378 lines
12 KiB
JavaScript
378 lines
12 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const memoize = require("../util/memoize");
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const getBrowserslistTargetHandler = memoize(() =>
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require("./browserslistTargetHandler")
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);
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/**
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* @param {string} context the context directory
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* @returns {string} default target
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*/
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const getDefaultTarget = context => {
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const browsers = getBrowserslistTargetHandler().load(null, context);
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return browsers ? "browserslist" : "web";
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};
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/**
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* @typedef {object} PlatformTargetProperties
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* @property {boolean | null} web web platform, importing of http(s) and std: is available
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* @property {boolean | null} browser browser platform, running in a normal web browser
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* @property {boolean | null} webworker (Web)Worker platform, running in a web/shared/service worker
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* @property {boolean | null} node node platform, require of node built-in modules is available
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* @property {boolean | null} nwjs nwjs platform, require of legacy nw.gui is available
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* @property {boolean | null} electron electron platform, require of some electron built-in modules is available
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*/
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/**
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* @typedef {object} ElectronContextTargetProperties
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* @property {boolean | null} electronMain in main context
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* @property {boolean | null} electronPreload in preload context
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* @property {boolean | null} electronRenderer in renderer context with node integration
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*/
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/**
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* @typedef {object} ApiTargetProperties
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* @property {boolean | null} require has require function available
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* @property {boolean | null} nodeBuiltins has node.js built-in modules available
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* @property {boolean | null} nodePrefixForCoreModules node.js allows to use `node:` prefix for core modules
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* @property {boolean | null} document has document available (allows script tags)
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* @property {boolean | null} importScripts has importScripts available
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* @property {boolean | null} importScriptsInWorker has importScripts available when creating a worker
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* @property {boolean | null} fetchWasm has fetch function available for WebAssembly
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* @property {boolean | null} global has global variable available
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*/
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/**
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* @typedef {object} EcmaTargetProperties
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* @property {boolean | null} globalThis has globalThis variable available
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* @property {boolean | null} bigIntLiteral big int literal syntax is available
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* @property {boolean | null} const const and let variable declarations are available
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* @property {boolean | null} arrowFunction arrow functions are available
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* @property {boolean | null} forOf for of iteration is available
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* @property {boolean | null} destructuring destructuring is available
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* @property {boolean | null} dynamicImport async import() is available
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* @property {boolean | null} dynamicImportInWorker async import() is available when creating a worker
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* @property {boolean | null} module ESM syntax is available (when in module)
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* @property {boolean | null} optionalChaining optional chaining is available
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* @property {boolean | null} templateLiteral template literal is available
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* @property {boolean | null} asyncFunction async functions and await are available
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*/
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/**
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* @template T
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* @typedef {{ [P in keyof T]?: never }} Never<T>
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*/
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/**
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* @template A
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* @template B
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* @typedef {(A & Never<B>) | (Never<A> & B) | (A & B)} Mix<A, B>
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*/
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/** @typedef {Mix<Mix<PlatformTargetProperties, ElectronContextTargetProperties>, Mix<ApiTargetProperties, EcmaTargetProperties>>} TargetProperties */
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/**
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* @param {string} major major version
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* @param {string | undefined} minor minor version
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* @returns {(vMajor: number, vMinor?: number) => boolean | undefined} check if version is greater or equal
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*/
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const versionDependent = (major, minor) => {
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if (!major) {
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return () => /** @type {undefined} */ (undefined);
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}
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/** @type {number} */
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const nMajor = Number(major);
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/** @type {number} */
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const nMinor = minor ? Number(minor) : 0;
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return (vMajor, vMinor = 0) =>
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nMajor > vMajor || (nMajor === vMajor && nMinor >= vMinor);
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};
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/** @type {[string, string, RegExp, (...args: string[]) => Partial<TargetProperties>][]} */
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const TARGETS = [
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[
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"browserslist / browserslist:env / browserslist:query / browserslist:path-to-config / browserslist:path-to-config:env",
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"Resolve features from browserslist. Will resolve browserslist config automatically. Only browser or node queries are supported (electron is not supported). Examples: 'browserslist:modern' to use 'modern' environment from browserslist config",
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/^browserslist(?::(.+))?$/,
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(rest, context) => {
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const browserslistTargetHandler = getBrowserslistTargetHandler();
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const browsers = browserslistTargetHandler.load(
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rest ? rest.trim() : null,
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context
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);
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if (!browsers) {
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throw new Error(`No browserslist config found to handle the 'browserslist' target.
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See https://github.com/browserslist/browserslist#queries for possible ways to provide a config.
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The recommended way is to add a 'browserslist' key to your package.json and list supported browsers (resp. node.js versions).
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You can also more options via the 'target' option: 'browserslist' / 'browserslist:env' / 'browserslist:query' / 'browserslist:path-to-config' / 'browserslist:path-to-config:env'`);
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}
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return browserslistTargetHandler.resolve(browsers);
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}
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],
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[
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"web",
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"Web browser.",
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/^web$/,
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() => ({
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web: true,
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browser: true,
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webworker: null,
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node: false,
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electron: false,
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nwjs: false,
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document: true,
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importScriptsInWorker: true,
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fetchWasm: true,
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nodeBuiltins: false,
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importScripts: false,
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require: false,
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global: false
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})
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],
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[
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"webworker",
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"Web Worker, SharedWorker or Service Worker.",
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/^webworker$/,
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() => ({
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web: true,
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browser: true,
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webworker: true,
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node: false,
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electron: false,
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nwjs: false,
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importScripts: true,
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importScriptsInWorker: true,
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fetchWasm: true,
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nodeBuiltins: false,
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require: false,
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document: false,
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global: false
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})
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],
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[
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"[async-]node[X[.Y]]",
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"Node.js in version X.Y. The 'async-' prefix will load chunks asynchronously via 'fs' and 'vm' instead of 'require()'. Examples: node14.5, async-node10.",
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/^(async-)?node((\d+)(?:\.(\d+))?)?$/,
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(asyncFlag, _, major, minor) => {
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const v = versionDependent(major, minor);
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// see https://node.green/
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return {
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node: true,
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electron: false,
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nwjs: false,
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web: false,
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webworker: false,
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browser: false,
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require: !asyncFlag,
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nodeBuiltins: true,
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// v16.0.0, v14.18.0
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nodePrefixForCoreModules: Number(major) < 15 ? v(14, 18) : v(16),
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global: true,
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document: false,
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fetchWasm: false,
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importScripts: false,
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importScriptsInWorker: false,
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globalThis: v(12),
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const: v(6),
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templateLiteral: v(4),
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optionalChaining: v(14),
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arrowFunction: v(6),
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asyncFunction: v(7, 6),
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forOf: v(5),
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destructuring: v(6),
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bigIntLiteral: v(10, 4),
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dynamicImport: v(12, 17),
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dynamicImportInWorker: major ? false : undefined,
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module: v(12, 17)
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};
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}
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],
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[
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"electron[X[.Y]]-main/preload/renderer",
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"Electron in version X.Y. Script is running in main, preload resp. renderer context.",
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/^electron((\d+)(?:\.(\d+))?)?-(main|preload|renderer)$/,
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(_, major, minor, context) => {
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const v = versionDependent(major, minor);
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// see https://node.green/ + https://github.com/electron/releases
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return {
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node: true,
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electron: true,
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web: context !== "main",
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webworker: false,
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browser: false,
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nwjs: false,
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electronMain: context === "main",
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electronPreload: context === "preload",
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electronRenderer: context === "renderer",
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global: true,
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nodeBuiltins: true,
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// 15.0.0 - Node.js v16.5
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// 14.0.0 - Mode.js v14.17, but prefixes only since v14.18
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nodePrefixForCoreModules: v(15),
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require: true,
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document: context === "renderer",
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fetchWasm: context === "renderer",
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importScripts: false,
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importScriptsInWorker: true,
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globalThis: v(5),
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const: v(1, 1),
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templateLiteral: v(1, 1),
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optionalChaining: v(8),
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arrowFunction: v(1, 1),
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asyncFunction: v(1, 7),
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forOf: v(0, 36),
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destructuring: v(1, 1),
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bigIntLiteral: v(4),
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dynamicImport: v(11),
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dynamicImportInWorker: major ? false : undefined,
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module: v(11)
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};
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}
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],
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[
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"nwjs[X[.Y]] / node-webkit[X[.Y]]",
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"NW.js in version X.Y.",
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/^(?:nwjs|node-webkit)((\d+)(?:\.(\d+))?)?$/,
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(_, major, minor) => {
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const v = versionDependent(major, minor);
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// see https://node.green/ + https://github.com/nwjs/nw.js/blob/nw48/CHANGELOG.md
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return {
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node: true,
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web: true,
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nwjs: true,
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webworker: null,
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browser: false,
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electron: false,
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global: true,
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nodeBuiltins: true,
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document: false,
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importScriptsInWorker: false,
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fetchWasm: false,
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importScripts: false,
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require: false,
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globalThis: v(0, 43),
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const: v(0, 15),
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templateLiteral: v(0, 13),
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optionalChaining: v(0, 44),
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arrowFunction: v(0, 15),
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asyncFunction: v(0, 21),
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forOf: v(0, 13),
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destructuring: v(0, 15),
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bigIntLiteral: v(0, 32),
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dynamicImport: v(0, 43),
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dynamicImportInWorker: major ? false : undefined,
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module: v(0, 43)
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};
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}
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],
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[
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"esX",
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"EcmaScript in this version. Examples: es2020, es5.",
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/^es(\d+)$/,
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version => {
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let v = Number(version);
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if (v < 1000) v = v + 2009;
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return {
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const: v >= 2015,
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templateLiteral: v >= 2015,
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optionalChaining: v >= 2020,
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arrowFunction: v >= 2015,
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forOf: v >= 2015,
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destructuring: v >= 2015,
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module: v >= 2015,
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asyncFunction: v >= 2017,
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globalThis: v >= 2020,
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bigIntLiteral: v >= 2020,
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dynamicImport: v >= 2020,
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dynamicImportInWorker: v >= 2020
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};
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}
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]
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];
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/**
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* @param {string} target the target
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* @param {string} context the context directory
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* @returns {TargetProperties} target properties
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*/
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const getTargetProperties = (target, context) => {
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for (const [, , regExp, handler] of TARGETS) {
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const match = regExp.exec(target);
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if (match) {
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const [, ...args] = match;
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const result = handler(...args, context);
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if (result) return /** @type {TargetProperties} */ (result);
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}
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}
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throw new Error(
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`Unknown target '${target}'. The following targets are supported:\n${TARGETS.map(
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([name, description]) => `* ${name}: ${description}`
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).join("\n")}`
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);
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};
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/**
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* @param {TargetProperties[]} targetProperties array of target properties
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* @returns {TargetProperties} merged target properties
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*/
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const mergeTargetProperties = targetProperties => {
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/** @type {Set<keyof TargetProperties>} */
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const keys = new Set();
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for (const tp of targetProperties) {
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for (const key of Object.keys(tp)) {
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keys.add(/** @type {keyof TargetProperties} */ (key));
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}
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}
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/** @type {object} */
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const result = {};
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for (const key of keys) {
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let hasTrue = false;
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let hasFalse = false;
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for (const tp of targetProperties) {
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const value = tp[key];
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switch (value) {
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case true:
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hasTrue = true;
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break;
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case false:
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hasFalse = true;
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break;
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}
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}
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if (hasTrue || hasFalse)
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/** @type {TargetProperties} */
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(result)[key] = hasFalse && hasTrue ? null : Boolean(hasTrue);
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}
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return /** @type {TargetProperties} */ (result);
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};
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/**
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* @param {string[]} targets the targets
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* @param {string} context the context directory
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* @returns {TargetProperties} target properties
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*/
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const getTargetsProperties = (targets, context) =>
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mergeTargetProperties(targets.map(t => getTargetProperties(t, context)));
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module.exports.getDefaultTarget = getDefaultTarget;
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module.exports.getTargetProperties = getTargetProperties;
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module.exports.getTargetsProperties = getTargetsProperties;
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