Use new eslint-config-prettier override (#422)

Author: pvdlg

Diff for: lib/options-manager.js

@@ -89,6 +89,15 @@ const ENGINE_RULES = {
 	}
 };
 
+const PRETTIER_CONFIG_OVERRIDE = {
+	'@typescript-eslint/eslint-plugin': 'prettier/@typescript-eslint',
+	'eslint-plugin-babel': 'prettier/babel',
+	'eslint-plugin-flowtype': 'prettier/flowtype',
+	'eslint-plugin-react': 'prettier/react',
+	'eslint-plugin-standard': 'prettier/standard',
+	'eslint-plugin-vue': 'prettier/vue'
+};
+
 // Keep the same behaviour in mergeWith as deepAssign
 const mergeFn = (previousValue, value) => {
 	if (Array.isArray(previousValue) && Array.isArray(value)) {
@@ -281,23 +290,20 @@ const buildConfig = options => {
 
 	// If the user sets the `prettier` options then add the `prettier` plugin and config
 	if (options.prettier) {
-		// Disable formatting rules conflicting with Prettier
-		config.rules['unicorn/number-literal-case'] = 'off';
-		// Can be re-enabled when https://github.com/prettier/prettier/issues/4157 is fixed
-		config.rules['unicorn/no-nested-ternary'] = 'off';
 		// The prettier plugin uses Prettier to format the code with `--fix`
 		config.plugins = config.plugins.concat('prettier');
 		// The prettier config overrides ESLint stylistic rules that are handled by Prettier
 		config.baseConfig.extends = config.baseConfig.extends.concat('prettier');
+		config.baseConfig.extends = config.baseConfig.extends.concat('prettier/unicorn');
 		// The `prettier/prettier` rule reports errors if the code is not formatted in accordance to Prettier
 		config.rules['prettier/prettier'] = [
 			'error', mergeWithPrettierConfig(options, prettier.resolveConfig.sync(options.cwd || process.cwd()) || {})
 		];
 		// If the user has the React, Flowtype, or Standard plugin, add the corresponding Prettier rule overrides
 		// See https://github.com/prettier/eslint-config-prettier for the list of plugins overrrides
-		for (const override of ['react', 'flowtype', 'standard']) {
-			if (options.cwd && resolveFrom.silent(options.cwd, `eslint-plugin-${override}`)) {
-				config.baseConfig.extends = config.baseConfig.extends.concat(`prettier/${override}`);
+		for (const [plugin, prettierConfig] of Object.entries(PRETTIER_CONFIG_OVERRIDE)) {
+			if (options.cwd && resolveFrom.silent(options.cwd, plugin)) {
+				config.baseConfig.extends = config.baseConfig.extends.concat(prettierConfig);
 			}
 		}
 	}

Diff for: test/options-manager.js

@@ -91,7 +91,8 @@ test('buildConfig: prettier: true', t => {
 		trailingComma: 'none'
 	}]);
 	// eslint-prettier-config must always be last
-	t.deepEqual(config.baseConfig.extends.slice(-1), ['prettier']);
+	t.deepEqual(config.baseConfig.extends[config.baseConfig.extends.length - 1], 'prettier/unicorn');
+	t.deepEqual(config.baseConfig.extends[config.baseConfig.extends.length - 2], 'prettier');
 	// Indent rule is not enabled
 	t.is(config.rules.indent, undefined);
 	// Semi rule is not enabled