Update build scripts to target Node.js 10 (#6908)

package.json

@@ -11,7 +11,7 @@
   "license": "MIT",
   "main": "./index.js",
   "engines": {
-    "node": ">=8"
+    "node": ">=10"
   },
   "dependencies": {
     "@angular/compiler": "8.2.13",

scripts/build/babel-plugins/replace-array-includes-with-indexof.js

@@ -1,32 +0,0 @@
-"use strict";
-
-//
-// BEFORE:
-//   [__something__].includes(__something__)
-//   CONSTANT_CASE.includes(__something__)
-//
-// AFTER:
-//   [__something__].indexOf(__something__) !== -1
-//   CONSTANT_CASE.indexOf(__something__) !== -1
-//
-
-module.exports = ({ types: t }) => ({
-  visitor: {
-    CallExpression(path) {
-      const node = path.node;
-      const callee = node.callee;
-      if (
-        t.isMemberExpression(callee, { computed: false }) &&
-        (t.isArrayExpression(callee.object) ||
-          (t.isIdentifier(callee.object) &&
-            (/^[A-Z_]+$/.test(callee.object.name) ||
-              // https://github.com/eemeli/yaml/blob/1005d01/src/Anchors.js#L45
-              callee.object.name === "names"))) &&
-        t.isIdentifier(callee.property, { name: "includes" })
-      ) {
-        callee.property.name = "indexOf";
-        path.replaceWith(t.binaryExpression("!==", node, t.numericLiteral(-1)));
-      }
-    }
-  }
-});

scripts/build/build.js

@@ -77,7 +77,6 @@ async function cacheFiles() {
 async function preparePackage() {
   const pkg = await util.readJson("package.json");
   pkg.bin = "./bin-prettier.js";
-  pkg.engines.node = ">=4";
   delete pkg.dependencies;
   delete pkg.devDependencies;
   pkg.scripts = {
@@ -99,7 +98,7 @@ async function run(params) {
     await execa("rm", ["-rf", ".cache"]);
   }
 
-  const bundleCache = new Cache(".cache/", "v19");
+  const bundleCache = new Cache(".cache/", "v20");
   await bundleCache.load();
 
   console.log(chalk.inverse(" Building packages "));

scripts/build/bundler.js

@@ -47,7 +47,7 @@ function getBabelConfig(bundle) {
       require.resolve("./babel-plugins/transform-custom-require")
     );
   }
-  const targets = { node: 4 };
+  const targets = { node: "10" };
   if (bundle.target === "universal") {
     // From https://jamie.build/last-2-versions
     targets.browsers = [">0.25%", "not ie 11", "not op_mini all"];

scripts/build/config.js

@@ -2,9 +2,6 @@
 
 const path = require("path");
 const PROJECT_ROOT = path.resolve(__dirname, "../..");
-const babelReplaceArrayIncludesWithIndexof = require.resolve(
-  "./babel-plugins/replace-array-includes-with-indexof"
-);
 
 /**
  * @typedef {Object} Bundle
@@ -29,8 +26,7 @@ const babelReplaceArrayIncludesWithIndexof = require.resolve(
 const parsers = [
   {
     input: "src/language-js/parser-babylon.js",
-    target: "universal",
-    babelPlugins: [babelReplaceArrayIncludesWithIndexof]
+    target: "universal"
   },
   {
     input: "src/language-js/parser-flow.js",
@@ -40,7 +36,6 @@ const parsers = [
   {
     input: "src/language-js/parser-typescript.js",
     target: "universal",
-    babelPlugins: [babelReplaceArrayIncludesWithIndexof],
     commonjs: {
       ignore: [
         // Optional package for TypeScript that logs ETW events (a Windows-only technology).
@@ -133,8 +128,7 @@ const parsers = [
           replacement: require.resolve("lines-and-columns")
         }
       ]
-    },
-    babelPlugins: [babelReplaceArrayIncludesWithIndexof]
+    }
   }
 ].map(parser => {
   const name = getFileOutput(parser)