feat(load): add formatter option with default value

@commitlint/load/fixtures/formatter/commitlint.config.js

@@ -0,0 +1,3 @@
+module.exports = {
+	formatter: 'commitlint-junit'
+};

@commitlint/load/src/index.js

@@ -9,15 +9,19 @@ import pick from 'lodash.pick';
 import resolveFrom from 'resolve-from';
 
 const w = (a, b) => (Array.isArray(b) ? b : undefined);
-const valid = input => pick(input, 'extends', 'rules', 'parserPreset');
+const valid = input =>
+	pick(input, 'extends', 'rules', 'parserPreset', 'formatter');
 
 export default async (seed = {}, options = {cwd: process.cwd()}) => {
 	const loaded = await loadConfig(options.cwd, options.file);
 	const base = loaded.filepath ? path.dirname(loaded.filepath) : options.cwd;
 
 	// Merge passed config with file based options
 	const config = valid(merge(loaded.config, seed));
-	const opts = merge({extends: [], rules: {}}, pick(config, 'extends'));
+	const opts = merge(
+		{extends: [], rules: {}, formatter: '@commitlint/format'},
+		pick(config, 'extends')
+	);
 
 	// Resolve parserPreset key
 	if (typeof config.parserPreset === 'string') {

@commitlint/load/src/index.test.js

@@ -58,6 +58,7 @@ test('respects cwd option', async t => {
 	const cwd = await git.bootstrap('fixtures/recursive-extends/first-extended');
 	const actual = await load({}, {cwd});
 	t.deepEqual(actual, {
+		formatter: '@commitlint/format',
 		extends: ['./second-extended'],
 		rules: {
 			one: 1,
@@ -70,6 +71,7 @@ test('recursive extends', async t => {
 	const cwd = await git.bootstrap('fixtures/recursive-extends');
 	const actual = await load({}, {cwd});
 	t.deepEqual(actual, {
+		formatter: '@commitlint/format',
 		extends: ['./first-extended'],
 		rules: {
 			zero: 0,
@@ -84,6 +86,7 @@ test('recursive extends with json file', async t => {
 	const actual = await load({}, {cwd});
 
 	t.deepEqual(actual, {
+		formatter: '@commitlint/format',
 		extends: ['./first-extended'],
 		rules: {
 			zero: 0,
@@ -98,6 +101,7 @@ test('recursive extends with yaml file', async t => {
 	const actual = await load({}, {cwd});
 
 	t.deepEqual(actual, {
+		formatter: '@commitlint/format',
 		extends: ['./first-extended'],
 		rules: {
 			zero: 0,
@@ -112,6 +116,7 @@ test('recursive extends with js file', async t => {
 	const actual = await load({}, {cwd});
 
 	t.deepEqual(actual, {
+		formatter: '@commitlint/format',
 		extends: ['./first-extended'],
 		rules: {
 			zero: 0,
@@ -126,6 +131,7 @@ test('recursive extends with package.json file', async t => {
 	const actual = await load({}, {cwd});
 
 	t.deepEqual(actual, {
+		formatter: '@commitlint/format',
 		extends: ['./first-extended'],
 		rules: {
 			zero: 0,
@@ -160,6 +166,7 @@ test('ignores unknow keys', async t => {
 	const actual = await load({}, {cwd});
 
 	t.deepEqual(actual, {
+		formatter: '@commitlint/format',
 		extends: [],
 		rules: {
 			foo: 'bar',
@@ -173,6 +180,7 @@ test('ignores unknow keys recursively', async t => {
 	const actual = await load({}, {cwd});
 
 	t.deepEqual(actual, {
+		formatter: '@commitlint/format',
 		extends: ['./one'],
 		rules: {
 			zero: 0,
@@ -189,6 +197,7 @@ test('find up from given cwd', async t => {
 	const actual = await load({}, {cwd});
 
 	t.deepEqual(actual, {
+		formatter: '@commitlint/format',
 		extends: [],
 		rules: {
 			child: true,
@@ -204,6 +213,7 @@ test('find up config from outside current git repo', async t => {
 	const actual = await load({}, {cwd});
 
 	t.deepEqual(actual, {
+		formatter: '@commitlint/format',
 		extends: [],
 		rules: {
 			child: false,
@@ -212,3 +222,14 @@ test('find up config from outside current git repo', async t => {
 		}
 	});
 });
+
+test('respects formatter option', async t => {
+	const cwd = await git.bootstrap('fixtures/formatter');
+	const actual = await load({}, {cwd});
+
+	t.deepEqual(actual, {
+		formatter: 'commitlint-junit',
+		extends: [],
+		rules: {}
+	});
+});