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114 lines
3.3 KiB
114 lines
3.3 KiB
var dartNodeIsActuallyNode = typeof process !== "undefined" && (process.versions || {}).hasOwnProperty('node');
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// make sure to keep this as 'var'
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// we don't want block scoping
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var self = dartNodeIsActuallyNode ? Object.create(globalThis) : globalThis;
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self.scheduleImmediate = typeof setImmediate !== "undefined"
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? function (cb) {
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setImmediate(cb);
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}
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: function(cb) {
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setTimeout(cb, 0);
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};
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// CommonJS globals.
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if (typeof require !== "undefined") {
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self.require = require;
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}
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if (typeof exports !== "undefined") {
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self.exports = exports;
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}
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// Node.js specific exports, check to see if they exist & or polyfilled
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if (typeof process !== "undefined") {
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self.process = process;
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}
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if (typeof __dirname !== "undefined") {
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self.__dirname = __dirname;
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}
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if (typeof __filename !== "undefined") {
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self.__filename = __filename;
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}
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if (typeof Buffer !== "undefined") {
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self.Buffer = Buffer;
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}
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// if we're running in a browser, Dart supports most of this out of box
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// make sure we only run these in Node.js environment
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if (dartNodeIsActuallyNode) {
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// This line is to:
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// 1) Prevent Webpack from bundling.
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// 2) In Webpack on Node.js, make sure we're using the native Node.js require, which is available via __non_webpack_require__
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// https://github.com/mbullington/node_preamble.dart/issues/18#issuecomment-527305561
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var url = ("undefined" !== typeof __webpack_require__ ? __non_webpack_require__ : require)("url");
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// Setting `self.location=` in Electron throws a `TypeError`, so we define it
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// as a property instead to be safe.
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Object.defineProperty(self, "location", {
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value: {
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get href() {
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if (url.pathToFileURL) {
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return url.pathToFileURL(process.cwd()).href + "/";
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} else {
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// This isn't really a correct transformation, but it's the best we have
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// for versions of Node <10.12.0 which introduced `url.pathToFileURL()`.
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// For example, it will fail for paths that contain characters that need
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// to be escaped in URLs.
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return "file://" + (function() {
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var cwd = process.cwd();
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if (process.platform != "win32") return cwd;
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return "/" + cwd.replace(/\\/g, "/");
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})() + "/"
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}
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}
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}
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});
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(function() {
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function computeCurrentScript() {
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try {
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throw new Error();
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} catch(e) {
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var stack = e.stack;
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var re = new RegExp("^ *at [^(]*\\((.*):[0-9]*:[0-9]*\\)$", "mg");
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var lastMatch = null;
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do {
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var match = re.exec(stack);
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if (match != null) lastMatch = match;
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} while (match != null);
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return lastMatch[1];
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}
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}
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// Setting `self.document=` isn't known to throw an error anywhere like
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// `self.location=` does on Electron, but it's better to be future-proof
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// just in case..
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var cachedCurrentScript = null;
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Object.defineProperty(self, "document", {
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value: {
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get currentScript() {
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if (cachedCurrentScript == null) {
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cachedCurrentScript = {src: computeCurrentScript()};
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}
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return cachedCurrentScript;
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}
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}
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});
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})();
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self.dartDeferredLibraryLoader = function(uri, successCallback, errorCallback) {
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try {
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load(uri);
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successCallback();
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} catch (error) {
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errorCallback(error);
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}
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};
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}
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