feat: add eslint and prettier config

Author: alexforsyth

.eslintrc.js

@@ -0,0 +1,14 @@
+module.exports = {
+  parser: "@typescript-eslint/parser", // Specifies the ESLint parser
+  parserOptions: {
+    ecmaVersion: 2020, // Allows for the parsing of modern ECMAScript features
+    sourceType: "module" // Allows for the use of imports
+  },
+  extends: [
+    "plugin:@typescript-eslint/recommended" // Uses the recommended rules from the @typescript-eslint/eslint-plugin
+  ],
+  rules: {
+    // Place to specify ESLint rules. Can be used to overwrite rules specified from the extended configs
+    // e.g. "@typescript-eslint/explicit-function-return-type": "off",
+  }
+};

.prettierrc.js

@@ -0,0 +1,7 @@
+module.exports = {
+  semi: true,
+  trailingComma: "all",
+  singleQuote: true,
+  printWidth: 120,
+  tabWidth: 4
+};

package.json

@@ -20,7 +20,8 @@
     "test:integration-legacy": "cucumber-js --fail-fast",
     "test:integration": "jest --config jest.config.integ.js --passWithNoTests",
     "test:protocols": "yarn build:protocols && lerna run test --scope '@aws-sdk/aws-*'",
-    "local-publish": "node ./scripts/verdaccio-publish/index.js"
+    "local-publish": "node ./scripts/verdaccio-publish/index.js",
+    "lint": "eslint 'packages/**/src/*.ts' --quiet --fix"
   },
   "repository": {
     "type": "git",
@@ -42,10 +43,15 @@
     "@types/chai-as-promised": "^7.1.2",
     "@types/fs-extra": "^8.0.1",
     "@types/jest": "^26.0.4",
+    "@typescript-eslint/eslint-plugin": "^3.6.0",
+    "@typescript-eslint/parser": "^3.6.0",
     "chai": "^4.2.0",
     "chai-as-promised": "^7.1.1",
     "codecov": "^3.4.0",
     "cucumber": "^6.0.5",
+    "eslint": "^7.4.0",
+    "eslint-config-prettier": "^6.11.0",
+    "eslint-plugin-prettier": "^3.1.4",
     "fs-extra": "^9.0.0",
     "generate-changelog": "^1.7.1",
     "husky": "^4.2.3",
@@ -66,7 +72,7 @@
     "lerna": "3.22.1",
     "lint-staged": "^10.0.1",
     "mocha": "^8.0.1",
-    "prettier": "2.0.5",
+    "prettier": "^2.0.5",
     "puppeteer": "^4.0.0",
     "ts-loader": "^7.0.5",
     "typescript": "~3.8.3",

tsconfig.json

@@ -9,10 +9,14 @@
     "noUnusedParameters": false,
     "removeComments": false,
     "incremental": true,
-    /**
-     * Nice to have:
-     */
     // "preserveConstEnums": true,
+    "noImplicitAny": true,
+    // "sourceMap": true,
+    "noUnusedLocals": true,
+    // "noImplicitReturns": true,
+    // "noImplicitThis": true,
+    // "alwaysStrict": true,
+    // "noFallthroughCasesInSwitch": true,
     "module": "commonjs",
     "moduleResolution": "node",
     "target": "es5",