Set up eslint, tslint, and prettier (alangpierce#2)

Fow now it only runs on the main typescript code, but I'll enable it on the
parser later.

.eslintrc.js

@@ -0,0 +1,35 @@
+const tslintRules = require('./tslint.json');
+
+module.exports = {
+  "extends": ["airbnb-base", "prettier"],
+  parser: 'typescript-eslint-parser',
+  // Add typescript plugin but don't use it, since that tells WebStorm to run
+  // ESLint for .ts files.
+  plugins: ['prettier', 'tslint', 'typescript'],
+  rules: {
+    "class-methods-use-this": "off",
+    "import/extensions": "off",
+    "no-constant-condition": ["error", {"checkLoops": false}],
+    "no-continue": "off",
+    "no-empty-function": "off",
+    "no-param-reassign": "off",
+    "no-plusplus": "off",
+    "no-restricted-syntax": "off",
+    "no-undef": "off",
+    "no-unused-vars": "off",
+    "no-use-before-define": "off",
+    // False positive on TS constructors with initializers.
+    "no-useless-constructor": "off",
+    "prefer-destructuring": "off",
+    "prettier/prettier": "error",
+    "tslint/config": ["error", tslintRules],
+  },
+  settings: {
+    "import/extensions": ['.js', '.ts'],
+    "import/resolver": {
+      node: {
+        extensions: ['.js', '.ts'],
+      },
+    },
+  },
+};

.prettierrc

@@ -0,0 +1,7 @@
+{
+  "arrowParens": "always",
+  "bracketSpacing": false,
+  "parser": "typescript",
+  "printWidth": 100,
+  "trailingComma": "all",
+}

benchmark/benchmark.ts

@@ -1,38 +1,40 @@
 #!/usr/bin/env node
-import * as fs from 'fs';
-
+/* eslint-disable import/no-extraneous-dependencies */
+// @ts-ignore: buble missing types
+import * as babel from "@babel/core";
 // @ts-ignore: new babel-core package missing types.
-import * as babel from '@babel/core';
-// Use require rather than import to hack around missing type info.
-const buble = require('buble');
-import * as sucrase from '../src/index';
-import * as TypeScript from 'typescript';
+import * as buble from "buble";
+import * as fs from "fs";
+import * as TypeScript from "typescript";
+
+import * as sucrase from "../src/index";
 
 function main(): void {
-  console.log('Simulating transpilation of 100,000 lines of code:');
-  const code = fs.readFileSync('./benchmark/sample.js').toString();
-  runBenchmark('Sucrase', () => sucrase.transform(
-    code,
-    {transforms: ['jsx', 'imports', 'add-module-exports', 'react-display-name']})
+  console.log("Simulating transpilation of 100,000 lines of code:");
+  const code = fs.readFileSync("./benchmark/sample.js").toString();
+  runBenchmark("Sucrase", () =>
+    sucrase.transform(code, {
+      transforms: ["jsx", "imports", "add-module-exports", "react-display-name"],
+    }),
   );
-  runBenchmark('Buble (JSX, no import transform)', () =>
-    buble.transform(code, {transforms: {modules: false}})
+  runBenchmark("Buble (JSX, no import transform)", () =>
+    buble.transform(code, {transforms: {modules: false}}),
   );
-  runBenchmark('TypeScript', () =>
+  runBenchmark("TypeScript", () =>
     TypeScript.transpileModule(code, {
       compilerOptions: {
         module: TypeScript.ModuleKind.CommonJS,
         jsx: TypeScript.JsxEmit.React,
-        target: TypeScript.ScriptTarget.ESNext
-      }
-    })
+        target: TypeScript.ScriptTarget.ESNext,
+      },
+    }),
+  );
+  runBenchmark("Babel", () =>
+    babel.transform(code, {
+      presets: ["@babel/preset-react"],
+      plugins: ["@babel/plugin-transform-modules-commonjs"],
+    }),
   );
-  runBenchmark('Babel', () => babel.transform(
-    code,
-    {
-      presets: ['@babel/preset-react'],
-      plugins: ['@babel/plugin-transform-modules-commonjs']
-    }));
 }
 
 function runBenchmark(name: string, runTrial: () => void): void {

benchmark/profile.ts

@@ -6,13 +6,15 @@ import * as sucrase from '../src/index';
 function main(): void {
   console.log('Profiling Sucrase on about 100,000 LOC. Make sure you have Chrome DevTools for Node open.');
   const code = fs.readFileSync('./benchmark/sample.js').toString();
+  // tslint:disable-next-line no-any
   (console as any).profile('Sucrase');
   for (let i = 0; i < 1000; i++) {
     sucrase.transform(
       code,
       {transforms: ['jsx', 'imports', 'add-module-exports', 'react-display-name']}
     );
   }
+  // tslint:disable-next-line no-any
   (console as any).profileEnd('Sucrase');
 }
 

package.json

@@ -13,9 +13,10 @@
   "scripts": {
     "build": "script/build",
     "benchmark": "node ./build/benchmark/benchmark.js",
+    "lint": "eslint './src/**/*.ts' && tslint -p .",
     "profile": "node --inspect-brk ./build/benchmark/profile.js",
     "prepublish": "yarn run build",
-    "test": "mocha test"
+    "test": "yarn lint && mocha test"
   },
   "repository": {
     "type": "git",
@@ -43,9 +44,19 @@
     "@types/node": "^8.0.31",
     "babel-plugin-transform-charcodes": "0.0.10",
     "buble": "^0.16.0",
+    "eslint": "^4.13.1",
+    "eslint-config-airbnb-base": "^12.1.0",
+    "eslint-config-prettier": "^2.9.0",
+    "eslint-plugin-import": "^2.8.0",
+    "eslint-plugin-prettier": "^2.4.0",
+    "eslint-plugin-tslint": "^2.1.0",
+    "eslint-plugin-typescript": "^0.8.1",
     "mocha": "^3.5.3",
+    "prettier": "^1.9.2",
     "ts-node": "^4.0.2",
-    "typescript": "^2.6.2"
+    "tslint": "^5.8.0",
+    "typescript": "^2.6.2",
+    "typescript-eslint-parser": "^11.0.0"
   },
   "dependencies": {
     "charcodes": "0.0.10",