660 lines
26 KiB
JavaScript
660 lines
26 KiB
JavaScript
"use strict";
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/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.Mangler = void 0;
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const v8 = require("node:v8");
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const fs = require("fs");
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const path = require("path");
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const process_1 = require("process");
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const source_map_1 = require("source-map");
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const ts = require("typescript");
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const url_1 = require("url");
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const workerpool = require("workerpool");
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const staticLanguageServiceHost_1 = require("./staticLanguageServiceHost");
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const buildfile = require('../../buildfile');
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class ShortIdent {
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prefix;
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static _keywords = new Set(['await', 'break', 'case', 'catch', 'class', 'const', 'continue', 'debugger',
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'default', 'delete', 'do', 'else', 'export', 'extends', 'false', 'finally', 'for', 'function', 'if',
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'import', 'in', 'instanceof', 'let', 'new', 'null', 'return', 'static', 'super', 'switch', 'this', 'throw',
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'true', 'try', 'typeof', 'var', 'void', 'while', 'with', 'yield']);
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static _alphabet = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890$_'.split('');
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_value = 0;
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constructor(prefix) {
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this.prefix = prefix;
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}
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next(isNameTaken) {
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const candidate = this.prefix + ShortIdent.convert(this._value);
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this._value++;
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if (ShortIdent._keywords.has(candidate) || /^[_0-9]/.test(candidate) || isNameTaken?.(candidate)) {
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// try again
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return this.next(isNameTaken);
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}
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return candidate;
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}
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static convert(n) {
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const base = this._alphabet.length;
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let result = '';
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do {
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const rest = n % base;
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result += this._alphabet[rest];
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n = (n / base) | 0;
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} while (n > 0);
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return result;
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}
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}
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var FieldType;
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(function (FieldType) {
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FieldType[FieldType["Public"] = 0] = "Public";
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FieldType[FieldType["Protected"] = 1] = "Protected";
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FieldType[FieldType["Private"] = 2] = "Private";
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})(FieldType || (FieldType = {}));
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class ClassData {
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fileName;
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node;
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fields = new Map();
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replacements;
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parent;
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children;
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constructor(fileName, node) {
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// analyse all fields (properties and methods). Find usages of all protected and
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// private ones and keep track of all public ones (to prevent naming collisions)
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this.fileName = fileName;
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this.node = node;
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const candidates = [];
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for (const member of node.members) {
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if (ts.isMethodDeclaration(member)) {
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// method `foo() {}`
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candidates.push(member);
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}
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else if (ts.isPropertyDeclaration(member)) {
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// property `foo = 234`
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candidates.push(member);
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}
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else if (ts.isGetAccessor(member)) {
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// getter: `get foo() { ... }`
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candidates.push(member);
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}
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else if (ts.isSetAccessor(member)) {
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// setter: `set foo() { ... }`
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candidates.push(member);
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}
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else if (ts.isConstructorDeclaration(member)) {
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// constructor-prop:`constructor(private foo) {}`
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for (const param of member.parameters) {
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if (hasModifier(param, ts.SyntaxKind.PrivateKeyword)
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|| hasModifier(param, ts.SyntaxKind.ProtectedKeyword)
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|| hasModifier(param, ts.SyntaxKind.PublicKeyword)
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|| hasModifier(param, ts.SyntaxKind.ReadonlyKeyword)) {
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candidates.push(param);
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}
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}
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}
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}
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for (const member of candidates) {
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const ident = ClassData._getMemberName(member);
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if (!ident) {
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continue;
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}
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const type = ClassData._getFieldType(member);
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this.fields.set(ident, { type, pos: member.name.getStart() });
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}
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}
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static _getMemberName(node) {
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if (!node.name) {
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return undefined;
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}
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const { name } = node;
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let ident = name.getText();
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if (name.kind === ts.SyntaxKind.ComputedPropertyName) {
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if (name.expression.kind !== ts.SyntaxKind.StringLiteral) {
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// unsupported: [Symbol.foo] or [abc + 'field']
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return;
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}
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// ['foo']
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ident = name.expression.getText().slice(1, -1);
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}
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return ident;
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}
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static _getFieldType(node) {
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if (hasModifier(node, ts.SyntaxKind.PrivateKeyword)) {
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return 2 /* FieldType.Private */;
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}
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else if (hasModifier(node, ts.SyntaxKind.ProtectedKeyword)) {
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return 1 /* FieldType.Protected */;
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}
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else {
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return 0 /* FieldType.Public */;
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}
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}
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static _shouldMangle(type) {
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return type === 2 /* FieldType.Private */
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|| type === 1 /* FieldType.Protected */;
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}
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static makeImplicitPublicActuallyPublic(data, reportViolation) {
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// TS-HACK
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// A subtype can make an inherited protected field public. To prevent accidential
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// mangling of public fields we mark the original (protected) fields as public...
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for (const [name, info] of data.fields) {
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if (info.type !== 0 /* FieldType.Public */) {
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continue;
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}
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let parent = data.parent;
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while (parent) {
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if (parent.fields.get(name)?.type === 1 /* FieldType.Protected */) {
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const parentPos = parent.node.getSourceFile().getLineAndCharacterOfPosition(parent.fields.get(name).pos);
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const infoPos = data.node.getSourceFile().getLineAndCharacterOfPosition(info.pos);
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reportViolation(name, `'${name}' from ${parent.fileName}:${parentPos.line + 1}`, `${data.fileName}:${infoPos.line + 1}`);
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parent.fields.get(name).type = 0 /* FieldType.Public */;
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}
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parent = parent.parent;
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}
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}
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}
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static fillInReplacement(data) {
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if (data.replacements) {
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// already done
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return;
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}
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// fill in parents first
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if (data.parent) {
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ClassData.fillInReplacement(data.parent);
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}
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data.replacements = new Map();
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const isNameTaken = (name) => {
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// locally taken
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if (data._isNameTaken(name)) {
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return true;
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}
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// parents
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let parent = data.parent;
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while (parent) {
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if (parent._isNameTaken(name)) {
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return true;
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}
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parent = parent.parent;
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}
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// children
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if (data.children) {
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const stack = [...data.children];
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while (stack.length) {
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const node = stack.pop();
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if (node._isNameTaken(name)) {
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return true;
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}
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if (node.children) {
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stack.push(...node.children);
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}
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}
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}
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return false;
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};
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const identPool = new ShortIdent('');
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for (const [name, info] of data.fields) {
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if (ClassData._shouldMangle(info.type)) {
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const shortName = identPool.next(isNameTaken);
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data.replacements.set(name, shortName);
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}
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}
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}
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// a name is taken when a field that doesn't get mangled exists or
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// when the name is already in use for replacement
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_isNameTaken(name) {
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if (this.fields.has(name) && !ClassData._shouldMangle(this.fields.get(name).type)) {
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// public field
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return true;
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}
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if (this.replacements) {
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for (const shortName of this.replacements.values()) {
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if (shortName === name) {
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// replaced already (happens wih super types)
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return true;
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}
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}
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}
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if (isNameTakenInFile(this.node, name)) {
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return true;
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}
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return false;
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}
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lookupShortName(name) {
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let value = this.replacements.get(name);
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let parent = this.parent;
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while (parent) {
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if (parent.replacements.has(name) && parent.fields.get(name)?.type === 1 /* FieldType.Protected */) {
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value = parent.replacements.get(name) ?? value;
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}
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parent = parent.parent;
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}
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return value;
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}
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// --- parent chaining
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addChild(child) {
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this.children ??= [];
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this.children.push(child);
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child.parent = this;
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}
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}
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function isNameTakenInFile(node, name) {
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const identifiers = node.getSourceFile().identifiers;
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if (identifiers instanceof Map) {
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if (identifiers.has(name)) {
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return true;
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}
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}
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return false;
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}
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const skippedExportMangledFiles = [
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// Build
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'css.build',
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// Monaco
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'editorCommon',
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'editorOptions',
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'editorZoom',
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'standaloneEditor',
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'standaloneEnums',
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'standaloneLanguages',
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// Generated
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'extensionsApiProposals',
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// Module passed around as type
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'pfs',
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// entry points
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...[
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buildfile.workerEditor,
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buildfile.workerExtensionHost,
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buildfile.workerNotebook,
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buildfile.workerLanguageDetection,
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buildfile.workerLocalFileSearch,
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buildfile.workerProfileAnalysis,
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buildfile.workerOutputLinks,
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buildfile.workerBackgroundTokenization,
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buildfile.workbenchDesktop,
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buildfile.workbenchWeb,
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buildfile.code,
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buildfile.codeWeb
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].flat().map(x => x.name),
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];
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const skippedExportMangledProjects = [
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// Test projects
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'vscode-api-tests',
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// These projects use webpack to dynamically rewrite imports, which messes up our mangling
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'configuration-editing',
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'microsoft-authentication',
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'github-authentication',
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'html-language-features/server',
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];
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const skippedExportMangledSymbols = [
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// Don't mangle extension entry points
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'activate',
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'deactivate',
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];
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class DeclarationData {
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fileName;
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node;
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replacementName;
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constructor(fileName, node, fileIdents) {
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this.fileName = fileName;
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this.node = node;
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// Todo: generate replacement names based on usage count, with more used names getting shorter identifiers
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this.replacementName = fileIdents.next();
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}
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getLocations(service) {
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if (ts.isVariableDeclaration(this.node)) {
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// If the const aliases any types, we need to rename those too
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const definitionResult = service.getDefinitionAndBoundSpan(this.fileName, this.node.name.getStart());
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if (definitionResult?.definitions && definitionResult.definitions.length > 1) {
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return definitionResult.definitions.map(x => ({ fileName: x.fileName, offset: x.textSpan.start }));
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}
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}
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return [{
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fileName: this.fileName,
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offset: this.node.name.getStart()
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}];
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}
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shouldMangle(newName) {
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const currentName = this.node.name.getText();
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if (currentName.startsWith('$') || skippedExportMangledSymbols.includes(currentName)) {
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return false;
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}
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// New name is longer the existing one :'(
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if (newName.length >= currentName.length) {
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return false;
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}
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// Don't mangle functions we've explicitly opted out
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if (this.node.getFullText().includes('@skipMangle')) {
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return false;
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}
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return true;
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}
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}
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/**
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* TypeScript2TypeScript transformer that mangles all private and protected fields
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*
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* 1. Collect all class fields (properties, methods)
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* 2. Collect all sub and super-type relations between classes
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* 3. Compute replacement names for each field
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* 4. Lookup rename locations for these fields
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* 5. Prepare and apply edits
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*/
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class Mangler {
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projectPath;
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log;
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config;
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allClassDataByKey = new Map();
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allExportedSymbols = new Set();
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renameWorkerPool;
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constructor(projectPath, log = () => { }, config) {
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this.projectPath = projectPath;
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this.log = log;
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this.config = config;
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this.renameWorkerPool = workerpool.pool(path.join(__dirname, 'renameWorker.js'), {
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maxWorkers: 1,
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minWorkers: 'max'
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});
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}
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async computeNewFileContents(strictImplicitPublicHandling) {
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const service = ts.createLanguageService(new staticLanguageServiceHost_1.StaticLanguageServiceHost(this.projectPath));
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// STEP:
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// - Find all classes and their field info.
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// - Find exported symbols.
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const fileIdents = new ShortIdent('$');
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const visit = (node) => {
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if (this.config.manglePrivateFields) {
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if (ts.isClassDeclaration(node) || ts.isClassExpression(node)) {
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const anchor = node.name ?? node;
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const key = `${node.getSourceFile().fileName}|${anchor.getStart()}`;
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if (this.allClassDataByKey.has(key)) {
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throw new Error('DUPE?');
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}
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this.allClassDataByKey.set(key, new ClassData(node.getSourceFile().fileName, node));
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}
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}
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if (this.config.mangleExports) {
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// Find exported classes, functions, and vars
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if ((
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// Exported class
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ts.isClassDeclaration(node)
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&& hasModifier(node, ts.SyntaxKind.ExportKeyword)
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&& node.name) || (
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// Exported function
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ts.isFunctionDeclaration(node)
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&& ts.isSourceFile(node.parent)
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&& hasModifier(node, ts.SyntaxKind.ExportKeyword)
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&& node.name && node.body // On named function and not on the overload
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) || (
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// Exported variable
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ts.isVariableDeclaration(node)
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&& hasModifier(node.parent.parent, ts.SyntaxKind.ExportKeyword) // Variable statement is exported
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&& ts.isSourceFile(node.parent.parent.parent))
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// Disabled for now because we need to figure out how to handle
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// enums that are used in monaco or extHost interfaces.
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/* || (
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// Exported enum
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ts.isEnumDeclaration(node)
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&& ts.isSourceFile(node.parent)
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&& hasModifier(node, ts.SyntaxKind.ExportKeyword)
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&& !hasModifier(node, ts.SyntaxKind.ConstKeyword) // Don't bother mangling const enums because these are inlined
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&& node.name
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*/
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) {
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if (isInAmbientContext(node)) {
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return;
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}
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this.allExportedSymbols.add(new DeclarationData(node.getSourceFile().fileName, node, fileIdents));
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}
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}
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ts.forEachChild(node, visit);
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};
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for (const file of service.getProgram().getSourceFiles()) {
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if (!file.isDeclarationFile) {
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ts.forEachChild(file, visit);
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}
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}
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this.log(`Done collecting. Classes: ${this.allClassDataByKey.size}. Exported symbols: ${this.allExportedSymbols.size}`);
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// STEP: connect sub and super-types
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const setupParents = (data) => {
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const extendsClause = data.node.heritageClauses?.find(h => h.token === ts.SyntaxKind.ExtendsKeyword);
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if (!extendsClause) {
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// no EXTENDS-clause
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return;
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}
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const info = service.getDefinitionAtPosition(data.fileName, extendsClause.types[0].expression.getEnd());
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if (!info || info.length === 0) {
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// throw new Error('SUPER type not found');
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return;
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}
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if (info.length !== 1) {
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// inherits from declared/library type
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return;
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}
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const [definition] = info;
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const key = `${definition.fileName}|${definition.textSpan.start}`;
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const parent = this.allClassDataByKey.get(key);
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if (!parent) {
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// throw new Error(`SUPER type not found: ${key}`);
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return;
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}
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parent.addChild(data);
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};
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for (const data of this.allClassDataByKey.values()) {
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setupParents(data);
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}
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// STEP: make implicit public (actually protected) field really public
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const violations = new Map();
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let violationsCauseFailure = false;
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for (const data of this.allClassDataByKey.values()) {
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ClassData.makeImplicitPublicActuallyPublic(data, (name, what, why) => {
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const arr = violations.get(what);
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if (arr) {
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arr.push(why);
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}
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else {
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violations.set(what, [why]);
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}
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if (strictImplicitPublicHandling && !strictImplicitPublicHandling.has(name)) {
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violationsCauseFailure = true;
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}
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});
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}
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for (const [why, whys] of violations) {
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this.log(`WARN: ${why} became PUBLIC because of: ${whys.join(' , ')}`);
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}
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if (violationsCauseFailure) {
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const message = 'Protected fields have been made PUBLIC. This hurts minification and is therefore not allowed. Review the WARN messages further above';
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this.log(`ERROR: ${message}`);
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throw new Error(message);
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}
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// STEP: compute replacement names for each class
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for (const data of this.allClassDataByKey.values()) {
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ClassData.fillInReplacement(data);
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}
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this.log(`Done creating class replacements`);
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// STEP: prepare rename edits
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this.log(`Starting prepare rename edits`);
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const editsByFile = new Map();
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const appendEdit = (fileName, edit) => {
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const edits = editsByFile.get(fileName);
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if (!edits) {
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editsByFile.set(fileName, [edit]);
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}
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else {
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edits.push(edit);
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}
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};
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const appendRename = (newText, loc) => {
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appendEdit(loc.fileName, {
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newText: (loc.prefixText || '') + newText + (loc.suffixText || ''),
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offset: loc.textSpan.start,
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length: loc.textSpan.length
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});
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};
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const renameResults = [];
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const queueRename = (fileName, pos, newName) => {
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renameResults.push(Promise.resolve(this.renameWorkerPool.exec('findRenameLocations', [this.projectPath, fileName, pos]))
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.then((locations) => ({ newName, locations })));
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};
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for (const data of this.allClassDataByKey.values()) {
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if (hasModifier(data.node, ts.SyntaxKind.DeclareKeyword)) {
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continue;
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}
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fields: for (const [name, info] of data.fields) {
|
|
if (!ClassData._shouldMangle(info.type)) {
|
|
continue fields;
|
|
}
|
|
// TS-HACK: protected became public via 'some' child
|
|
// and because of that we might need to ignore this now
|
|
let parent = data.parent;
|
|
while (parent) {
|
|
if (parent.fields.get(name)?.type === 0 /* FieldType.Public */) {
|
|
continue fields;
|
|
}
|
|
parent = parent.parent;
|
|
}
|
|
const newName = data.lookupShortName(name);
|
|
queueRename(data.fileName, info.pos, newName);
|
|
}
|
|
}
|
|
for (const data of this.allExportedSymbols.values()) {
|
|
if (data.fileName.endsWith('.d.ts')
|
|
|| skippedExportMangledProjects.some(proj => data.fileName.includes(proj))
|
|
|| skippedExportMangledFiles.some(file => data.fileName.endsWith(file + '.ts'))) {
|
|
continue;
|
|
}
|
|
if (!data.shouldMangle(data.replacementName)) {
|
|
continue;
|
|
}
|
|
const newText = data.replacementName;
|
|
for (const { fileName, offset } of data.getLocations(service)) {
|
|
queueRename(fileName, offset, newText);
|
|
}
|
|
}
|
|
await Promise.all(renameResults).then((result) => {
|
|
for (const { newName, locations } of result) {
|
|
for (const loc of locations) {
|
|
appendRename(newName, loc);
|
|
}
|
|
}
|
|
});
|
|
await this.renameWorkerPool.terminate();
|
|
this.log(`Done preparing edits: ${editsByFile.size} files`);
|
|
// STEP: apply all rename edits (per file)
|
|
const result = new Map();
|
|
let savedBytes = 0;
|
|
for (const item of service.getProgram().getSourceFiles()) {
|
|
const { mapRoot, sourceRoot } = service.getProgram().getCompilerOptions();
|
|
const projectDir = path.dirname(this.projectPath);
|
|
const sourceMapRoot = mapRoot ?? (0, url_1.pathToFileURL)(sourceRoot ?? projectDir).toString();
|
|
// source maps
|
|
let generator;
|
|
let newFullText;
|
|
const edits = editsByFile.get(item.fileName);
|
|
if (!edits) {
|
|
// just copy
|
|
newFullText = item.getFullText();
|
|
}
|
|
else {
|
|
// source map generator
|
|
const relativeFileName = normalize(path.relative(projectDir, item.fileName));
|
|
const mappingsByLine = new Map();
|
|
// apply renames
|
|
edits.sort((a, b) => b.offset - a.offset);
|
|
const characters = item.getFullText().split('');
|
|
let lastEdit;
|
|
for (const edit of edits) {
|
|
if (lastEdit && lastEdit.offset === edit.offset) {
|
|
//
|
|
if (lastEdit.length !== edit.length || lastEdit.newText !== edit.newText) {
|
|
this.log('ERROR: Overlapping edit', item.fileName, edit.offset, edits);
|
|
throw new Error('OVERLAPPING edit');
|
|
}
|
|
else {
|
|
continue;
|
|
}
|
|
}
|
|
lastEdit = edit;
|
|
const mangledName = characters.splice(edit.offset, edit.length, edit.newText).join('');
|
|
savedBytes += mangledName.length - edit.newText.length;
|
|
// source maps
|
|
const pos = item.getLineAndCharacterOfPosition(edit.offset);
|
|
let mappings = mappingsByLine.get(pos.line);
|
|
if (!mappings) {
|
|
mappings = [];
|
|
mappingsByLine.set(pos.line, mappings);
|
|
}
|
|
mappings.unshift({
|
|
source: relativeFileName,
|
|
original: { line: pos.line + 1, column: pos.character },
|
|
generated: { line: pos.line + 1, column: pos.character },
|
|
name: mangledName
|
|
}, {
|
|
source: relativeFileName,
|
|
original: { line: pos.line + 1, column: pos.character + edit.length },
|
|
generated: { line: pos.line + 1, column: pos.character + edit.newText.length },
|
|
});
|
|
}
|
|
// source map generation, make sure to get mappings per line correct
|
|
generator = new source_map_1.SourceMapGenerator({ file: path.basename(item.fileName), sourceRoot: sourceMapRoot });
|
|
generator.setSourceContent(relativeFileName, item.getFullText());
|
|
for (const [, mappings] of mappingsByLine) {
|
|
let lineDelta = 0;
|
|
for (const mapping of mappings) {
|
|
generator.addMapping({
|
|
...mapping,
|
|
generated: { line: mapping.generated.line, column: mapping.generated.column - lineDelta }
|
|
});
|
|
lineDelta += mapping.original.column - mapping.generated.column;
|
|
}
|
|
}
|
|
newFullText = characters.join('');
|
|
}
|
|
result.set(item.fileName, { out: newFullText, sourceMap: generator?.toString() });
|
|
}
|
|
service.dispose();
|
|
this.renameWorkerPool.terminate();
|
|
this.log(`Done: ${savedBytes / 1000}kb saved, memory-usage: ${JSON.stringify(v8.getHeapStatistics())}`);
|
|
return result;
|
|
}
|
|
}
|
|
exports.Mangler = Mangler;
|
|
// --- ast utils
|
|
function hasModifier(node, kind) {
|
|
const modifiers = ts.canHaveModifiers(node) ? ts.getModifiers(node) : undefined;
|
|
return Boolean(modifiers?.find(mode => mode.kind === kind));
|
|
}
|
|
function isInAmbientContext(node) {
|
|
for (let p = node.parent; p; p = p.parent) {
|
|
if (ts.isModuleDeclaration(p)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
function normalize(path) {
|
|
return path.replace(/\\/g, '/');
|
|
}
|
|
async function _run() {
|
|
const root = path.join(__dirname, '..', '..', '..');
|
|
const projectBase = path.join(root, 'src');
|
|
const projectPath = path.join(projectBase, 'tsconfig.json');
|
|
const newProjectBase = path.join(path.dirname(projectBase), path.basename(projectBase) + '2');
|
|
fs.cpSync(projectBase, newProjectBase, { recursive: true });
|
|
const mangler = new Mangler(projectPath, console.log, {
|
|
mangleExports: true,
|
|
manglePrivateFields: true,
|
|
});
|
|
for (const [fileName, contents] of await mangler.computeNewFileContents(new Set(['saveState']))) {
|
|
const newFilePath = path.join(newProjectBase, path.relative(projectBase, fileName));
|
|
await fs.promises.mkdir(path.dirname(newFilePath), { recursive: true });
|
|
await fs.promises.writeFile(newFilePath, contents.out);
|
|
if (contents.sourceMap) {
|
|
await fs.promises.writeFile(newFilePath + '.map', contents.sourceMap);
|
|
}
|
|
}
|
|
}
|
|
if (__filename === process_1.argv[1]) {
|
|
_run();
|
|
}
|
|
//# sourceMappingURL=index.js.map
|