ESLint Plugin: Add the recommended Prettier config to enforce WP coding styles

.prettierrc.js

@@ -1,3 +1,3 @@
 // Import the default config file and expose it in the project root.
 // Useful for editor integrations.
-module.exports = require( '@wordpress/scripts/config/.prettierrc.js' );
+module.exports = require( '@wordpress/prettier-config' );

packages/eslint-plugin/CHANGELOG.md

@@ -20,10 +20,11 @@
 - New Rule: [`@wordpress/i18n-ellipsis`](https://github.com/WordPress/gutenberg/blob/master/packages/eslint-plugin/docs/rules/i18n-ellipsis.md)
 - The bundled `eslint-plugin-react` dependency has been updated from requiring `^7.14.3` to requiring `^7.19.0` ([#21424](https://github.com/WordPress/gutenberg/pull/21424)).
 
-### Bug Fix
+### Bug Fixes
 
 - The `@wordpress/valid-sprintf` rule now detects usage of `sprintf` via `i18n.sprintf` (e.g. when using `import * as i18n from '@wordpress/i18n'`).
 - `@wordpress/no-unused-vars-before-return` will correctly consider other unused variables after encountering an instance of an `excludePattern` option exception.
+- Added the recommended `Prettier` config that enforces WordPress coding style guidelines ([#21602](https://github.com/WordPress/gutenberg/pull/21602)).
 
 ## 4.0.0 (2020-02-10)
 

packages/eslint-plugin/configs/recommended.js

@@ -1,7 +1,15 @@
+/**
+ * WordPress dependencies
+ */
+const defaultPrettierConfig = require( '@wordpress/prettier-config' );
+
 module.exports = {
 	extends: [
 		require.resolve( './recommended-with-formatting.js' ),
 		'plugin:prettier/recommended',
 		'prettier/react',
 	],
+	rules: {
+		'prettier/prettier': [ 'error', defaultPrettierConfig ],
+	},
 };

packages/eslint-plugin/package.json

@@ -24,6 +24,7 @@
 	],
 	"main": "index.js",
 	"dependencies": {
+		"@wordpress/prettier-config": "file:../prettier-config",
 		"babel-eslint": "^10.1.0",
 		"eslint-config-prettier": "^6.10.1",
 		"eslint-plugin-jest": "^23.8.2",

packages/scripts/config/.eslintrc.js

@@ -1,9 +1,3 @@
-/**
- * Internal dependencies
- */
-const defaultPrettierConfig = require( './.prettierrc' );
-const { hasPrettierConfig } = require( '../utils' );
-
 const eslintConfig = {
 	root: true,
 	extends: [
@@ -17,16 +11,4 @@ const eslintConfig = {
 	],
 };
 
-if ( ! hasPrettierConfig() ) {
-	eslintConfig.rules = {
-		'prettier/prettier': [
-			'error',
-			defaultPrettierConfig,
-			{
-				usePrettierrc: false,
-			},
-		],
-	};
-}
-
 module.exports = eslintConfig;

packages/scripts/scripts/format-js.js

@@ -72,9 +72,11 @@ if ( ! checkResult.success ) {
 // needed for config, otherwise pass in args to default config in packages
 // See: https://prettier.io/docs/en/configuration.html
 let configArgs = [];
-// TODO: once setup, use @wordpress/prettier-config
 if ( ! hasPrettierConfig() ) {
-	configArgs = [ '--config', fromConfigRoot( '.prettierrc.js' ) ];
+	configArgs = [
+		'--config',
+		require.resolve( '@wordpress/prettier-config' ),
+	];
 }
 
 // If `--ignore-path` is not explicitly specified, use the project's or global .eslintignore