Fixing bug where the worker thread would hang if there wasn't a tslint.json file

lib/worker.js

@@ -123,8 +123,8 @@ async function lint(content, filePath, options) {
       return path.join(configurationDir, dir);
     });
 
-    if (rulesDirectory) {
-      rulesDirectory.push(rulesDirectory);
+    if (config.rulesDirectory) {
+      rulesDirectory.push(config.rulesDirectory);
     }
   }
 
@@ -133,8 +133,13 @@ async function lint(content, filePath, options) {
     rulesDirectory,
   }, options));
 
-  linter.lint(filePath, content, configuration);
-  const lintResult = linter.getResult();
+  let lintResult;
+  try {
+    linter.lint(filePath, content, configuration);
+    lintResult = linter.getResult();
+  } catch (err) {
+    lintResult = {};
+  }
 
   if (
     // tslint@<5

spec/fixtures/no-config/noConfig.ts

@@ -0,0 +1,2 @@
+const foo = 42;
+export default foo;

spec/linter-tslint-spec.js

@@ -2,8 +2,9 @@
 
 import * as path from 'path';
 
-const validPath = path.join(__dirname, 'fixtures', 'valid', 'valid.ts');
 const invalidPath = path.join(__dirname, 'fixtures', 'invalid', 'invalid.ts');
+const noConfigPath = path.join(__dirname, 'fixtures', 'no-config', 'noConfig.ts');
+const validPath = path.join(__dirname, 'fixtures', 'valid', 'valid.ts');
 
 describe('The TSLint provider for Linter', () => {
   const lint = require('../lib/main.js').provideLinter().lint;
@@ -47,4 +48,10 @@ describe('The TSLint provider for Linter', () => {
       }),
     );
   });
+
+  it('validates even when there is no tslint.json', () => {
+    waitsForPromise(() =>
+      atom.workspace.open(noConfigPath).then(editor => lint(editor)),
+    );
+  });
 });