Switch from TSLint -> ESLint, apply Prettier

Author: bcherny

.eslintrc.json

@@ -0,0 +1,39 @@
+{
+  "extends": ["prettier/@typescript-eslint", "plugin:prettier/recommended"],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": 2020,
+    "project": "./tsconfig.json",
+    "sourceType": "module"
+  },
+  "plugins": ["@typescript-eslint"],
+  "rules": {
+    "@typescript-eslint/adjacent-overload-signatures": "error",
+    "@typescript-eslint/ban-types": "error",
+    "camelcase": "off",
+    "@typescript-eslint/camelcase": "error",
+    "@typescript-eslint/class-name-casing": "error",
+    "@typescript-eslint/consistent-type-assertions": "error",
+    "@typescript-eslint/interface-name-prefix": "error",
+    "@typescript-eslint/member-delimiter-style": [
+      "error",
+      { "multiline": { "delimiter": "none" } }
+    ],
+    "no-array-constructor": "off",
+    "@typescript-eslint/no-array-constructor": "error",
+    "no-empty-function": "off",
+    "@typescript-eslint/no-empty-function": "error",
+    "@typescript-eslint/no-empty-interface": "error",
+    "@typescript-eslint/no-inferrable-types": "error",
+    "@typescript-eslint/no-misused-new": "error",
+    "@typescript-eslint/no-namespace": "error",
+    "@typescript-eslint/no-this-alias": "error",
+    "no-unused-vars": "off",
+    "@typescript-eslint/no-unused-vars": "warn",
+    "@typescript-eslint/type-annotation-spacing": "error",
+    "no-var": "error",
+    "prefer-const": "error",
+    "prefer-rest-params": "error",
+    "prefer-spread": "error"
+  }
+}

.prettierrc

@@ -0,0 +1,10 @@
+{
+  "bracketSpacing": false,
+  "endOfLine": "lf",
+  "parser": "typescript",
+  "printWidth": 120,
+  "semi": false,
+  "singleQuote": true,
+  "trailingComma": "none",
+  "useTabs": false
+}

package.json

@@ -15,11 +15,11 @@
     "build:browser": "browserify src/index.ts -s jstt -p tsify > dist/bundle.js",
     "build:server": "tsc -d",
     "clean": "shx rm -rf dist",
-    "lint": "tslint -c tslint.json src/*.ts",
+    "lint": "eslint src/*.ts",
     "tdd": "concurrently -r -p '' -k 'npm run watch' 'npm run watch:test'",
     "test": "ava --serial --verbose",
     "prepublishOnly": "npm test",
-    "pretest": "npm run build",
+    "pretest": "npm run build && npm run lint",
     "watch": "tsc -w",
     "watch:test": "ava -w"
   },
@@ -54,21 +54,25 @@
     "lodash": "^4.17.11",
     "minimist": "^1.2.0",
     "mz": "^2.7.0",
-    "prettier": "^1.18.2",
+    "prettier": "^1.19.1",
     "stdin": "0.0.1"
   },
   "devDependencies": {
     "@types/cli-color": "^0.3.29",
     "@types/lodash": "^4.14.121",
     "@types/minimist": "^1.2.0",
     "@types/mz": "0.0.32",
+    "@typescript-eslint/eslint-plugin": "^2.9.0",
+    "@typescript-eslint/parser": "^2.9.0",
     "ava": "^1.2.1",
     "browserify": "^16.2.3",
     "browserify-shim": "^3.8.14",
     "concurrently": "^4.1.0",
+    "eslint": "^6.7.2",
+    "eslint-config-prettier": "^6.7.0",
+    "eslint-plugin-prettier": "^3.1.1",
     "shx": "^0.3.2",
     "tsify": "^4.0.1",
-    "tslint": "^5.13.1",
     "typescript": "^3.3.3333"
   },
   "ava": {

src/cli.ts

@@ -1,23 +1,24 @@
 #!/usr/bin/env node
 
-import { whiteBright } from 'cli-color'
-import { JSONSchema4 } from 'json-schema'
+import {whiteBright} from 'cli-color'
+import {JSONSchema4} from 'json-schema'
 import minimist = require('minimist')
-import { readFile, writeFile } from 'mz/fs'
-import { resolve } from 'path'
+import {readFile, writeFile} from 'mz/fs'
+import {resolve} from 'path'
 import stdin = require('stdin')
-import { compile, Options } from './index'
+import {compile, Options} from './index'
 
-main(minimist(process.argv.slice(2), {
-  alias: {
-    help: ['h'],
-    input: ['i'],
-    output: ['o']
-  }
-}))
+main(
+  minimist(process.argv.slice(2), {
+    alias: {
+      help: ['h'],
+      input: ['i'],
+      output: ['o']
+    }
+  })
+)
 
 async function main(argv: minimist.ParsedArgs) {
-
   if (argv.help) {
     printHelp()
     process.exit(0)
@@ -34,7 +35,6 @@ async function main(argv: minimist.ParsedArgs) {
     console.error(whiteBright.bgRedBright('error'), e)
     process.exit(1)
   }
-
 }
 
 function readInput(argIn?: string) {
@@ -60,7 +60,7 @@ function printHelp() {
   const pkg = require('../../package.json')
 
   process.stdout.write(
-`
+    `
 ${pkg.name} ${pkg.version}
 Usage: json2ts [--input, -i] [IN_FILE] [--output, -o] [OUT_FILE] [OPTIONS]
 

src/formatter.ts

@@ -1,6 +1,6 @@
-import { format as prettify } from 'prettier'
-import { Options } from './'
+import {format as prettify} from 'prettier'
+import {Options} from './'
 
 export function format(code: string, options: Options): string {
-  return prettify(code, { parser: 'typescript', ...options.style })
+  return prettify(code, {parser: 'typescript', ...options.style})
 }