
+            var p = path.resolve(basePath, to);
+
+            return (
+                p.indexOf(basePath) === 0
+                && p != from
+                && fs.existsSync(p)
+            );
+        });
+
+        return path.resolve(resultFolder, to);
+    }
+});
+
+module.exports = Loader;