Reduce size of parser-typescript.js (#13431)
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fisker Cheung authored and GitHub committed
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commit
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@@ -2,6 +2,7 @@ import path from "node:path";
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import { createRequire } from "node:module";
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import createEsmUtils from "esm-utils";
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import { PROJECT_ROOT } from "../utils/index.mjs";
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import modifyTypescriptModule from "./modify-typescript-module.mjs";
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const { require } = createEsmUtils(import.meta);
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@@ -101,62 +102,8 @@ const parsers = [
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},
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{
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module: require.resolve("typescript"),
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process(text) {
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return text.replace(
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/(?<=\n)(?<indentString>\s+)function tryGetNodePerformanceHooks\(\) {.*?\n\k<indentString>}(?=\n)/s,
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"function tryGetNodePerformanceHooks() {}"
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);
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},
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process: modifyTypescriptModule,
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},
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...Object.entries({
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// `typescript/lib/typescript.js` expose extra global objects
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// `TypeScript`, `toolsVersion`, `globalThis`
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'typeof process === "undefined" || process.browser': "false",
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'typeof globalThis === "object"': "true",
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"_fs.realpathSync.native":
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"_fs.realpathSync && _fs.realpathSync.native",
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// Remove useless `ts.sys`
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"ts.sys = ": "ts.sys = undefined && ",
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// Remove useless language service
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"ts.realizeDiagnostics = ": "ts.realizeDiagnostics = undefined && ",
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"ts.TypeScriptServicesFactory = ":
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"ts.TypeScriptServicesFactory = undefined && ",
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"var ShimBase = ": "var ShimBase = undefined && ",
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"var TypeScriptServicesFactory = ":
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"var TypeScriptServicesFactory = undefined && ",
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"var LanguageServiceShimObject = ":
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"var LanguageServiceShimObject = undefined && ",
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"var CoreServicesShimHostAdapter = ":
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"var CoreServicesShimHostAdapter = undefined && ",
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"var LanguageServiceShimHostAdapter = ":
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"var LanguageServiceShimHostAdapter = undefined && ",
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"var ScriptSnapshotShimAdapter = ":
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"var ScriptSnapshotShimAdapter = undefined && ",
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"var ClassifierShimObject = ":
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"var ClassifierShimObject = undefined && ",
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"var CoreServicesShimObject = ":
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"var CoreServicesShimObject = undefined && ",
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"function simpleForwardCall(": "0 && function simpleForwardCall(",
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"function forwardJSONCall(": "0 && function forwardJSONCall(",
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"function forwardCall(": "0 && function forwardCall(",
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"function realizeDiagnostics(": "0 && function realizeDiagnostics(",
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"function realizeDiagnostic(": "0 && function realizeDiagnostic(",
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"function convertClassifications(":
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"0 && function convertClassifications(",
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// Dynamic `require()`s
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"ts.sys && ts.sys.require": "false",
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"require(etwModulePath)": "undefined",
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'require("source-map-support").install()': "",
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"require(modulePath)": "undefined",
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}).map(([find, replacement]) => ({
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module: require.resolve("typescript"),
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find,
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replacement,
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})),
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{
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module: require.resolve("debug/src/browser.js"),
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path: require.resolve("./shims/debug.cjs"),
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@@ -0,0 +1,484 @@
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import path from "node:path";
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import escapeStringRegexp from "escape-string-regexp";
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import { outdent } from "outdent";
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import { writeFile, PROJECT_ROOT } from "../utils/index.mjs";
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/*
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Root submodule in `typescript.js` are bundled like
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```js
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var ts;
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(function (ts) {
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// Submodule
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})(ts || (ts = {}));
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```
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*/
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const SUBMODULE_START = escapeStringRegexp("var ts;\n(function (ts) {");
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const SUBMODULE_END = escapeStringRegexp("})(ts || (ts = {}));");
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function getSubmodules(text, testFunction) {
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const regexp = new RegExp(
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[
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"(?<=\n)",
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`(?<before>${SUBMODULE_START})`,
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"(?=\n)",
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"(?<text>.*?)",
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"(?<=\n)",
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`(?<after>${SUBMODULE_END})`,
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"(?=\n)",
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].join(""),
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"gsu"
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);
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return [...text.matchAll(regexp)]
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.filter((match) => testFunction(match.groups.text))
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.map((match) => ({
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start: match.index,
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end: match.index + match[0].length,
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...match.groups,
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}));
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}
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function removeSubmodule(text, testFunction) {
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return replaceSubmodule(text, testFunction, "");
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}
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function replaceSubmodule(text, testFunction, replacement) {
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const modules = getSubmodules(text, testFunction);
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if (modules.length !== 1) {
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return text;
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// TODO: Enable this check when merge to `next` branch
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// throw Object.assign(
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// new Error(
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// `Expect exactly one submodule to be found, got ${modules.length} submodules.`
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// ),
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// { modules }
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// );
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}
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const [{ start, end, before, after }] = modules;
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if (replacement) {
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replacement = before + "\n" + replacement + "\n" + after;
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}
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return text.slice(0, start) + replacement + text.slice(end);
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}
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function removeMultipleSubmodules(text, testFunction) {
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let modules = getSubmodules(text, testFunction);
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if (modules.length < 2) {
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throw new Error("Expect more than one submodules to be found");
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}
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for (; modules.length > 0; modules = getSubmodules(text, testFunction)) {
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const [{ start, end }] = modules;
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text = text.slice(0, start) + text.slice(end);
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}
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return text;
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}
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function replaceAlignedCode(text, { start, end, replacement = "" }) {
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const regexp = new RegExp(
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[
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"(?<=\n)",
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"(?<indentString>\\s*)",
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escapeStringRegexp(start),
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".*?",
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"(?<=\n)",
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"\\k<indentString>",
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escapeStringRegexp(end),
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"(?=\n)",
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].join(""),
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"gsu"
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);
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return text.replaceAll(regexp, replacement);
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}
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function modifyTypescriptModule(text) {
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// Code after `globalThis` shim are useless
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const positionOfGlobalThisShim = text.indexOf(
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"// We polyfill `globalThis` here so re can reliably patch the global scope"
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);
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if (positionOfGlobalThisShim === -1) {
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throw new Error("Unexpected source.");
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}
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text = text.slice(0, positionOfGlobalThisShim) + "module.exports = ts;";
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// File system
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text = removeSubmodule(text, (text) =>
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text.includes("ts.generateDjb2Hash = generateDjb2Hash;")
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);
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// Language service
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text = removeSubmodule(text, (text) =>
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text.includes("ts.TypeScriptServicesFactory = TypeScriptServicesFactory;")
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);
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// `ts.Version`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.Version = Version;")
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);
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// `ts.transform`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transform = transform;")
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);
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// `ts.BreakpointResolver`
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text = removeSubmodule(text, (text) =>
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text.trimStart().startsWith("var BreakpointResolver;")
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);
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// `ts.textChanges`
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text = removeSubmodule(text, (text) =>
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text.trimStart().startsWith("var textChanges;")
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);
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// `ts.preProcessFile`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.preProcessFile = preProcessFile;")
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);
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// `ts.Rename`
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text = removeSubmodule(text, (text) =>
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text.trimStart().startsWith("var Rename;")
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);
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// `ts.SmartSelectionRange`
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text = removeSubmodule(text, (text) =>
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text.trimStart().startsWith("var SmartSelectionRange;")
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);
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// `ts.SignatureHelp`
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text = removeSubmodule(text, (text) =>
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text.trimStart().startsWith("var SignatureHelp;")
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);
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// `ts.InlayHints`
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text = removeSubmodule(text, (text) =>
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text.trimStart().startsWith("var InlayHints;")
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);
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// Sourcemap
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text = removeSubmodule(text, (text) =>
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text.includes("ts.getSourceMapper = getSourceMapper;")
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);
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text = removeSubmodule(text, (text) =>
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text.includes("ts.createSourceMapGenerator = createSourceMapGenerator;")
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);
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// Suggestion
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text = removeSubmodule(text, (text) =>
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text.includes(
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"ts.computeSuggestionDiagnostics = computeSuggestionDiagnostics;"
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)
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);
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// Tracing
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text = removeSubmodule(text, (text) =>
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text.includes("ts.startTracing = tracingEnabled.startTracing;")
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);
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// Diagnostics
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text = removeSubmodule(text, (text) =>
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text.includes("ts.createProgramHost = createProgramHost;")
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);
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// `ts.transformTypeScript`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformTypeScript = transformTypeScript;")
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);
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// `ts.createRuntimeTypeSerializer`
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text = removeSubmodule(text, (text) =>
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text.includes(
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"ts.createRuntimeTypeSerializer = createRuntimeTypeSerializer;"
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)
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);
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// Transform
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// `ts.transformLegacyDecorators`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformLegacyDecorators = transformLegacyDecorators;")
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);
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// `ts.transformES5`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformES5 = transformES5;")
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);
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// `ts.transformES2015`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformES2015 = transformES2015;")
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);
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// `ts.transformES2016`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformES2016 = transformES2016;")
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);
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// `ts.transformES2017` & `ts.createSuperAccessVariableStatement`
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text = removeSubmodule(
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text,
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(text) =>
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text.includes("ts.transformES2017 = transformES2017;") &&
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text.includes(
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"ts.createSuperAccessVariableStatement = createSuperAccessVariableStatement;"
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)
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);
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// `ts.transformES2018`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformES2018 = transformES2018;")
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);
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// `ts.transformES2019`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformES2019 = transformES2019;")
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);
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// `ts.transformES2020`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformES2020 = transformES2020;")
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);
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// `ts.transformES2021`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformES2021 = transformES2021;")
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);
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// `ts.transformESNext`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformESNext = transformESNext;")
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);
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// `ts.transformJsx`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformJsx = transformJsx;")
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);
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// `ts.transformGenerators`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformGenerators = transformGenerators;")
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);
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// `ts.transformModule`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformModule = transformModule;")
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);
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// `ts.transformSystemModule`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformSystemModule = transformSystemModule;")
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);
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// `ts.transformECMAScriptModule`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformECMAScriptModule = transformECMAScriptModule;")
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);
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// `ts.transformNodeModule`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformNodeModule = transformNodeModule;")
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);
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// `ts.transformClassFields`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformClassFields = transformClassFields;")
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);
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// `ts.transformDeclarations`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformDeclarations = transformDeclarations;")
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);
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// `ts.transformNodes` and more
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transformNodes = transformNodes;")
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);
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// `ts.server`
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text = removeSubmodule(text, (text) => text.includes("(ts.server = {})"));
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// `ts.JsTyping`
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text = removeSubmodule(text, (text) => text.includes("(ts.JsTyping = {})"));
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// `ts.ClassificationType`
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text = removeSubmodule(text, (text) =>
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text.includes("(ts.ClassificationType = {})")
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);
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// Build
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text = removeSubmodule(text, (text) =>
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text.includes("ts.createSolutionBuilder = createSolutionBuilder;")
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);
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text = removeSubmodule(text, (text) =>
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text.includes("ts.parseBuildCommand = parseBuildCommand;")
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);
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text = removeSubmodule(text, (text) =>
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text.includes("ts.createBuilderProgram = createBuilderProgram;")
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);
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text = removeSubmodule(text, (text) =>
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text.includes(
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"ts.createSemanticDiagnosticsBuilderProgram = createSemanticDiagnosticsBuilderProgram;"
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)
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);
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text = removeSubmodule(text, (text) =>
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text.includes("ts.createResolutionCache = createResolutionCache;")
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);
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text = removeSubmodule(text, (text) =>
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text.includes("ts.createWatchCompilerHost = createWatchCompilerHost;")
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);
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text = removeSubmodule(text, (text) =>
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text.includes(
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"ts.resolveConfigFileProjectName = resolveConfigFileProjectName;"
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)
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);
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text = removeSubmodule(text, (text) =>
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text.includes("ts.getBuildInfo = getBuildInfo;")
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);
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// Compile
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text = removeSubmodule(text, (text) =>
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text.includes("ts.createCompilerHost = createCompilerHost;")
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);
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text = removeSubmodule(text, (text) =>
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text.includes("(ts.BuilderState = {})")
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);
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text = removeSubmodule(text, (text) =>
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text.includes("ts.transpile = transpile;")
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);
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// Watch
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text = removeSubmodule(text, (text) =>
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text.includes("ts.getWatchFactory = getWatchFactory;")
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);
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// `ts.canProduceDiagnostics`, `ts.createGetSymbolAccessibilityDiagnosticForNode`, and `ts.createGetSymbolAccessibilityDiagnosticForNode`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.canProduceDiagnostics = canProduceDiagnostics;")
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);
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// `ts.moduleSpecifiers`
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text = removeSubmodule(text, (text) =>
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text.includes("(ts.moduleSpecifiers = {})")
|
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);
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// `ts.trace`
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text = removeSubmodule(text, (text) => text.includes("ts.trace = trace;"));
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// `ts.createTypeChecker`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.createTypeChecker = createTypeChecker;")
|
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);
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// `ts.DocumentHighlights`
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text = removeSubmodule(text, (text) =>
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text.includes("(ts.DocumentHighlights = {})")
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);
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// `ts.createDocumentRegistry`
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text = removeSubmodule(text, (text) =>
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text.includes("ts.createDocumentRegistry = createDocumentRegistry;")
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);
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// `ts.CallHierarchy`
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text = removeSubmodule(text, (text) =>
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text.includes("(ts.CallHierarchy = {})")
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);
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// `ts.flattenDestructuringAssignment` and `ts.flattenDestructuringBinding`
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text = removeSubmodule(
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text,
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(text) =>
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text.includes(
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"ts.flattenDestructuringAssignment = flattenDestructuringAssignment"
|
||||
) &&
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text.includes(
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||||
"ts.flattenDestructuringBinding = flattenDestructuringBinding"
|
||||
)
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);
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// `ts.processTaggedTemplateExpression`
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text = removeSubmodule(text, (text) =>
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text.includes(
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"ts.processTaggedTemplateExpression = processTaggedTemplateExpression"
|
||||
)
|
||||
);
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// Editor
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||||
text = removeSubmodule(text, (text) =>
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||||
text.includes("ts.getEditsForFileRename = getEditsForFileRename;")
|
||||
);
|
||||
text = removeSubmodule(text, (text) =>
|
||||
text.includes("(ts.GoToDefinition = {})")
|
||||
);
|
||||
text = removeSubmodule(text, (text) => text.includes("(ts.JsDoc = {})"));
|
||||
text = removeSubmodule(text, (text) => text.includes("(ts.NavigateTo = {})"));
|
||||
text = removeSubmodule(text, (text) =>
|
||||
text.includes("(ts.NavigationBar = {})")
|
||||
);
|
||||
text = removeSubmodule(text, (text) =>
|
||||
text.includes("(ts.OrganizeImports = {})")
|
||||
);
|
||||
text = removeSubmodule(text, (text) =>
|
||||
text.includes("(ts.OutliningElementsCollector = {})")
|
||||
);
|
||||
text = removeSubmodule(text, (text) =>
|
||||
text.includes("ts.createPatternMatcher = createPatternMatcher;")
|
||||
);
|
||||
text = removeSubmodule(text, (text) =>
|
||||
text.includes("(ts.SymbolDisplay = {})")
|
||||
);
|
||||
|
||||
// `ts.refactor` (multiple)
|
||||
text = removeMultipleSubmodules(text, (text) =>
|
||||
text.trimStart().startsWith("var refactor;")
|
||||
);
|
||||
|
||||
// `ts.codefix` (multiple)
|
||||
text = removeMultipleSubmodules(text, (text) =>
|
||||
text.trimStart().startsWith("var codefix;")
|
||||
);
|
||||
|
||||
// `ts.formatting` (multiple)
|
||||
text = removeMultipleSubmodules(text, (text) =>
|
||||
text.trimStart().startsWith("var formatting;")
|
||||
);
|
||||
|
||||
// `ts.Completions` (multiple)
|
||||
text = removeMultipleSubmodules(text, (text) =>
|
||||
text.trimStart().startsWith("var Completions;")
|
||||
);
|
||||
|
||||
// `ts.FindAllReferences` (multiple)
|
||||
text = removeMultipleSubmodules(text, (text) =>
|
||||
text.trimStart().startsWith("var FindAllReferences;")
|
||||
);
|
||||
|
||||
// Performance
|
||||
text = replaceSubmodule(
|
||||
text,
|
||||
(text) =>
|
||||
text.includes(
|
||||
"ts.tryGetNativePerformanceHooks = tryGetNativePerformanceHooks;"
|
||||
),
|
||||
outdent`
|
||||
ts.tryGetNativePerformanceHooks = () => {};
|
||||
ts.timestamp = Date.now;
|
||||
`
|
||||
);
|
||||
|
||||
for (const [find, replacement] of Object.entries({
|
||||
// yarn pnp
|
||||
"process.versions.pnp": "undefined",
|
||||
|
||||
// Dynamic `require()`s
|
||||
"ts.sys && ts.sys.require": "false",
|
||||
"require(etwModulePath)": "undefined",
|
||||
})) {
|
||||
text = text.replaceAll(find, replacement);
|
||||
}
|
||||
|
||||
text = replaceAlignedCode(text, {
|
||||
start: "var debugObjectHost = (function () {",
|
||||
end: "})();",
|
||||
});
|
||||
|
||||
return text;
|
||||
}
|
||||
|
||||
// Save modified code to `{PROJECT_ROOT}/.tmp/modified-typescript.js` for debug
|
||||
const saveOutputToDisk = (process) => (text) => {
|
||||
const result = process(text);
|
||||
writeFile(path.join(PROJECT_ROOT, ".tmp/modified-typescript.js"), result);
|
||||
return result;
|
||||
};
|
||||
|
||||
export default saveOutputToDisk(modifyTypescriptModule);
|
||||
Reference in new issue
Block a user