feat: add eslint-config-typescript

docs/TODOS.md

@@ -5,5 +5,4 @@
 - find a way to publish on github push
 - create multiple ESLint packages for:
   - JavaScript only
-  - Typescript only
   - TypeScript + React

packages/eslint-config-typescript/.eslintrc.js

@@ -0,0 +1,47 @@
+const config = {
+  env: {
+    browser: true,
+    es6: true,
+    node: true,
+  },
+  root: true,
+  parser: '@typescript-eslint/parser',
+  plugins: ['@typescript-eslint', 'import', 'jsx-a11y'],
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/eslint-recommended',
+    'plugin:@typescript-eslint/recommended',
+    'prettier',
+    'prettier/@typescript-eslint',
+    'plugin:import/typescript',
+  ],
+  rules: {
+    '@typescript-eslint/explicit-function-return-type': 'off',
+    '@typescript-eslint/no-var-requires': 'off',
+    'import/no-default-export': 'error',
+    'import/no-deprecated': 'warn',
+    'import/order': [
+      'error',
+      {
+        pathGroupsExcludedImportTypes: ['builtin'],
+        groups: [
+          'builtin',
+          'external',
+          'internal',
+          'unknown',
+          'parent',
+          'sibling',
+          'index',
+        ],
+        'newlines-between': 'always',
+        alphabetize: { order: 'asc' },
+      },
+    ],
+    'import/prefer-default-export': 'off',
+  },
+  settings: {
+    'import/ignore': ['node_modules'],
+  },
+}
+
+module.exports = config

packages/eslint-config-typescript/README.md

@@ -0,0 +1,3 @@
+# @jdp-dev/eslint-config-typescript
+
+My shareable [ESLint](https://eslint.org/) config for [TypeScript](https://www.typescriptlang.org/) projects.

packages/eslint-config-typescript/__tests__/index.js

@@ -0,0 +1,6 @@
+const test = require('tape')
+
+test('entry point parses', (t) => {
+  t.doesNotThrow(() => require('..'), 'index does not throw')
+  t.end()
+})

packages/eslint-config-typescript/__tests__/validate-config.js

@@ -0,0 +1,20 @@
+const eslint = require('eslint')
+const test = require('tape')
+
+test('load config in eslint to validate all rule syntax is correct', (t) => {
+  const cli = new eslint.CLIEngine({
+    useEslintrc: false,
+    configFile: 'index.js',
+  })
+
+  const code = `
+  const greet = (name: string): void => {
+    console.log(\`Hello, \${name}!\`)
+  }
+`
+
+  const result = cli.executeOnText(code)
+
+  t.equal(result.errorCount, 0)
+  t.end()
+})

packages/eslint-config-typescript/index.js

@@ -0,0 +1 @@
+module.exports = require('./.eslintrc.js')

packages/eslint-config-typescript/package.json

@@ -0,0 +1,44 @@
+{
+  "name": "@jdp-dev/eslint-config-typescript",
+  "version": "0.0.3",
+  "description": "My shareable ESLint config for TypeScript projects.",
+  "private": false,
+  "homepage": "https://github.com/john-d-pelingo/jdp-scripts",
+  "author": {
+    "email": "johndarrylpelingo@gmail.com",
+    "name": "John Darryl Pelingo",
+    "url": "https://johndpelingo.com"
+  },
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/john-d-pelingo/jdp-scripts",
+    "directory": "packages/eslint-config"
+  },
+  "bugs": {
+    "url": "https://github.com/john-d-pelingo/jdp-scripts/issues"
+  },
+  "main": "index.js",
+  "scripts": {
+    "lint": "eslint . --config=.eslintrc.js",
+    "test": "npm run lint && tape __tests__/*.js"
+  },
+  "peerDependencies": {
+    "@typescript-eslint/eslint-plugin": "^4.9.0",
+    "@typescript-eslint/parser": "^4.9.0",
+    "eslint": "^7.14.0",
+    "eslint-plugin-import": "^2.22.1",
+    "eslint-plugin-jsx-a11y": "^6.4.1",
+    "typescript": "^4.1.2"
+  },
+  "dependencies": {
+    "@typescript-eslint/eslint-plugin": "^4.9.0",
+    "@typescript-eslint/parser": "^4.9.0",
+    "eslint": "^7.14.0",
+    "eslint-config-airbnb-typescript": "^12.0.0",
+    "eslint-config-prettier": "^6.15.0",
+    "eslint-plugin-import": "^2.22.1",
+    "eslint-plugin-jsx-a11y": "^6.4.1",
+    "typescript": "^4.1.2"
+  }
+}