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817ffab754
Refactor bootstrap.js and bootstrap_helper.js to be able to deal with generator chunks. In particular for each chunk, specify: - The goog.module ID to goog.require() in uncompressed mode. - The script filename to load in compressed mode. - Where the chunk's UMD wrapper will save the export object when loaded as a script. - What global variable the chunk's export object should be saved in (if desired). - Any individual named exports to destructure to global variables. This allows the bootstrap scripts to be slightly simpler while also being more flexible.
57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
/**
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* @license
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* Copyright 2022 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @fileoverview Helper script for bootstrap.js
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*
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* This is loaded, via goog.bootstrap(), after the other top-level
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* Blockly modules. It simply calls goog.require() for each of them,
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* to force the debug module loader to finish loading them before any
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* non-module scripts (like msg/en.js) that might have
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* undeclared dependencies on them.
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*/
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(function () {
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const info = window.bootstrapInfo;
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if (!info.compressed) {
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// Force debug module loader to finish loading all modules.
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for (const require of info.requires) {
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goog.require(require);
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}
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}
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// Create global names for named and destructured imports.
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for (const module of info.modules) {
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const exports = info.compressed
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? get(module.scriptExport)
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: goog.module.get(module.id);
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if (module.importAt) {
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window[module.importAt] = exports;
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}
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for (const location in module.destructure) {
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window[location] = exports[module.destructure[location]];
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}
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}
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return; // All done. Only helper functions after this point.
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/**
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* Get the object referred to by a doted-itentifier path
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* (e.g. foo.bar.baz).
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* @param {string} path The path referring to the object.
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* @return {string|null} The object, or null if not found.
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*/
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function get(path) {
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let obj = window;
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for (const part of path.split('.')) {
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obj = obj[part];
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if (!obj) return null;
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}
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return obj;
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}
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})();
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