modified

build/node_modules/rechoir/lib/extension.js

@@ -0,0 +1,44 @@
+'use strict';
+
+var path = require('path');
+
+function getLongExtension(basename) {
+  if (basename[basename.length - 1] === '.') {
+    return null;
+  }
+
+  var startIndex = (basename[0] === '.') ? 1 : 0;
+
+  var dotIndex = basename.indexOf('.', startIndex);
+  if (dotIndex <= startIndex) {
+    return null;
+  }
+
+  return basename.slice(dotIndex);
+}
+
+function getPossibleExtensions(longExtension) {
+  var arr = [longExtension];
+  var len = longExtension.length;
+  var startIndex = 1;
+
+  while (startIndex < len) {
+    var dotIndex = longExtension.indexOf('.', startIndex);
+    if (dotIndex < 0) {
+      break;
+    }
+    arr.push(longExtension.slice(dotIndex));
+    startIndex = dotIndex + 1;
+  }
+
+  return arr;
+}
+
+module.exports = function(input) {
+  var basename = path.basename(input);
+  var longExtension = getLongExtension(basename);
+  if (!longExtension) {
+    return;
+  }
+  return getPossibleExtensions(longExtension);
+};