Relative 'extends' no longer error out in the XO VS Code extension, nor if running XO from a different folder

lib/options-manager.js

@@ -413,7 +413,7 @@ const buildExtendsConfig = options => config => {
 	if (options.extends && options.extends.length > 0) {
 		const configs = options.extends.map(name => {
 			// Don't do anything if it's a filepath
-			if (existsSync(name)) {
+			if (existsSync(path.resolve(options.cwd || process.cwd(), name))) {
 				return name;
 			}
 

test/fixtures/config-files/extends-relative/.xo-config.json

@@ -0,0 +1,3 @@
+{
+	"extends": "../../extends.js"
+}

test/fixtures/config-files/extends-relative/file.js

@@ -0,0 +1,5 @@
+const object = {
+	a: 1
+};
+
+console.log(object.a);

test/lint-files.js

@@ -318,3 +318,20 @@ test(configType, {type: '.xo-config.js', dir: 'xo-config_js'});
 test(configType, {type: '.xo-config.cjs', dir: 'xo-config_cjs'});
 test(configType, {type: '.xo-config.json', dir: 'xo-config_json'});
 test(configType, {type: '.xo-config', dir: 'xo-config'});
+
+test('load config file with relative extends from different cwd', async t => {
+	const directory = 'extends-relative';
+
+	const {results, rulesMeta} = await xo.lintFiles('**/*', {
+		cwd: path.resolve('fixtures', 'config-files', directory),
+	});
+
+	t.true(
+		hasRule(
+			results,
+			path.resolve('fixtures', 'config-files', directory, 'file.js'),
+			'comma-dangle',
+			rulesMeta,
+		),
+	);
+});

test/lint-text.js

@@ -135,7 +135,7 @@ test('extends `react` support with `prettier` option', async t => {
 
 test('regression test for #71', async t => {
 	const {results} = await xo.lintText('const foo = { key: \'value\' };\nconsole.log(foo);\n', {
-		extends: path.join(__dirname, 'fixtures/extends.js'),
+		extends: './fixtures/extends.js',
 	});
 	t.is(results[0].errorCount, 0);
 });

test/options-manager.js

@@ -416,12 +416,14 @@ test('buildConfig: extends', t => {
 		extends: [
 			'plugin:foo/bar',
 			'eslint-config-prettier',
+			'./fixtures/config-files/xo_config_js/xo.config.js',
 		],
 	});
 
-	t.deepEqual(config.baseConfig.extends.slice(-2), [
+	t.deepEqual(config.baseConfig.extends.slice(-3), [
 		'plugin:foo/bar',
 		path.resolve('../node_modules/eslint-config-prettier/index.js'),
+		'./fixtures/config-files/xo_config_js/xo.config.js',
 	]);
 });