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348 lines
11 KiB
348 lines
11 KiB
/* |
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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} 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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*/ |
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///** @typedef {PlatformTargetProperties | ApiTargetProperties | EcmaTargetProperties | PlatformTargetProperties & ApiTargetProperties | PlatformTargetProperties & EcmaTargetProperties | ApiTargetProperties & EcmaTargetProperties} TargetProperties */ |
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/** @template T @typedef {{ [P in keyof T]?: never }} Never<T> */ |
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/** @template A @template B @typedef {(A & Never<B>) | (Never<A> & B) | (A & B)} Mix<A,B> */ |
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/** @typedef {Mix<Mix<PlatformTargetProperties, ElectronContextTargetProperties>, Mix<ApiTargetProperties, EcmaTargetProperties>>} TargetProperties */ |
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const versionDependent = (major, minor) => { |
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if (!major) return () => /** @type {undefined} */ (undefined); |
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major = +major; |
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minor = minor ? +minor : 0; |
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return (vMajor, vMinor = 0) => { |
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return major > vMajor || (major === vMajor && minor >= vMinor); |
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}; |
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}; |
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/** @type {[string, string, RegExp, (...args: string[]) => TargetProperties | false][]} */ |
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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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return { |
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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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[ |
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"webworker", |
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"Web Worker, SharedWorker or Service Worker.", |
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/^webworker$/, |
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() => { |
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return { |
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web: true, |
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browser: true, |
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webworker: true, |
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node: false, |
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electron: false, |
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nwjs: false, |
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importScripts: true, |
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importScriptsInWorker: true, |
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fetchWasm: true, |
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nodeBuiltins: false, |
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require: false, |
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document: false, |
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global: false |
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}; |
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} |
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], |
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[ |
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"[async-]node[X[.Y]]", |
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"Node.js in version X.Y. The 'async-' prefix will load chunks asynchronously via 'fs' and 'vm' instead of 'require()'. Examples: node14.5, async-node10.", |
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/^(async-)?node(\d+(?:\.(\d+))?)?$/, |
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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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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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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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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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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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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 = +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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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 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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const mergeTargetProperties = 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(key); |
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} |
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} |
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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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result[key] = hasFalse && hasTrue ? null : hasTrue ? true : false; |
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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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return mergeTargetProperties( |
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targets.map(t => getTargetProperties(t, context)) |
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); |
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}; |
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exports.getDefaultTarget = getDefaultTarget; |
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exports.getTargetProperties = getTargetProperties; |
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exports.getTargetsProperties = getTargetsProperties;
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