Ignore directories when accepting empty extensions (fixes xojs#156)

index.js

@@ -31,7 +31,7 @@ exports.lintFiles = (patterns, opts) => {
 		patterns = '**/*';
 	}
 
-	return globby(patterns, {ignore: opts.ignores}).then(paths => {
+	return globby(patterns, {'ignore': opts.ignores, 'no-dir': true}).then(paths => {
 		// filter out unwanted file extensions
 		// for silly users that don't specify an extension in the glob pattern
 		paths = paths.filter(x => {

test/cli.js

@@ -42,6 +42,11 @@ test('ignore files in .gitignore', async t => {
 	}
 });
 
+test('ignore directories when accepting files without extensions', async () => {
+	const cwd = path.join(__dirname, 'fixtures/no-extension');
+	await execa('../../../cli.js', ['--no-local'], {cwd});
+});
+
 test('supports being extended with a shareable config', async () => {
 	const cwd = path.join(__dirname, 'fixtures/project');
 	await execa('../../../cli.js', ['--no-local'], {cwd});

test/fixtures/no-extension/child/binary

@@ -0,0 +1,5 @@
+'use strict'
+
+module.exports = function (foo) {
+  return foo + 'bar'
+}

test/fixtures/no-extension/package.json

@@ -0,0 +1,8 @@
+{
+  "xo": {
+    "extensions": ["", ".js"],
+    "ignores": [
+      "child/**"
+    ]
+  }
+}