Implement --reset-cache

lib/cli.js

@@ -1,5 +1,6 @@
 'use strict';
 const path = require('path');
+const del = require('del');
 const updateNotifier = require('update-notifier');
 const figures = require('figures');
 const arrify = require('arrify');
@@ -38,6 +39,7 @@ exports.run = () => { // eslint-disable-line complexity
 		  --tap, -t               Generate TAP output
 		  --color                 Force color output
 		  --no-color              Disable color output
+		  --reset-cache           Reset AVA's compilation cache and exit
 
 		Examples
 		  ava
@@ -95,14 +97,32 @@ exports.run = () => { // eslint-disable-line complexity
 				type: 'boolean',
 				default: 'color' in conf ? conf.color : require('supports-color').stdout !== false
 			},
+			'reset-cache': {
+				type: 'boolean',
+				default: false
+			},
 			'--': {
 				type: 'string'
 			}
 		}
 	});
 
 	updateNotifier({pkg: cli.pkg}).notify();
-	require('./chalk').set({enabled: cli.flags.color});
+	const chalk = require('./chalk').set({enabled: cli.flags.color});
+
+	if (cli.flags.resetCache) {
+		const cacheDir = path.join(projectDir, 'node_modules', '.cache', 'ava');
+		del('*', {
+			cwd: cacheDir,
+			nodir: true
+		}).then(() => {
+			console.error(`\n${chalk.green(figures.tick)} Removed AVA cache files in ${cacheDir}`);
+			process.exit(0); // eslint-disable-line unicorn/no-process-exit
+		}, err => {
+			exit(`Error removing AVA cache files in ${cacheDir}\n\n${chalk.gray((err && err.stack) || err)}`);
+		});
+		return;
+	}
 
 	if (cli.flags.watch && cli.flags.tap && !conf.tap) {
 		exit('The TAP reporter is not available when using watch mode.');

test/cli.js

@@ -836,3 +836,17 @@ test('additional arguments are forwarded to the worker', t => {
 		t.end();
 	});
 });
+
+test('--reset-cache resets cache', t => {
+	const cacheDir = path.join(__dirname, 'fixture', 'reset-cache', 'node_modules', '.cache', 'ava');
+	execCli([], {dirname: 'fixture/reset-cache'}, err => {
+		t.ifError(err);
+		t.true(fs.readdirSync(cacheDir).length > 0);
+
+		execCli(['--reset-cache'], {dirname: 'fixture/reset-cache'}, err => {
+			t.ifError(err);
+			t.true(fs.readdirSync(cacheDir).length === 0);
+			t.end();
+		});
+	});
+});

test/fixture/reset-cache/package.json

@@ -0,0 +1 @@
+{}

test/fixture/reset-cache/test.js

@@ -0,0 +1,3 @@
+import test from '../../..';
+
+test('pass', t => t.pass());