import-meta-ponyfill
Version:
This library implements some standard interfaces of [import.meta](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/import.meta) with the aim of resolving the confusion caused by multiple standards in Node.js. It includes unified
173 lines (171 loc) • 7.47 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
var _a, _b, _c, _d;
Object.defineProperty(exports, "__esModule", { value: true });
exports.import_meta_ponyfill = exports.import_meta_ponyfill_esmodule = exports.import_meta_ponyfill_commonjs = void 0;
const node_module_1 = require("node:module");
const node_url_1 = require("node:url");
const node_path_1 = __importStar(require("node:path"));
const node_fs_1 = require("node:fs");
const pathResolve = (specifier, parentURL) => {
let baseUrl;
if (parentURL instanceof node_url_1.URL) {
baseUrl = parentURL;
}
else {
const parentHref = String(parentURL);
if (parentHref.startsWith("file:")) {
baseUrl = parentHref;
}
else {
baseUrl = (0, node_url_1.pathToFileURL)(parentHref).href;
}
}
return new node_url_1.URL(specifier, baseUrl).href;
};
exports.import_meta_ponyfill_commonjs = ((_a = globalThis)[_b = Symbol.for("import-meta-ponyfill-commonjs")] ?? (_a[_b] = (() => {
const moduleImportMetaWM = new WeakMap();
return (require, module) => {
let importMetaCache = moduleImportMetaWM.get(module);
if (importMetaCache == null) {
const importMeta = Object.assign(Object.create(null), {
url: (0, node_url_1.pathToFileURL)(module.filename).href,
main: require.main === module,
nodeResolve(specifier, parentURL = importMeta.url) {
return (0, node_url_1.pathToFileURL)((importMeta.url === parentURL
? require
: (0, node_module_1.createRequire)(parentURL)).resolve(specifier)).href;
},
resolve: function resolve(specifier, parentURL = importMeta.url) {
if (/^[./]*\/.*/.test(specifier)) {
return pathResolve(specifier, parentURL);
}
try {
return importMeta.nodeResolve(specifier, parentURL);
}
catch {
return pathResolve(specifier, parentURL);
}
},
filename: module.filename,
dirname: module.path,
});
moduleImportMetaWM.set(module, importMeta);
importMetaCache = importMeta;
}
return importMetaCache;
};
})()));
exports.import_meta_ponyfill = exports.import_meta_ponyfill_commonjs;
exports.import_meta_ponyfill_esmodule = ((_c = globalThis)[_d = Symbol.for("import-meta-ponyfill-esmodule")] ?? (_c[_d] = (() => {
const importMetaWM = new WeakMap();
return (im) => {
let importMetaCache = importMetaWM.get(im);
if (importMetaCache == null) {
const isMain = (filename) => {
try {
const entry = process.argv[1];
return (filename === entry || (0, node_fs_1.realpathSync)(filename) === (0, node_fs_1.realpathSync)(entry));
}
catch {
return false;
}
};
const resolveFunStr = String(im.resolve);
/**
* enable by --experimental-import-meta-resolve flag
* v20.6.0, v18.19.0
* No longer behind --experimental-import-meta-resolve CLI flag, except for the non-standard parentURL parameter.
*/
const isSupportResolve = // v16.2.0+, v14.18.0+: Add support for WHATWG URL object to parentURL parameter.
resolveFunStr !== "undefined" &&
/**
* v20.0.0, v18.19.0
* This API now returns a string synchronously instead of a Promise.
*/
!resolveFunStr.startsWith("async");
const filename = im.filename ?? (0, node_url_1.fileURLToPath)(im.url);
const dirname = im.dirname ?? (0, node_path_1.dirname)(filename);
/**
* v20.6.0, v18.19.0
* This API no longer throws when targeting file: URLs that do not map to an existing file on the local FS.
*/
let isSupportPathResolve = false;
if (isSupportResolve) {
try {
im.resolve(`./${Date.now()}${Math.random()}`);
isSupportPathResolve = true;
}
catch { }
}
let nodeResolve = isSupportResolve
? im.resolve
: (specifier, parentURL) => {
const importMetaUrlRequire = (0, node_module_1.createRequire)(im.url);
nodeResolve = (specifier, parentURL = im.url) => {
return (0, node_url_1.pathToFileURL)((importMeta.url === parentURL
? importMetaUrlRequire
: (0, node_module_1.createRequire)(parentURL)).resolve(specifier)).href;
};
return nodeResolve(specifier, parentURL);
};
let resolve = isSupportPathResolve
? im.resolve
: (specifier, parentURL) => {
if (/^[./]*\//.test(specifier) || node_path_1.default.isAbsolute(specifier)) {
return pathResolve(specifier, parentURL ?? im.url);
}
return nodeResolve(specifier, parentURL);
};
const importMeta = {
...im,
url: im.url,
main: im.main ?? isMain(filename),
filename,
dirname,
get nodeResolve() {
return nodeResolve;
},
resolve: resolve,
};
Object.setPrototypeOf(importMeta, null);
importMetaCache = importMeta;
importMetaWM.set(im, importMeta);
}
return importMetaCache;
};
})()));
exports.default = exports.import_meta_ponyfill_commonjs;
module.exports = Object.assign(exports.import_meta_ponyfill_commonjs, exports);