1 files changed, 17 insertions, 3 deletions
diff --git a/node_modules/tslint/lib/ruleLoader.js b/node_modules/tslint/lib/ruleLoader.js
index acc7a3881..152f7b641 100644
--- a/node_modules/tslint/lib/ruleLoader.js
+++ b/node_modules/tslint/lib/ruleLoader.js
@@ -91,15 +91,29 @@ function transformName(name) {
  * @param ruleName - A name of a rule in filename format. ex) "someLintRule"
  */
 function loadRule(directory, ruleName) {
-    var fullPath = path.join(directory, ruleName);
-    if (fs.existsSync(fullPath + ".js")) {
-        var ruleModule = require(fullPath);
+    var ruleFullPath = getRuleFullPath(directory, ruleName);
+    if (ruleFullPath !== undefined) {
+        var ruleModule = require(ruleFullPath);
         if (ruleModule !== undefined) {
             return ruleModule.Rule;
         }
     }
     return "not-found";
 }
+/**
+ * Returns the full path to a rule file. Path to rules are resolved using nodes path resolution.
+ * This allows developers to write custom rules in TypeScript, which then can be loaded by TS-Node.
+ * @param directory - An absolute path to a directory of rules
+ * @param ruleName - A name of a rule in filename format. ex) "someLintRule"
+ */
+function getRuleFullPath(directory, ruleName) {
+    try {
+        return require.resolve(path.join(directory, ruleName));
+    }
+    catch (e) {
+        return undefined;
+    }
+}
 function loadCachedRule(directory, ruleName, isCustomPath) {
     // use cached value if available
     var fullPath = path.join(directory, ruleName);