--- /dev/null
+'use strict';
+
+var path = require('path');
+
+function replaceExt(npath, ext) {
+ if (typeof npath !== 'string') {
+ return npath;
+ }
+
+ if (npath.length === 0) {
+ return npath;
+ }
+
+ var nFileName = path.basename(npath, path.extname(npath)) + ext;
+ return path.join(path.dirname(npath), nFileName);
+}
+
+module.exports = replaceExt;