mirror of
https://github.com/Vendicated/Vencord.git
synced 2025-04-07 15:49:30 +00:00
585 lines
23 KiB
TypeScript
585 lines
23 KiB
TypeScript
/*
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* Vencord, a Discord client mod
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* Copyright (c) 2024 Vendicated, Nuckyz, and contributors
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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import { Settings } from "@api/Settings";
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import { makeLazy } from "@utils/lazy";
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import { Logger } from "@utils/Logger";
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import { interpolateIfDefined } from "@utils/misc";
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import { canonicalizeReplacement } from "@utils/patches";
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import { PatchReplacement } from "@utils/types";
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import { traceFunctionWithResults } from "../debug/Tracer";
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import { patches } from "../plugins";
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import { _initWebpack, _shouldIgnoreModule, AnyModuleFactory, AnyWebpackRequire, factoryListeners, findModuleId, MaybeWrappedModuleFactory, ModuleExports, moduleListeners, waitForSubscriptions, WebpackRequire, WrappedModuleFactory, wreq } from ".";
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export const SYM_ORIGINAL_FACTORY = Symbol("WebpackPatcher.originalFactory");
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export const SYM_PATCHED_SOURCE = Symbol("WebpackPatcher.patchedSource");
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export const SYM_PATCHED_BY = Symbol("WebpackPatcher.patchedBy");
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/** A set with all the Webpack instances */
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export const allWebpackInstances = new Set<AnyWebpackRequire>();
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export const patchTimings = [] as Array<[plugin: string, moduleId: PropertyKey, match: string | RegExp, totalTime: number]>;
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const logger = new Logger("WebpackInterceptor", "#8caaee");
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/** Whether we tried to fallback to factory WebpackRequire, or disabled patches */
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let wreqFallbackApplied = false;
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/** Whether we should be patching factories.
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*
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* This should be disabled if we start searching for the module to get the build number, and then resumed once it's done.
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* */
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let shouldPatchFactories = true;
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export const getBuildNumber = makeLazy(() => {
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try {
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shouldPatchFactories = false;
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try {
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if (wreq.m[128014]?.toString().includes("Trying to open a changelog for an invalid build number")) {
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const hardcodedGetBuildNumber = wreq(128014).b as () => number;
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if (typeof hardcodedGetBuildNumber === "function" && typeof hardcodedGetBuildNumber() === "number") {
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return hardcodedGetBuildNumber();
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}
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}
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} catch { }
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const moduleId = findModuleId("Trying to open a changelog for an invalid build number");
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if (moduleId == null) {
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return -1;
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}
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const exports = Object.values<ModuleExports>(wreq(moduleId));
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if (exports.length !== 1 || typeof exports[0] !== "function") {
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return -1;
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}
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const buildNumber = exports[0]();
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return typeof buildNumber === "number" ? buildNumber : -1;
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} catch {
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return -1;
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} finally {
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shouldPatchFactories = true;
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}
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});
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type Define = typeof Reflect.defineProperty;
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const define: Define = (target, p, attributes) => {
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if (Object.hasOwn(attributes, "value")) {
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attributes.writable = true;
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}
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return Reflect.defineProperty(target, p, {
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configurable: true,
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enumerable: true,
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...attributes
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});
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};
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export function getOriginalFactory(id: PropertyKey, webpackRequire = wreq as AnyWebpackRequire) {
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const moduleFactory = webpackRequire.m[id];
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return (moduleFactory?.[SYM_ORIGINAL_FACTORY] ?? moduleFactory) as AnyModuleFactory | undefined;
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}
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export function getFactoryPatchedSource(id: PropertyKey, webpackRequire = wreq as AnyWebpackRequire) {
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return webpackRequire.m[id]?.[SYM_PATCHED_SOURCE];
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}
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export function getFactoryPatchedBy(id: PropertyKey, webpackRequire = wreq as AnyWebpackRequire) {
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return webpackRequire.m[id]?.[SYM_PATCHED_BY];
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}
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// wreq.m is the Webpack object containing module factories. It is pre-populated with module factories, and is also populated via webpackGlobal.push
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// We use this setter to intercept when wreq.m is defined and apply the patching in its module factories.
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// We wrap wreq.m with our proxy, which is responsible for patching the module factories when they are set, or defining getters for the patched versions.
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// If this is the main Webpack, we also set up the internal references to WebpackRequire.
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define(Function.prototype, "m", {
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enumerable: false,
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set(this: AnyWebpackRequire, originalModules: AnyWebpackRequire["m"]) {
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define(this, "m", { value: originalModules });
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// Ensure this is one of Discord main Webpack instances.
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// We may catch Discord bundled libs, React Devtools or other extensions Webpack instances here.
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const { stack } = new Error();
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if (!stack?.includes("http") || stack.match(/at \d+? \(/) || !String(this).includes("exports:{}")) {
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return;
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}
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const fileName = stack.match(/\/assets\/(.+?\.js)/)?.[1];
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logger.info("Found Webpack module factories" + interpolateIfDefined` in ${fileName}`);
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allWebpackInstances.add(this);
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// Define a setter for the ensureChunk property of WebpackRequire. Only the main Webpack (which is the only that includes chunk loading) has this property.
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// So if the setter is called, this means we can initialize the internal references to WebpackRequire.
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define(this, "e", {
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enumerable: false,
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set(this: WebpackRequire, ensureChunk: WebpackRequire["e"]) {
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define(this, "e", { value: ensureChunk });
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clearTimeout(setterTimeout);
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logger.info("Main WebpackInstance found" + interpolateIfDefined` in ${fileName}` + ", initializing internal references to WebpackRequire");
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_initWebpack(this);
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}
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});
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// setImmediate to clear this property setter if this is not the main Webpack.
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// If this is the main Webpack, wreq.e will always be set before the timeout runs.
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const setterTimeout = setTimeout(() => Reflect.deleteProperty(this, "e"), 0);
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// Patch the pre-populated factories
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for (const id in originalModules) {
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if (updateExistingFactory(originalModules, id, originalModules[id], true)) {
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continue;
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}
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notifyFactoryListeners(originalModules[id]);
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defineModulesFactoryGetter(id, Settings.eagerPatches && shouldPatchFactories ? wrapAndPatchFactory(id, originalModules[id]) : originalModules[id]);
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}
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define(originalModules, Symbol.toStringTag, {
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value: "ModuleFactories",
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enumerable: false
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});
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// The proxy responsible for patching the module factories when they are set, or defining getters for the patched versions
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const proxiedModuleFactories = new Proxy(originalModules, moduleFactoriesHandler);
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/*
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If Webpack ever decides to set module factories using the variable of the modules object directly, instead of wreq.m, switch the proxy to the prototype
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Reflect.setPrototypeOf(originalModules, new Proxy(originalModules, moduleFactoriesHandler));
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*/
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define(this, "m", { value: proxiedModuleFactories });
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}
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});
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const moduleFactoriesHandler: ProxyHandler<AnyWebpackRequire["m"]> = {
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/*
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If Webpack ever decides to set module factories using the variable of the modules object directly instead of wreq.m, we need to switch the proxy to the prototype
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and that requires defining additional traps for keeping the object working
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// Proxies on the prototype don't intercept "get" when the property is in the object itself. But in case it isn't we need to return undefined,
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// to avoid Reflect.get having no effect and causing a stack overflow
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get(target, p, receiver) {
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return undefined;
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},
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// Same thing as get
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has(target, p) {
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return false;
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},
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*/
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// The set trap for patching or defining getters for the module factories when new module factories are loaded
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set(target, p, newValue, receiver) {
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if (updateExistingFactory(target, p, newValue)) {
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return true;
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}
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notifyFactoryListeners(newValue);
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defineModulesFactoryGetter(p, Settings.eagerPatches && shouldPatchFactories ? wrapAndPatchFactory(p, newValue) : newValue);
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return true;
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}
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};
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/**
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* Update a factory that exists in any Webpack instance with a new original factory.
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*
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* @target The module factories where this new original factory is being set
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* @param id The id of the module
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* @param newFactory The new original factory
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* @param ignoreExistingInTarget Whether to ignore checking if the factory already exists in the moduleFactoriesTarget
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* @returns Whether the original factory was updated, or false if it doesn't exist in any Webpack instance
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*/
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function updateExistingFactory(moduleFactoriesTarget: AnyWebpackRequire["m"], id: PropertyKey, newFactory: AnyModuleFactory, ignoreExistingInTarget: boolean = false) {
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let existingFactory: TypedPropertyDescriptor<AnyModuleFactory> | undefined;
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let moduleFactoriesWithFactory: AnyWebpackRequire["m"] | undefined;
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for (const wreq of allWebpackInstances) {
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if (ignoreExistingInTarget && wreq.m === moduleFactoriesTarget) continue;
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if (Object.hasOwn(wreq.m, id)) {
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existingFactory = Reflect.getOwnPropertyDescriptor(wreq.m, id);
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moduleFactoriesWithFactory = wreq.m;
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break;
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}
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}
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if (existingFactory != null) {
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// If existingFactory exists in any Webpack instance, it's either wrapped in defineModuleFactoryGetter, or it has already been required.
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// So define the descriptor of it on this current Webpack instance (if it doesn't exist already), call Reflect.set with the new original,
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// and let the correct logic apply (normal set, or defineModuleFactoryGetter setter)
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if (moduleFactoriesWithFactory !== moduleFactoriesTarget) {
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Reflect.defineProperty(moduleFactoriesTarget, id, existingFactory);
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}
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// Persist patched source and patched by in the new original factory, if the patched one has already been required
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if (IS_DEV && existingFactory.value != null) {
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newFactory[SYM_PATCHED_SOURCE] = existingFactory.value[SYM_PATCHED_SOURCE];
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newFactory[SYM_PATCHED_BY] = existingFactory.value[SYM_PATCHED_BY];
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}
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return Reflect.set(moduleFactoriesTarget, id, newFactory, moduleFactoriesTarget);
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}
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return false;
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}
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/**
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* Notify all factory listeners.
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*
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* @param factory The original factory to notify for
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*/
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function notifyFactoryListeners(factory: AnyModuleFactory) {
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for (const factoryListener of factoryListeners) {
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try {
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factoryListener(factory);
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} catch (err) {
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logger.error("Error in Webpack factory listener:\n", err, factoryListener);
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}
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}
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}
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/**
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* Define the getter for returning the patched version of the module factory.
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*
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* If eagerPatches is enabled, the factory argument should already be the patched version, else it will be the original
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* and only be patched when accessed for the first time.
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*
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* @param id The id of the module
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* @param factory The original or patched module factory
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*/
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function defineModulesFactoryGetter(id: PropertyKey, factory: MaybeWrappedModuleFactory) {
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const descriptor: PropertyDescriptor = {
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get() {
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// SYM_ORIGINAL_FACTORY means the factory is already patched
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if (!shouldPatchFactories || factory[SYM_ORIGINAL_FACTORY] != null) {
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return factory;
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}
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return (factory = wrapAndPatchFactory(id, factory));
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},
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set(newFactory: MaybeWrappedModuleFactory) {
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if (IS_DEV) {
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newFactory[SYM_PATCHED_SOURCE] = factory[SYM_PATCHED_SOURCE];
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newFactory[SYM_PATCHED_BY] = factory[SYM_PATCHED_BY];
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}
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if (factory[SYM_ORIGINAL_FACTORY] != null) {
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factory.toString = newFactory.toString.bind(newFactory);
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factory[SYM_ORIGINAL_FACTORY] = newFactory;
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} else {
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factory = newFactory;
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}
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}
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};
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// Define the getter in all the module factories objects. Patches are only executed once, so make sure all module factories object
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// have the patched version
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for (const wreq of allWebpackInstances) {
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define(wreq.m, id, descriptor);
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}
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}
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/**
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* Wraps and patches a module factory.
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*
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* @param id The id of the module
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* @param factory The original or patched module factory
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* @returns The wrapper for the patched module factory
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*/
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function wrapAndPatchFactory(id: PropertyKey, originalFactory: AnyModuleFactory) {
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const [patchedFactory, patchedSource, patchedBy] = patchFactory(id, originalFactory);
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const wrappedFactory: WrappedModuleFactory = function (...args) {
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// Restore the original factory in all the module factories objects. We want to make sure the original factory is restored properly, no matter what is the Webpack instance
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for (const wreq of allWebpackInstances) {
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define(wreq.m, id, { value: wrappedFactory[SYM_ORIGINAL_FACTORY] });
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}
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// eslint-disable-next-line prefer-const
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let [module, exports, require] = args;
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if (wreq == null) {
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if (!wreqFallbackApplied) {
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wreqFallbackApplied = true;
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// Make sure the require argument is actually the WebpackRequire function
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if (typeof require === "function" && require.m != null) {
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const { stack } = new Error();
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const webpackInstanceFileName = stack?.match(/\/assets\/(.+?\.js)/)?.[1];
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logger.warn(
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"WebpackRequire was not initialized, falling back to WebpackRequire passed to the first called patched module factory (" +
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`id: ${String(id)}` + interpolateIfDefined`, WebpackInstance origin: ${webpackInstanceFileName}` +
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")"
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);
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_initWebpack(require as WebpackRequire);
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} else if (IS_DEV) {
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logger.error("WebpackRequire was not initialized, running modules without patches instead.");
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return wrappedFactory[SYM_ORIGINAL_FACTORY].apply(this, args);
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}
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} else if (IS_DEV) {
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return wrappedFactory[SYM_ORIGINAL_FACTORY].apply(this, args);
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}
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}
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let factoryReturn: unknown;
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try {
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// Call the patched factory
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factoryReturn = patchedFactory.apply(this, args);
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} catch (err) {
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// Just re-throw Discord errors
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if (patchedFactory === wrappedFactory[SYM_ORIGINAL_FACTORY]) {
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throw err;
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}
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logger.error("Error in patched module factory:\n", err);
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return wrappedFactory[SYM_ORIGINAL_FACTORY].apply(this, args);
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}
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exports = module.exports;
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if (exports == null) {
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return factoryReturn;
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}
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if (typeof require === "function") {
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const shouldIgnoreModule = _shouldIgnoreModule(exports);
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if (shouldIgnoreModule) {
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if (require.c != null) {
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Object.defineProperty(require.c, id, {
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value: require.c[id],
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enumerable: false,
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configurable: true,
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writable: true
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});
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}
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return factoryReturn;
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}
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}
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for (const callback of moduleListeners) {
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try {
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callback(exports, id);
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} catch (err) {
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logger.error("Error in Webpack module listener:\n", err, callback);
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}
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}
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for (const [filter, callback] of waitForSubscriptions) {
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try {
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if (filter(exports)) {
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waitForSubscriptions.delete(filter);
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callback(exports, id);
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continue;
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}
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if (typeof exports !== "object") {
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continue;
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}
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for (const exportKey in exports) {
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const exportValue = exports[exportKey];
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if (exportValue != null && filter(exportValue)) {
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waitForSubscriptions.delete(filter);
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callback(exportValue, id);
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break;
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}
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}
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} catch (err) {
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logger.error("Error while firing callback for Webpack waitFor subscription:\n", err, filter, callback);
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}
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}
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return factoryReturn;
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};
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wrappedFactory.toString = originalFactory.toString.bind(originalFactory);
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wrappedFactory[SYM_ORIGINAL_FACTORY] = originalFactory;
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if (IS_DEV && patchedFactory !== originalFactory) {
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wrappedFactory[SYM_PATCHED_SOURCE] = patchedSource;
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wrappedFactory[SYM_PATCHED_BY] = patchedBy;
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originalFactory[SYM_PATCHED_SOURCE] = patchedSource;
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originalFactory[SYM_PATCHED_BY] = patchedBy;
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}
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// @ts-expect-error Allow GC to get into action, if possible
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originalFactory = undefined;
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return wrappedFactory;
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}
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/**
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* Patches a module factory.
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*
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* @param id The id of the module
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* @param factory The original module factory
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* @returns The patched module factory, the patched source of it, and the plugins that patched it
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*/
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function patchFactory(id: PropertyKey, factory: AnyModuleFactory): [patchedFactory: AnyModuleFactory, patchedSource: string, patchedBy: Set<string>] {
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// 0, prefix to turn it into an expression: 0,function(){} would be invalid syntax without the 0,
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let code: string = "0," + String(factory);
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let patchedSource = code;
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let patchedFactory = factory;
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const patchedBy = new Set<string>();
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for (let i = 0; i < patches.length; i++) {
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const patch = patches[i];
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const moduleMatches = typeof patch.find === "string"
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? code.includes(patch.find)
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: (patch.find.global && (patch.find.lastIndex = 0), patch.find.test(code));
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if (!moduleMatches) {
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continue;
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}
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const buildNumber = getBuildNumber();
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const shouldCheckBuildId = !Settings.eagerPatches && buildNumber !== -1;
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if (
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shouldCheckBuildId &&
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(patch.fromBuild != null && buildNumber < patch.fromBuild) ||
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(patch.toBuild != null && buildNumber > patch.toBuild)
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) {
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continue;
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}
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const executePatch = traceFunctionWithResults(`patch by ${patch.plugin}`, (match: string | RegExp, replace: string) => {
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if (typeof match !== "string" && match.global) {
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match.lastIndex = 0;
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}
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return code.replace(match, replace);
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});
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const previousCode = code;
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const previousFactory = factory;
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let markedAsPatched = false;
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// We change all patch.replacement to array in plugins/index
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for (const replacement of patch.replacement as PatchReplacement[]) {
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if (
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shouldCheckBuildId &&
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(replacement.fromBuild != null && buildNumber < replacement.fromBuild) ||
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(replacement.toBuild != null && buildNumber > replacement.toBuild)
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) {
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continue;
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}
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// TODO: remove once Vesktop has been updated to use addPatch
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if (patch.plugin === "Vesktop") {
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canonicalizeReplacement(replacement, "VCDP");
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}
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const lastCode = code;
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const lastFactory = factory;
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try {
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const [newCode, totalTime] = executePatch(replacement.match, replacement.replace as string);
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if (IS_REPORTER) {
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patchTimings.push([patch.plugin, id, replacement.match, totalTime]);
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}
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if (newCode === code) {
|
|
if (!patch.noWarn) {
|
|
logger.warn(`Patch by ${patch.plugin} had no effect (Module id is ${String(id)}): ${replacement.match}`);
|
|
if (IS_DEV) {
|
|
logger.debug("Function Source:\n", code);
|
|
}
|
|
}
|
|
|
|
if (patch.group) {
|
|
logger.warn(`Undoing patch group ${patch.find} by ${patch.plugin} because replacement ${replacement.match} had no effect`);
|
|
code = previousCode;
|
|
patchedFactory = previousFactory;
|
|
|
|
if (markedAsPatched) {
|
|
patchedBy.delete(patch.plugin);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
code = newCode;
|
|
patchedSource = `// Webpack Module ${String(id)} - Patched by ${[...patchedBy, patch.plugin].join(", ")}\n${newCode}\n//# sourceURL=WebpackModule${String(id)}`;
|
|
patchedFactory = (0, eval)(patchedSource);
|
|
|
|
if (!patchedBy.has(patch.plugin)) {
|
|
patchedBy.add(patch.plugin);
|
|
markedAsPatched = true;
|
|
}
|
|
} catch (err) {
|
|
logger.error(`Patch by ${patch.plugin} errored (Module id is ${String(id)}): ${replacement.match}\n`, err);
|
|
|
|
if (IS_DEV) {
|
|
diffErroredPatch(code, lastCode, lastCode.match(replacement.match)!);
|
|
}
|
|
|
|
if (markedAsPatched) {
|
|
patchedBy.delete(patch.plugin);
|
|
}
|
|
|
|
if (patch.group) {
|
|
logger.warn(`Undoing patch group ${patch.find} by ${patch.plugin} because replacement ${replacement.match} errored`);
|
|
code = previousCode;
|
|
patchedFactory = previousFactory;
|
|
break;
|
|
}
|
|
|
|
code = lastCode;
|
|
patchedFactory = lastFactory;
|
|
}
|
|
}
|
|
|
|
if (!patch.all) {
|
|
patches.splice(i--, 1);
|
|
}
|
|
}
|
|
|
|
return [patchedFactory, patchedSource, patchedBy];
|
|
}
|
|
|
|
function diffErroredPatch(code: string, lastCode: string, match: RegExpMatchArray) {
|
|
const changeSize = code.length - lastCode.length;
|
|
|
|
// Use 200 surrounding characters of context
|
|
const start = Math.max(0, match.index! - 200);
|
|
const end = Math.min(lastCode.length, match.index! + match[0].length + 200);
|
|
// (changeSize may be negative)
|
|
const endPatched = end + changeSize;
|
|
|
|
const context = lastCode.slice(start, end);
|
|
const patchedContext = code.slice(start, endPatched);
|
|
|
|
// Inline require to avoid including it in !IS_DEV builds
|
|
const diff = (require("diff") as typeof import("diff")).diffWordsWithSpace(context, patchedContext);
|
|
let fmt = "%c %s ";
|
|
const elements: string[] = [];
|
|
for (const d of diff) {
|
|
const color = d.removed
|
|
? "red"
|
|
: d.added
|
|
? "lime"
|
|
: "grey";
|
|
fmt += "%c%s";
|
|
elements.push("color:" + color, d.value);
|
|
}
|
|
|
|
logger.errorCustomFmt(...Logger.makeTitle("white", "Before"), context);
|
|
logger.errorCustomFmt(...Logger.makeTitle("white", "After"), patchedContext);
|
|
const [titleFmt, ...titleElements] = Logger.makeTitle("white", "Diff");
|
|
logger.errorCustomFmt(titleFmt + fmt, ...titleElements, ...elements);
|
|
}
|