Add ESLint and Prettier tooling

.eslintrc.json

@@ -0,0 +1,10 @@
+{
+  "extends": ["plugin:github/es6"],
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["jest"],
+  "env": {
+    "node": true,
+    "es6": true,
+    "jest/globals": true
+  }
+}

.github/main.workflow

@@ -1,11 +1,23 @@
 workflow "CI" {
   on = "push"
-  resolves = "Test"
+  resolves = ["Format", "Lint", "Test"]
 }
 
 action "Dependencies" {
   uses = "actions/npm@v2.0.0"
-  args = "ci"
+  args = "install"
+}
+
+action "Format" {
+  needs = "Dependencies"
+  uses = "actions/npm@v2.0.0"
+  args = "run format"
+}
+
+action "Lint" {
+  needs = "Dependencies"
+  uses = "actions/npm@v2.0.0"
+  args = "run lint"
 }
 
 action "Test" {

.prettierrc.json

@@ -0,0 +1,11 @@
+{
+  "printWidth": 80,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": false,
+  "singleQuote": true,
+  "trailingComma": "none",
+  "bracketSpacing": false,
+  "arrowParens": "avoid",
+  "parser": "typescript"
+}

package.json

@@ -2,14 +2,21 @@
   "name": "root",
   "private": true,
   "scripts": {
+    "format": "prettier --check packages/**/*.ts",
+    "lint": "eslint packages/**/*.ts",
     "test": "jest"
   },
   "devDependencies": {
     "@types/jest": "^24.0.11",
     "@types/node": "^11.13.5",
+    "@typescript-eslint/parser": "^1.6.0",
+    "eslint": "^5.16.0",
+    "eslint-plugin-github": "^2.0.0",
+    "eslint-plugin-jest": "^22.4.1",
     "jest": "^24.7.1",
     "jest-circus": "^24.7.1",
     "lerna": "^3.13.3",
+    "prettier": "^1.17.0",
     "ts-jest": "^24.0.2",
     "typescript": "^3.4.4"
   }

packages/github/__tests__/github.test.ts

@@ -1,7 +1,7 @@
-import { github } from '../src/github';
+import {github} from '../src/github'
 
 describe('@actions/github', () => {
   it('needs tests', () => {
-      expect(github()).toBe(true)
-  });
-});
+    expect(github()).toBe(true)
+  })
+})