Consolidate eslint setup

.eslintignore

@@ -0,0 +1,2 @@
+dist
+test

.eslintrc.js

@@ -0,0 +1,52 @@
+"use strict"
+
+module.exports = {
+  extends: [
+    "eslint:recommended",
+    "standard",
+    "plugin:import/errors",
+    "plugin:import/warnings"
+  ],
+  globals: {
+    BigInt: false,
+    Packages: false
+  },
+  overrides: [
+    {
+      files: ["acorn/src/bin/*.js", "bin/generate-identifier-regex.js"],
+      rules: {
+        "no-console": "off"
+      }
+    }
+  ],
+  plugins: ["eslint-plugin-import"],
+  rules: {
+    curly: "off",
+    eqeqeq: ["error", "always", {null: "ignore"}],
+    indent: [
+      "error",
+      2,
+      {
+        SwitchCase: 0,
+        VariableDeclarator: 2,
+        CallExpression: {arguments: "off"}
+      }
+    ],
+    "new-parens": "off",
+    "no-case-declarations": "off",
+    "no-cond-assign": "off",
+    "no-console": ["error", {allow: ["warn", "error"]}],
+    "no-fallthrough": "off",
+    "no-labels": "off",
+    "no-mixed-operators": "off",
+    "no-return-assign": "off",
+    "no-unused-labels": "error",
+    "no-var": "error",
+    "object-curly-spacing": ["error", "never"],
+    "one-var": "off",
+    "prefer-const": "off",
+    quotes: ["error", "double"],
+    "semi-spacing": "off",
+    "space-before-function-paren": ["error", "never"]
+  }
+}

acorn-loose/package.json

@@ -16,7 +16,9 @@
     "./package.json": "./package.json"
   },
   "version": "8.3.0",
-  "engines": {"node": ">=0.4.0"},
+  "engines": {
+    "node": ">=0.4.0"
+  },
   "dependencies": {
     "acorn": "^8.5.0"
   },

acorn-loose/rollup.config.js

@@ -8,7 +8,6 @@ export default {
       file: "acorn-loose/dist/acorn-loose.js",
       format: "umd",
       name: "acorn.loose",
-
       globals: {acorn: "acorn"}
     },
     {

acorn-walk/package.json

@@ -17,7 +17,9 @@
     "./package.json": "./package.json"
   },
   "version": "8.2.0",
-  "engines": {"node": ">=0.4.0"},
+  "engines": {
+    "node": ">=0.4.0"
+  },
   "maintainers": [
     {
       "name": "Marijn Haverbeke",

acorn/package.json

@@ -17,7 +17,9 @@
     "./package.json": "./package.json"
   },
   "version": "8.7.0",
-  "engines": {"node": ">=0.4.0"},
+  "engines": {
+    "node": ">=0.4.0"
+  },
   "maintainers": [
     {
       "name": "Marijn Haverbeke",
@@ -42,5 +44,7 @@
   "scripts": {
     "prepare": "cd ..; npm run build:main"
   },
-  "bin": {"acorn": "./bin/acorn"}
+  "bin": {
+    "acorn": "./bin/acorn"
+  }
 }

bin/generate-identifier-regex.js

@@ -1,14 +1,14 @@
-'use strict';
+"use strict"
 
 // Which Unicode version should be used?
-let pkg = require('../package.json')
+let pkg = require("../package.json")
 let dependencies = Object.keys(pkg.devDependencies)
 let unicodeVersion = dependencies.find((name) => /^@unicode\/unicode-\d/.test(name))
 
-let start = require(unicodeVersion + '/Binary_Property/ID_Start/code-points.js').filter(ch => ch > 0x7f)
+let start = require(unicodeVersion + "/Binary_Property/ID_Start/code-points.js").filter(ch => ch > 0x7f)
 let last = -1
-let cont = [0x200c, 0x200d].concat(require(unicodeVersion + '/Binary_Property/ID_Continue/code-points.js')
-    .filter(ch => ch > 0x7f && search(start, ch, last + 1) === -1))
+let cont = [0x200c, 0x200d].concat(require(unicodeVersion + "/Binary_Property/ID_Continue/code-points.js")
+  .filter(ch => ch > 0x7f && search(start, ch, last + 1) === -1))
 
 function search(arr, ch, starting) {
   for (let i = starting; arr[i] <= ch && i < arr.length; last = i++)
@@ -25,7 +25,7 @@ function generate(chars) {
   let astral = [], re = ""
   for (let i = 0, at = 0x10000; i < chars.length; i++) {
     let from = chars[i], to = from
-    while (i < chars.length - 1 && chars[i + 1] === to + 1) {i++; to++}
+    while (i < chars.length - 1 && chars[i + 1] === to + 1) { i++; to++ }
     if (to <= 0xffff) {
       if (from === to) re += esc(from)
       else if (from + 1 === to) re += esc(from) + esc(to)
@@ -47,10 +47,10 @@ let code = [
   `    const astralIdentifierCodes = ${JSON.stringify(contData.astral)}`
 ]
 
-if (process.argv.length != 3) {
+if (process.argv.length !== 3) {
   console.log(code.join("\n"))
 } else {
-  let {readFile} = require('fs')
+  let {readFile} = require("fs")
   readFile(process.argv[2], "utf8", function(err, data) {
     if (err) throw err
     for (let line of code)

bin/run_test262.js

@@ -5,19 +5,17 @@ const parse = require("../acorn").parse
 
 function loadList(filename) {
   return fs.readFileSync(filename, "utf8")
-      .split("\n")
-      .filter(Boolean)
+    .split("\n")
+    .filter(Boolean)
 }
 
 run(
   (content, {sourceType}) => parse(content, {sourceType, ecmaVersion: 13, allowHashBang: true, allowAwaitOutsideFunction: sourceType === "module"}),
   {
     testsDirectory: path.dirname(require.resolve("test262/package.json")),
     skip: test => test.attrs.features &&
-      loadList("./bin/test262.unsupported-features").some(f => test.attrs.features.includes(f)
-    ),
+      loadList("./bin/test262.unsupported-features").some(f => test.attrs.features.includes(f)),
     whitelist: loadList("./bin/test262.whitelist")
-      .map(filename => path.sep === "/" ? filename : filename.split("/").join(path.sep)
-    )
+      .map(filename => path.sep === "/" ? filename : filename.split("/").join(path.sep))
   }
 )

package.json

@@ -21,15 +21,15 @@
   },
   "license": "MIT",
   "scripts": {
-    "prepare": "npm run test",
-    "test": "node test/run.js && node test/lint.js",
-    "pretest": "npm run build:main && npm run build:loose",
-    "test:test262": "node bin/run_test262.js",
     "build": "npm run build:main && npm run build:walk && npm run build:loose",
+    "build:loose": "rollup -c acorn-loose/rollup.config.js",
     "build:main": "rollup -c acorn/rollup.config.js",
     "build:walk": "rollup -c acorn-walk/rollup.config.js",
-    "build:loose": "rollup -c acorn-loose/rollup.config.js",
-    "lint": "eslint acorn/src/ acorn-walk/src/ acorn-loose/src/"
+    "lint": "eslint .",
+    "prepare": "npm run test",
+    "pretest": "npm run build:main && npm run build:loose",
+    "test": "node test/run.js && npm run lint",
+    "test:test262": "node bin/run_test262.js"
   },
   "devDependencies": {
     "@rollup/plugin-buble": "^0.21.3",