Add eslint config (#17)

.editorconfig

@@ -0,0 +1,10 @@
+# http://editorconfig.org
+root = true
+
+[*]
+indent_style = tab
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true

.gitignore

@@ -1,2 +1,3 @@
 /vendor/
 /composer.lock
+node_modules

composer.json

@@ -1,12 +1,15 @@
 {
-    "name": "dekodeinteraktiv/coding-standards",
-    "description": "Dekode Coding Standards",
-    "type": "phpcodesniffer-standard",
-    "require": {
-        "wp-coding-standards/wpcs": "^2.3",
-        "phpcompatibility/phpcompatibility-wp": "^2.1",
-        "dealerdirect/phpcodesniffer-composer-installer": "^0.6.2",
-        "automattic/phpcs-neutron-standard": "^1.6"
-    },
-    "license": "MIT"
+	"name": "dekodeinteraktiv/coding-standards",
+	"description": "Dekode Coding Standards",
+	"type": "phpcodesniffer-standard",
+	"require": {
+		"wp-coding-standards/wpcs": "^2.3",
+		"phpcompatibility/phpcompatibility-wp": "^2.1",
+		"dealerdirect/phpcodesniffer-composer-installer": "^0.6.2",
+		"automattic/phpcs-neutron-standard": "^1.6"
+	},
+	"license": "MIT",
+	"archive": {
+		"exclude": [ "/packages" ]
+	}
 }

packages/eslint-plugin/.eslintrc

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

packages/eslint-plugin/.npmignore

@@ -0,0 +1 @@
+.eslintrc

packages/eslint-plugin/.npmrc

@@ -0,0 +1 @@
+package-lock=false

packages/eslint-plugin/LICENSE.md

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) Dekode Interaktiv AS
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

packages/eslint-plugin/README.md

@@ -0,0 +1,48 @@
+# @dekode/eslint-plugin
+Dekodes's ESLint plugin, following our styleguide.
+
+## Installation
+You'll first need to install [ESLint](http://eslint.org):
+
+```
+$ npm i eslint --save-dev
+```
+
+Next, install [`@dekode/eslint-plugin`](https://github.com/DekodeInteraktiv/coding-standards/tree/master/packages/eslint-plugin):
+
+```
+$ npm install @dekode/eslint-plugin --save-dev
+```
+
+## Usage
+This plugin exports a [`base` config](index.js) that enforces best practices.
+
+Create your own `.eslintrc.js` configuration file:
+
+```js
+{
+	"extends": "plugin:@dekode/base",
+	"plugins": [
+		"@dekode"
+	]
+}
+```
+
+Or see the [ESLint docs](http://eslint.org/docs/user-guide/configuring.html#configuration-file-formats) for more information about configuration file formats.
+
+You can also stack any of the extra shared configs on top of the "base" config by extending an array of linting configs. For example, this package provides a React linting config, which can be added to the base config with the following configuration file:
+
+```js
+{
+	"extends": [
+		"plugin:@dekode/base",
+		"plugin:@dekode/react"
+	]
+}
+```
+
+## Available rulesets
+The following rulesets are available:
+
+*   **base**: Enforces best practices and possible errors
+*   **react**: Enforces best React.js practices

packages/eslint-plugin/index.js

@@ -0,0 +1,6 @@
+module.exports = {
+	configs: {
+		base: require( './lib/configs/base' ),
+		react: require( './lib/configs/react' ),
+	},
+};

packages/eslint-plugin/lib/configs/all.js

@@ -0,0 +1,23 @@
+/**
+ * External dependencies
+ */
+const merge = require( 'merge' );
+
+module.exports = {
+	plugins: [
+		'import',
+		'jsx-a11y',
+		'react',
+	],
+	rules: merge(
+		require( './rules/best-practices' ),
+		require( './rules/esnext' ),
+		require( './rules/import' ),
+		require( './rules/jsx-a11y' ),
+		require( './rules/possible-errors' ),
+		require( './rules/react' ),
+		require( './rules/strict' ),
+		require( './rules/stylistic-issues' ),
+		require( './rules/variables' ),
+	),
+};

packages/eslint-plugin/lib/configs/base.js

@@ -0,0 +1,28 @@
+/**
+ * External dependencies
+ */
+const merge = require( 'merge' );
+
+module.exports = {
+	parser: 'babel-eslint',
+	env: {
+		browser: true,
+		es6: true,
+		jest: true,
+		node: true,
+	},
+	parserOptions: {
+		ecmaVersion: 2018,
+		sourceType: 'module',
+	},
+	plugins: [ 'import' ],
+	rules: merge(
+		require( './rules/best-practices' ),
+		require( './rules/esnext' ),
+		require( './rules/import' ),
+		require( './rules/possible-errors' ),
+		require( './rules/strict' ),
+		require( './rules/stylistic-issues' ),
+		require( './rules/variables' ),
+	),
+};

packages/eslint-plugin/lib/configs/react.js

@@ -0,0 +1,27 @@
+/**
+ * External dependencies
+ */
+const merge = require( 'merge' );
+
+module.exports = {
+	plugins: [
+		'jsx-a11y',
+		'react',
+		'react-hooks',
+	],
+	parserOptions: {
+		ecmaFeatures: {
+			jsx: true,
+		},
+	},
+	settings: {
+		react: {
+			pragma: 'React',
+			version: '16',
+		},
+	},
+	rules: merge(
+		require( './rules/jsx-a11y' ),
+		require( './rules/react' ),
+	),
+};