344 lines
8.8 KiB
TypeScript
344 lines
8.8 KiB
TypeScript
/*---------------------------------------------------------------------------------------------
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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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import * as ts from 'typescript';
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import { readFileSync, existsSync } from 'fs';
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import { resolve, dirname, join } from 'path';
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import { match } from 'minimatch';
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//
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// #############################################################################################
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//
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// A custom typescript checker for the specific task of detecting the use of certain types in a
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// layer that does not allow such use. For example:
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// - using DOM globals in common/node/electron-main layer (e.g. HTMLElement)
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// - using node.js globals in common/browser layer (e.g. process)
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//
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// Make changes to below RULES to lift certain files from these checks only if absolutely needed
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//
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// #############################################################################################
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//
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// Types we assume are present in all implementations of JS VMs (node.js, browsers)
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// Feel free to add more core types as you see needed if present in node.js and browsers
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const CORE_TYPES = [
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'require', // from our AMD loader
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'setTimeout',
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'clearTimeout',
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'setInterval',
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'clearInterval',
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'console',
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'Console',
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'Error',
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'ErrorConstructor',
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'String',
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'TextDecoder',
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'TextEncoder',
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'self',
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'queueMicrotask',
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'Array',
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'Uint8Array',
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'Uint16Array',
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'Uint32Array',
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'Int8Array',
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'Int16Array',
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'Int32Array',
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'Float32Array',
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'Float64Array',
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'Uint8ClampedArray',
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'BigUint64Array',
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'BigInt64Array',
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'btoa',
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'atob',
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'AbortSignal',
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'MessageChannel',
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'MessagePort',
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'URL',
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'URLSearchParams',
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'ReadonlyArray',
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'Event',
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'EventTarget',
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'BroadcastChannel',
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'performance',
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'Blob'
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];
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// Types that are defined in a common layer but are known to be only
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// available in native environments should not be allowed in browser
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const NATIVE_TYPES = [
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'NativeParsedArgs',
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'INativeEnvironmentService',
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'AbstractNativeEnvironmentService',
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'INativeWindowConfiguration',
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'ICommonNativeHostService'
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];
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const RULES: IRule[] = [
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// Tests: skip
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{
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target: '**/vs/**/test/**',
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skip: true // -> skip all test files
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},
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// Common: vs/base/common/platform.ts
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{
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target: '**/vs/base/common/platform.ts',
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allowedTypes: [
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...CORE_TYPES,
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// Safe access to postMessage() and friends
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'MessageEvent',
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],
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disallowedTypes: NATIVE_TYPES,
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disallowedDefinitions: [
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'lib.dom.d.ts', // no DOM
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'@types/node' // no node.js
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]
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},
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// Common: vs/platform/environment/common/*
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{
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target: '**/vs/platform/environment/common/*.ts',
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allowedTypes: CORE_TYPES,
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disallowedTypes: [/* Ignore native types that are defined from here */],
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disallowedDefinitions: [
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'lib.dom.d.ts', // no DOM
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'@types/node' // no node.js
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]
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},
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// Common: vs/platform/window/common/window.ts
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{
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target: '**/vs/platform/window/common/window.ts',
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allowedTypes: CORE_TYPES,
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disallowedTypes: [/* Ignore native types that are defined from here */],
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disallowedDefinitions: [
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'lib.dom.d.ts', // no DOM
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'@types/node' // no node.js
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]
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},
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// Common: vs/platform/native/common/native.ts
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{
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target: '**/vs/platform/native/common/native.ts',
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allowedTypes: CORE_TYPES,
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disallowedTypes: [/* Ignore native types that are defined from here */],
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disallowedDefinitions: [
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'lib.dom.d.ts', // no DOM
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'@types/node' // no node.js
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]
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},
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// Common: vs/workbench/api/common/extHostExtensionService.ts
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{
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target: '**/vs/workbench/api/common/extHostExtensionService.ts',
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allowedTypes: [
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...CORE_TYPES,
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// Safe access to global
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'global'
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],
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disallowedTypes: NATIVE_TYPES,
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disallowedDefinitions: [
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'lib.dom.d.ts', // no DOM
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'@types/node' // no node.js
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]
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},
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// Common
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{
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target: '**/vs/**/common/**',
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allowedTypes: CORE_TYPES,
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disallowedTypes: NATIVE_TYPES,
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disallowedDefinitions: [
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'lib.dom.d.ts', // no DOM
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'@types/node' // no node.js
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]
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},
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// Browser
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{
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target: '**/vs/**/browser/**',
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allowedTypes: CORE_TYPES,
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disallowedTypes: NATIVE_TYPES,
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allowedDefinitions: [
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'@types/node/stream/consumers.d.ts' // node.js started to duplicate types from lib.dom.d.ts so we have to account for that
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],
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disallowedDefinitions: [
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'@types/node' // no node.js
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]
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},
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// Browser (editor contrib)
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{
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target: '**/src/vs/editor/contrib/**',
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allowedTypes: CORE_TYPES,
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disallowedTypes: NATIVE_TYPES,
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disallowedDefinitions: [
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'@types/node' // no node.js
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]
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},
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// node.js
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{
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target: '**/vs/**/node/**',
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allowedTypes: CORE_TYPES,
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disallowedDefinitions: [
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'lib.dom.d.ts' // no DOM
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]
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},
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// Electron (sandbox)
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{
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target: '**/vs/**/electron-sandbox/**',
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allowedTypes: CORE_TYPES,
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disallowedDefinitions: [
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'@types/node' // no node.js
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]
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},
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// Electron (renderer): skip
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{
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target: '**/vs/**/electron-browser/**',
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skip: true // -> supports all types
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},
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// Electron (main)
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{
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target: '**/vs/**/electron-main/**',
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allowedTypes: [
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...CORE_TYPES,
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// --> types from electron.d.ts that duplicate from lib.dom.d.ts
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'Event',
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'Request'
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],
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disallowedTypes: [
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'ipcMain' // not allowed, use validatedIpcMain instead
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],
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disallowedDefinitions: [
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'lib.dom.d.ts' // no DOM
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]
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}
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];
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const TS_CONFIG_PATH = join(__dirname, '../../', 'src', 'tsconfig.json');
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interface IRule {
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target: string;
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skip?: boolean;
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allowedTypes?: string[];
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allowedDefinitions?: string[];
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disallowedDefinitions?: string[];
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disallowedTypes?: string[];
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}
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let hasErrors = false;
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function checkFile(program: ts.Program, sourceFile: ts.SourceFile, rule: IRule) {
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checkNode(sourceFile);
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function checkNode(node: ts.Node): void {
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if (node.kind !== ts.SyntaxKind.Identifier) {
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return ts.forEachChild(node, checkNode); // recurse down
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}
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const checker = program.getTypeChecker();
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const symbol = checker.getSymbolAtLocation(node);
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if (!symbol) {
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return;
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}
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let _parentSymbol: any = symbol;
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while (_parentSymbol.parent) {
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_parentSymbol = _parentSymbol.parent;
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}
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const parentSymbol = _parentSymbol as ts.Symbol;
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const text = parentSymbol.getName();
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if (rule.allowedTypes?.some(allowed => allowed === text)) {
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return; // override
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}
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if (rule.disallowedTypes?.some(disallowed => disallowed === text)) {
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const { line, character } = sourceFile.getLineAndCharacterOfPosition(node.getStart());
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console.log(`[build/lib/layersChecker.ts]: Reference to type '${text}' violates layer '${rule.target}' (${sourceFile.fileName} (${line + 1},${character + 1})`);
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hasErrors = true;
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return;
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}
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const declarations = symbol.declarations;
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if (Array.isArray(declarations)) {
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DeclarationLoop: for (const declaration of declarations) {
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if (declaration) {
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const parent = declaration.parent;
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if (parent) {
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const parentSourceFile = parent.getSourceFile();
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if (parentSourceFile) {
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const definitionFileName = parentSourceFile.fileName;
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if (rule.allowedDefinitions) {
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for (const allowedDefinition of rule.allowedDefinitions) {
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if (definitionFileName.indexOf(allowedDefinition) >= 0) {
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continue DeclarationLoop;
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}
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}
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}
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if (rule.disallowedDefinitions) {
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for (const disallowedDefinition of rule.disallowedDefinitions) {
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if (definitionFileName.indexOf(disallowedDefinition) >= 0) {
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const { line, character } = sourceFile.getLineAndCharacterOfPosition(node.getStart());
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console.log(`[build/lib/layersChecker.ts]: Reference to symbol '${text}' from '${disallowedDefinition}' violates layer '${rule.target}' (${sourceFile.fileName} (${line + 1},${character + 1})`);
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hasErrors = true;
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return;
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}
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}
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}
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}
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}
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}
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}
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}
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}
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}
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function createProgram(tsconfigPath: string): ts.Program {
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const tsConfig = ts.readConfigFile(tsconfigPath, ts.sys.readFile);
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const configHostParser: ts.ParseConfigHost = { fileExists: existsSync, readDirectory: ts.sys.readDirectory, readFile: file => readFileSync(file, 'utf8'), useCaseSensitiveFileNames: process.platform === 'linux' };
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const tsConfigParsed = ts.parseJsonConfigFileContent(tsConfig.config, configHostParser, resolve(dirname(tsconfigPath)), { noEmit: true });
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const compilerHost = ts.createCompilerHost(tsConfigParsed.options, true);
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return ts.createProgram(tsConfigParsed.fileNames, tsConfigParsed.options, compilerHost);
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}
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//
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// Create program and start checking
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//
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const program = createProgram(TS_CONFIG_PATH);
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for (const sourceFile of program.getSourceFiles()) {
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for (const rule of RULES) {
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if (match([sourceFile.fileName], rule.target).length > 0) {
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if (!rule.skip) {
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checkFile(program, sourceFile, rule);
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}
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break;
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}
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}
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}
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if (hasErrors) {
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process.exit(1);
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}
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