mirror of
https://github.com/denoland/deno.git
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96 lines
3.2 KiB
TypeScript
96 lines
3.2 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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// This module is the entry point for "main" isolate, ie. the one
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// that is created when you run "deno" executable.
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//
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// It provides a single function that should be called by Rust:
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// - `bootstrapMainRuntime` - must be called once, when Isolate is created.
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// It sets up runtime by providing globals for `WindowScope` and adds `Deno` global.
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import * as Deno from "./deno.ts";
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import * as domTypes from "./web/dom_types.ts";
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import * as csprng from "./ops/get_random_values.ts";
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import {
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readOnly,
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writable,
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windowOrWorkerGlobalScopeMethods,
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windowOrWorkerGlobalScopeProperties,
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eventTargetProperties
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} from "./globals.ts";
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import { internalObject } from "./internals.ts";
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import { setSignals } from "./signals.ts";
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import { replLoop } from "./repl.ts";
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import { LocationImpl } from "./web/location.ts";
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import * as runtime from "./runtime.ts";
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import { symbols } from "./symbols.ts";
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import { log, immutableDefine } from "./util.ts";
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// TODO: factor out `Deno` global assignment to separate function
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// Add internal object to Deno object.
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// This is not exposed as part of the Deno types.
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// @ts-ignore
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Deno[symbols.internal] = internalObject;
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export const mainRuntimeGlobalProperties = {
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window: readOnly(globalThis),
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self: readOnly(globalThis),
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crypto: readOnly(csprng),
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// TODO(bartlomieju): from MDN docs (https://developer.mozilla.org/en-US/docs/Web/API/WorkerGlobalScope)
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// it seems those two properties should be availble to workers as well
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onload: writable(undefined),
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onunload: writable(undefined)
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};
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let hasBootstrapped = false;
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export function bootstrapMainRuntime(): void {
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if (hasBootstrapped) {
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throw new Error("Worker runtime already bootstrapped");
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}
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log("bootstrapMainRuntime");
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hasBootstrapped = true;
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Object.defineProperties(globalThis, windowOrWorkerGlobalScopeMethods);
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Object.defineProperties(globalThis, windowOrWorkerGlobalScopeProperties);
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Object.defineProperties(globalThis, eventTargetProperties);
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Object.defineProperties(globalThis, mainRuntimeGlobalProperties);
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// Registers the handler for window.onload function.
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globalThis.addEventListener("load", (e: domTypes.Event): void => {
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const { onload } = globalThis;
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if (typeof onload === "function") {
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onload(e);
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}
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});
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// Registers the handler for window.onunload function.
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globalThis.addEventListener("unload", (e: domTypes.Event): void => {
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const { onunload } = globalThis;
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if (typeof onunload === "function") {
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onunload(e);
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}
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});
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const s = runtime.start();
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const location = new LocationImpl(s.location);
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immutableDefine(globalThis, "location", location);
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Object.freeze(globalThis.location);
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Object.defineProperties(Deno, {
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pid: readOnly(s.pid),
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noColor: readOnly(s.noColor),
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args: readOnly(Object.freeze(s.args))
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});
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// Setup `Deno` global - we're actually overriding already
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// existing global `Deno` with `Deno` namespace from "./deno.ts".
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immutableDefine(globalThis, "Deno", Deno);
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Object.freeze(globalThis.Deno);
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Object.freeze(globalThis.Deno.core);
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Object.freeze(globalThis.Deno.core.sharedQueue);
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setSignals();
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log("cwd", s.cwd);
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log("args", Deno.args);
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if (s.repl) {
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replLoop();
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}
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}
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