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Code Issues Projects Releases Packages Wiki Activity Actions 5

refactor(Webpack): more reliable patching (#2237)

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Nuckyz 2024-05-02 18:52:41 -03:00 • committed by GitHub
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8 changed files with 443 additions and 302 deletions
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49
src/plugins/index.ts
View file

@ -34,6 +34,9 @@ export const PMLogger = logger;
export const plugins = Plugins;
export const patches = [] as Patch[];
/** Whether we have subscribed to flux events of all the enabled plugins when FluxDispatcher was ready */
let enabledPluginsSubscribedFlux = false;
const settings = Settings.plugins;
export function isPluginEnabled(p: string) {
@ -119,6 +122,33 @@ export function startDependenciesRecursive(p: Plugin) {
return { restartNeeded, failures };
}
export function subscribePluginFluxEvents(p: Plugin, fluxDispatcher: typeof FluxDispatcher) {
if (p.flux) {
logger.debug("Subscribing to flux events of plugin", p.name);
for (const [event, handler] of Object.entries(p.flux)) {
fluxDispatcher.subscribe(event as FluxEvents, handler);
}
}
}
export function unsubscribePluginFluxEvents(p: Plugin, fluxDispatcher: typeof FluxDispatcher) {
if (p.flux) {
logger.debug("Unsubscribing from flux events of plugin", p.name);
for (const [event, handler] of Object.entries(p.flux)) {
fluxDispatcher.unsubscribe(event as FluxEvents, handler);
}
}
}
export function subscribeAllPluginsFluxEvents(fluxDispatcher: typeof FluxDispatcher) {
enabledPluginsSubscribedFlux = true;
for (const name in Plugins) {
if (!isPluginEnabled(name)) continue;
subscribePluginFluxEvents(Plugins[name], fluxDispatcher);
}
}
export const startPlugin = traceFunction("startPlugin", function startPlugin(p: Plugin) {
const { name, commands, flux, contextMenus } = p;
@ -138,7 +168,7 @@ export const startPlugin = traceFunction("startPlugin", function startPlugin(p:
}
if (commands?.length) {
logger.info("Registering commands of plugin", name);
logger.debug("Registering commands of plugin", name);
for (const cmd of commands) {
try {
registerCommand(cmd, name);
@ -149,13 +179,13 @@ export const startPlugin = traceFunction("startPlugin", function startPlugin(p:
}
}
if (flux) {
for (const event in flux) {
FluxDispatcher.subscribe(event as FluxEvents, flux[event]);
}
if (enabledPluginsSubscribedFlux) {
subscribePluginFluxEvents(p, FluxDispatcher);
}
if (contextMenus) {
logger.debug("Adding context menus patches of plugin", name);
for (const navId in contextMenus) {
addContextMenuPatch(navId, contextMenus[navId]);
}
@ -182,7 +212,7 @@ export const stopPlugin = traceFunction("stopPlugin", function stopPlugin(p: Plu
}
if (commands?.length) {
logger.info("Unregistering commands of plugin", name);
logger.debug("Unregistering commands of plugin", name);
for (const cmd of commands) {
try {
unregisterCommand(cmd.name);
@ -193,13 +223,10 @@ export const stopPlugin = traceFunction("stopPlugin", function stopPlugin(p: Plu
}
}
if (flux) {
for (const event in flux) {
FluxDispatcher.unsubscribe(event as FluxEvents, flux[event]);
}
}
unsubscribePluginFluxEvents(p, FluxDispatcher);
if (contextMenus) {
logger.debug("Removing context menus patches of plugin", name);
for (const navId in contextMenus) {
removeContextMenuPatch(navId, contextMenus[navId]);
}

6
src/plugins/showHiddenChannels/index.tsx
View file

@ -36,6 +36,8 @@ const enum ShowMode {
HiddenIconWithMutedStyle
}
const CONNECT = 1n << 20n;
export const settings = definePluginSettings({
hideUnreads: {
description: "Hide Unreads",
@ -273,12 +275,12 @@ export default definePlugin({
{
// Change the role permission check to CONNECT if the channel is locked
match: /ADMINISTRATOR\)\|\|(?<=context:(\i)}.+?)(?=(.+?)VIEW_CHANNEL)/,
replace: (m, channel, permCheck) => `${m}!Vencord.Webpack.Common.PermissionStore.can(${PermissionsBits.CONNECT}n,${channel})?${permCheck}CONNECT):`
replace: (m, channel, permCheck) => `${m}!Vencord.Webpack.Common.PermissionStore.can(${CONNECT}n,${channel})?${permCheck}CONNECT):`
},
{
// Change the permissionOverwrite check to CONNECT if the channel is locked
match: /permissionOverwrites\[.+?\i=(?<=context:(\i)}.+?)(?=(.+?)VIEW_CHANNEL)/,
replace: (m, channel, permCheck) => `${m}!Vencord.Webpack.Common.PermissionStore.can(${PermissionsBits.CONNECT}n,${channel})?${permCheck}CONNECT):`
replace: (m, channel, permCheck) => `${m}!Vencord.Webpack.Common.PermissionStore.can(${CONNECT}n,${channel})?${permCheck}CONNECT):`
},
{
// Include the @everyone role in the allowed roles list for Hidden Channels

10
src/utils/patches.ts
View file

@ -18,20 +18,20 @@
import { PatchReplacement, ReplaceFn } from "./types";
export function canonicalizeMatch(match: RegExp | string) {
export function canonicalizeMatch<T extends RegExp | string>(match: T): T {
if (typeof match === "string") return match;
const canonSource = match.source
.replaceAll("\\i", "[A-Za-z_$][\\w$]*");
return new RegExp(canonSource, match.flags);
return new RegExp(canonSource, match.flags) as T;
}
export function canonicalizeReplace(replace: string | ReplaceFn, pluginName: string): string | ReplaceFn {
export function canonicalizeReplace<T extends string | ReplaceFn>(replace: T, pluginName: string): T {
const self = `Vencord.Plugins.plugins[${JSON.stringify(pluginName)}]`;
if (typeof replace !== "function")
return replace.replaceAll("$self", self);
return replace.replaceAll("$self", self) as T;
return (...args) => replace(...args).replaceAll("$self", self);
return ((...args) => replace(...args).replaceAll("$self", self)) as T;
}
export function canonicalizeDescriptor<T>(descriptor: TypedPropertyDescriptor<T>, canonicalize: (value: T) => T) {

2
src/webpack/common/components.ts
View file

@ -36,7 +36,7 @@ export let Tooltip: t.Tooltip;
export let TextInput: t.TextInput;
export let TextArea: t.TextArea;
export let Text: t.Text;
export let Heading: t.HeadingTag;
export let Heading: t.Heading;
export let Select: t.Select;
export let SearchableSelect: t.SearchableSelect;
export let Slider: t.Slider;

3
src/webpack/common/utils.ts
View file

@ -26,6 +26,9 @@ export let FluxDispatcher: t.FluxDispatcher;
waitFor(["dispatch", "subscribe"], m => {
FluxDispatcher = m;
// Non import call to avoid circular dependency
Vencord.Plugins.subscribeAllPluginsFluxEvents(m);
const cb = () => {
m.unsubscribe("CONNECTION_OPEN", cb);
_resolveReady();

363
src/webpack/patchWebpack.ts
View file

@ -18,66 +18,120 @@
import { WEBPACK_CHUNK } from "@utils/constants";
import { Logger } from "@utils/Logger";
import { canonicalizeReplacement } from "@utils/patches";
import { canonicalizeMatch, canonicalizeReplacement } from "@utils/patches";
import { PatchReplacement } from "@utils/types";
import { WebpackInstance } from "discord-types/other";
import { traceFunction } from "../debug/Tracer";
import { _initWebpack } from ".";
import { patches } from "../plugins";
import { _initWebpack, beforeInitListeners, factoryListeners, moduleListeners, subscriptions, wreq } from ".";
const logger = new Logger("WebpackInterceptor", "#8caaee");
const initCallbackRegex = canonicalizeMatch(/{return \i\(".+?"\)}/);
let webpackChunk: any[];
const logger = new Logger("WebpackInterceptor", "#8caaee");
// Patch the window webpack chunk setter to monkey patch the push method before any chunks are pushed
// This way we can patch the factory of everything being pushed to the modules array
Object.defineProperty(window, WEBPACK_CHUNK, {
configurable: true,
if (window[WEBPACK_CHUNK]) {
logger.info(`Patching ${WEBPACK_CHUNK}.push (was already existent, likely from cache!)`);
_initWebpack(window[WEBPACK_CHUNK]);
patchPush(window[WEBPACK_CHUNK]);
} else {
Object.defineProperty(window, WEBPACK_CHUNK, {
get: () => webpackChunk,
set: v => {
if (v?.push) {
if (!v.push.$$vencordOriginal) {
logger.info(`Patching ${WEBPACK_CHUNK}.push`);
patchPush(v);
get: () => webpackChunk,
set: v => {
if (v?.push) {
if (!v.push.$$vencordOriginal) {
logger.info(`Patching ${WEBPACK_CHUNK}.push`);
patchPush(v);
// @ts-ignore
delete window[WEBPACK_CHUNK];
window[WEBPACK_CHUNK] = v;
}
}
webpackChunk = v;
}
});
// wreq.O is the webpack onChunksLoaded function
// Discord uses it to await for all the chunks to be loaded before initializing the app
// We monkey patch it to also monkey patch the initialize app callback to get immediate access to the webpack require and run our listeners before doing it
Object.defineProperty(Function.prototype, "O", {
configurable: true,
set(onChunksLoaded: any) {
// When using react devtools or other extensions, or even when discord loads the sentry, we may also catch their webpack here.
// This ensures we actually got the right one
// this.e (wreq.e) is the method for loading a chunk, and only the main webpack has it
if (new Error().stack?.includes("discord.com") && String(this.e).includes("Promise.all")) {
logger.info("Found main WebpackRequire.onChunksLoaded");
delete (Function.prototype as any).O;
const originalOnChunksLoaded = onChunksLoaded;
onChunksLoaded = function (this: unknown, result: any, chunkIds: string[], callback: () => any, priority: number) {
if (callback != null && initCallbackRegex.test(callback.toString())) {
Object.defineProperty(this, "O", {
value: originalOnChunksLoaded,
configurable: true
});
const wreq = this as WebpackInstance;
const originalCallback = callback;
callback = function (this: unknown) {
logger.info("Patched initialize app callback invoked, initializing our internal references to WebpackRequire and running beforeInitListeners");
_initWebpack(wreq);
for (const beforeInitListener of beforeInitListeners) {
beforeInitListener(wreq);
}
originalCallback.apply(this, arguments as any);
};
callback.toString = originalCallback.toString.bind(originalCallback);
arguments[2] = callback;
}
if (_initWebpack(v)) {
logger.info("Successfully initialised Vencord webpack");
// @ts-ignore
delete window[WEBPACK_CHUNK];
window[WEBPACK_CHUNK] = v;
}
}
webpackChunk = v;
},
configurable: true
});
originalOnChunksLoaded.apply(this, arguments as any);
};
// wreq.m is the webpack module factory.
// normally, this is populated via webpackGlobal.push, which we patch below.
// However, Discord has their .m prepopulated.
// Thus, we use this hack to immediately access their wreq.m and patch all already existing factories
//
// Update: Discord now has TWO webpack instances. Their normal one and sentry
// Sentry does not push chunks to the global at all, so this same patch now also handles their sentry modules
Object.defineProperty(Function.prototype, "m", {
set(v: any) {
// When using react devtools or other extensions, we may also catch their webpack here.
// This ensures we actually got the right one
if (new Error().stack?.includes("discord.com")) {
logger.info("Found webpack module factory");
patchFactories(v);
}
onChunksLoaded.toString = originalOnChunksLoaded.toString.bind(originalOnChunksLoaded);
}
Object.defineProperty(this, "m", {
value: v,
configurable: true,
});
},
configurable: true
});
}
Object.defineProperty(this, "O", {
value: onChunksLoaded,
configurable: true
});
}
});
// wreq.m is the webpack module factory.
// normally, this is populated via webpackGlobal.push, which we patch below.
// However, Discord has their .m prepopulated.
// Thus, we use this hack to immediately access their wreq.m and patch all already existing factories
//
// Update: Discord now has TWO webpack instances. Their normal one and sentry
// Sentry does not push chunks to the global at all, so this same patch now also handles their sentry modules
Object.defineProperty(Function.prototype, "m", {
configurable: true,
set(v: any) {
// When using react devtools or other extensions, we may also catch their webpack here.
// This ensures we actually got the right one
const error = new Error();
if (error.stack?.includes("discord.com")) {
logger.info("Found Webpack module factory", error.stack.match(/\/assets\/(.+?\.js)/)?.[1] ?? "");
patchFactories(v);
}
Object.defineProperty(this, "m", {
value: v,
configurable: true
});
}
});
function patchPush(webpackGlobal: any) {
function handlePush(chunk: any) {
@ -91,6 +145,7 @@ function patchPush(webpackGlobal: any) {
}
handlePush.$$vencordOriginal = webpackGlobal.push;
handlePush.toString = handlePush.$$vencordOriginal.toString.bind(handlePush.$$vencordOriginal);
// Webpack overwrites .push with its own push like so: `d.push = n.bind(null, d.push.bind(d));`
// it wraps the old push (`d.push.bind(d)`). this old push is in this case our handlePush.
// If we then repatched the new push, we would end up with recursive patching, which leads to our patches
@ -99,41 +154,41 @@ function patchPush(webpackGlobal: any) {
handlePush.bind = (...args: unknown[]) => handlePush.$$vencordOriginal.bind(...args);
Object.defineProperty(webpackGlobal, "push", {
configurable: true,
get: () => handlePush,
set(v) {
handlePush.$$vencordOriginal = v;
},
configurable: true
}
});
}
function patchFactories(factories: Record<string | number, (module: { exports: any; }, exports: any, require: any) => void>) {
const { subscriptions, listeners } = Vencord.Webpack;
const { patches } = Vencord.Plugins;
let webpackNotInitializedLogged = false;
function patchFactories(factories: Record<string, (module: any, exports: any, require: WebpackInstance) => void>) {
for (const id in factories) {
let mod = factories[id];
// Discords Webpack chunks for some ungodly reason contain random
// newlines. Cyn recommended this workaround and it seems to work fine,
// however this could potentially break code, so if anything goes weird,
// this is probably why.
// Additionally, `[actual newline]` is one less char than "\n", so if Discord
// ever targets newer browsers, the minifier could potentially use this trick and
// cause issues.
//
// 0, prefix is to turn it into an expression: 0,function(){} would be invalid syntax without the 0,
let code: string = "0," + mod.toString().replaceAll("\n", "");
const originalMod = mod;
const patchedBy = new Set();
const factory = factories[id] = function (module, exports, require) {
const factory = factories[id] = function (module: any, exports: any, require: WebpackInstance) {
if (wreq == null && IS_DEV) {
if (!webpackNotInitializedLogged) {
webpackNotInitializedLogged = true;
logger.error("WebpackRequire was not initialized, running modules without patches instead.");
}
return void originalMod(module, exports, require);
}
try {
mod(module, exports, require);
} catch (err) {
// Just rethrow discord errors
if (mod === originalMod) throw err;
logger.error("Error in patched chunk", err);
logger.error("Error in patched module", err);
return void originalMod(module, exports, require);
}
@ -153,11 +208,11 @@ function patchFactories(factories: Record<string | number, (module: { exports: a
return;
}
for (const callback of listeners) {
for (const callback of moduleListeners) {
try {
callback(exports, id);
} catch (err) {
logger.error("Error in webpack listener", err);
logger.error("Error in Webpack module listener:\n", err, callback);
}
}
@ -171,107 +226,127 @@ function patchFactories(factories: Record<string | number, (module: { exports: a
callback(exports.default, id);
}
} catch (err) {
logger.error("Error while firing callback for webpack chunk", err);
logger.error("Error while firing callback for Webpack subscription:\n", err, filter, callback);
}
}
} as any as { toString: () => string, original: any, (...args: any[]): void; };
// for some reason throws some error on which calling .toString() leads to infinite recursion
// when you force load all chunks???
factory.toString = () => mod.toString();
factory.toString = originalMod.toString.bind(originalMod);
factory.original = originalMod;
for (const factoryListener of factoryListeners) {
try {
factoryListener(originalMod);
} catch (err) {
logger.error("Error in Webpack factory listener:\n", err, factoryListener);
}
}
// Discords Webpack chunks for some ungodly reason contain random
// newlines. Cyn recommended this workaround and it seems to work fine,
// however this could potentially break code, so if anything goes weird,
// this is probably why.
// Additionally, `[actual newline]` is one less char than "\n", so if Discord
// ever targets newer browsers, the minifier could potentially use this trick and
// cause issues.
//
// 0, prefix is to turn it into an expression: 0,function(){} would be invalid syntax without the 0,
let code: string = "0," + mod.toString().replaceAll("\n", "");
for (let i = 0; i < patches.length; i++) {
const patch = patches[i];
const executePatch = traceFunction(`patch by ${patch.plugin}`, (match: string | RegExp, replace: string) => code.replace(match, replace));
if (patch.predicate && !patch.predicate()) continue;
if (!code.includes(patch.find)) continue;
if (code.includes(patch.find)) {
patchedBy.add(patch.plugin);
patchedBy.add(patch.plugin);
const previousMod = mod;
const previousCode = code;
const executePatch = traceFunction(`patch by ${patch.plugin}`, (match: string | RegExp, replace: string) => code.replace(match, replace));
const previousMod = mod;
const previousCode = code;
// we change all patch.replacement to array in plugins/index
for (const replacement of patch.replacement as PatchReplacement[]) {
if (replacement.predicate && !replacement.predicate()) continue;
const lastMod = mod;
const lastCode = code;
// We change all patch.replacement to array in plugins/index
for (const replacement of patch.replacement as PatchReplacement[]) {
if (replacement.predicate && !replacement.predicate()) continue;
canonicalizeReplacement(replacement, patch.plugin);
const lastMod = mod;
const lastCode = code;
try {
const newCode = executePatch(replacement.match, replacement.replace as string);
if (newCode === code) {
if (!patch.noWarn) {
logger.warn(`Patch by ${patch.plugin} had no effect (Module id is ${id}): ${replacement.match}`);
if (IS_DEV) {
logger.debug("Function Source:\n", code);
}
canonicalizeReplacement(replacement, patch.plugin);
try {
const newCode = executePatch(replacement.match, replacement.replace as string);
if (newCode === code) {
if (!patch.noWarn) {
logger.warn(`Patch by ${patch.plugin} had no effect (Module id is ${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;
mod = previousMod;
patchedBy.delete(patch.plugin);
break;
}
} else {
code = newCode;
mod = (0, eval)(`// Webpack Module ${id} - Patched by ${[...patchedBy].join(", ")}\n${newCode}\n//# sourceURL=WebpackModule${id}`);
}
} catch (err) {
logger.error(`Patch by ${patch.plugin} errored (Module id is ${id}): ${replacement.match}\n`, err);
if (IS_DEV) {
const changeSize = code.length - lastCode.length;
const match = lastCode.match(replacement.match)!;
// 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 = [] as 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);
}
patchedBy.delete(patch.plugin);
if (patch.group) {
logger.warn(`Undoing patch group ${patch.find} by ${patch.plugin} because replacement ${replacement.match} errored`);
code = previousCode;
logger.warn(`Undoing patch group ${patch.find} by ${patch.plugin} because replacement ${replacement.match} had no effect`);
mod = previousMod;
code = previousCode;
patchedBy.delete(patch.plugin);
break;
}
code = lastCode;
mod = lastMod;
continue;
}
}
if (!patch.all) patches.splice(i--, 1);
code = newCode;
mod = (0, eval)(`// Webpack Module ${id} - Patched by ${[...patchedBy].join(", ")}\n${newCode}\n//# sourceURL=WebpackModule${id}`);
} catch (err) {
logger.error(`Patch by ${patch.plugin} errored (Module id is ${id}): ${replacement.match}\n`, err);
if (IS_DEV) {
const changeSize = code.length - lastCode.length;
const match = lastCode.match(replacement.match)!;
// 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 = [] as 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);
}
patchedBy.delete(patch.plugin);
if (patch.group) {
logger.warn(`Undoing patch group ${patch.find} by ${patch.plugin} because replacement ${replacement.match} errored`);
mod = previousMod;
code = previousCode;
break;
}
mod = lastMod;
code = lastCode;
}
}
if (!patch.all) patches.splice(i--, 1);
}
}
}

28
src/webpack/webpack.ts
View file

@ -68,20 +68,16 @@ export const filters = {
}
};
export const subscriptions = new Map<FilterFn, CallbackFn>();
export const listeners = new Set<CallbackFn>();
export type CallbackFn = (mod: any, id: string) => void;
export function _initWebpack(instance: typeof window.webpackChunkdiscord_app) {
if (cache !== void 0) throw "no.";
export const subscriptions = new Map<FilterFn, CallbackFn>();
export const moduleListeners = new Set<CallbackFn>();
export const factoryListeners = new Set<(factory: (module: any, exports: any, require: WebpackInstance) => void) => void>();
export const beforeInitListeners = new Set<(wreq: WebpackInstance) => void>();
instance.push([[Symbol("Vencord")], {}, r => wreq = r]);
instance.pop();
if (!wreq) return false;
cache = wreq.c;
return true;
export function _initWebpack(webpackRequire: WebpackInstance) {
wreq = webpackRequire;
cache = webpackRequire.c;
}
let devToolsOpen = false;
@ -425,7 +421,7 @@ export async function extractAndLoadChunks(code: string[], matcher: RegExp = Def
const match = module.toString().match(canonicalizeMatch(matcher));
if (!match) {
const err = new Error("extractAndLoadChunks: Couldn't find entry point id in module factory code");
const err = new Error("extractAndLoadChunks: Couldn't find chunk loading in module factory code");
logger.warn(err, "Code:", code, "Matcher:", matcher);
// Strict behaviour in DevBuilds to fail early and make sure the issue is found
@ -491,14 +487,6 @@ export function waitFor(filter: string | string[] | FilterFn, callback: Callback
subscriptions.set(filter, callback);
}
export function addListener(callback: CallbackFn) {
listeners.add(callback);
}
export function removeListener(callback: CallbackFn) {
listeners.delete(callback);
}
/**
* Search modules by keyword. This searches the factory methods,
* meaning you can search all sorts of things, displayName, methodName, strings somewhere in the code, etc