fix(ngcc): correctly detect dependencies in CommonJS (#34528)
Previously, `CommonJsDependencyHost.collectDependencies()` would only
find dependencies via imports of the form `var foo = require('...');` or
`var foo = require('...'), bar = require('...');` However, CommonJS
files can have imports in many different forms. By failing to recognize
other forms of imports, the associated dependencies were missed, which
in turn resulted in entry-points being compiled out-of-order and failing
due to that.
While we cannot easily capture all different types of imports, this
commit enhances `CommonJsDependencyHost` to recognize the following
common forms of imports:
- Imports in property assignments. E.g.:
`exports.foo = require('...');` or
`module.exports = {foo: require('...')};`
- Imports for side-effects only. E.g.:
`require('...');`
- Star re-exports (with both emitted and imported heleprs). E.g.:
`__export(require('...'));` or
`tslib_1.__exportStar(require('...'), exports);`
PR Close #34528
This commit is contained in:
George Kalpakas
atscott
parent
eb6e1af46d
commit
cfbb1a1e77
@ -7,7 +7,7 @@
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*/
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import * as ts from 'typescript';
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import {AbsoluteFsPath} from '../../../src/ngtsc/file_system';
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import {isRequireCall} from '../host/commonjs_umd_utils';
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import {RequireCall, isReexportStatement, isRequireCall} from '../host/commonjs_umd_utils';
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import {DependencyHostBase} from './dependency_host';
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import {ResolvedDeepImport, ResolvedRelativeModule} from './module_resolver';
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@ -40,35 +40,74 @@ export class CommonJsDependencyHost extends DependencyHostBase {
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// Parse the source into a TypeScript AST and then walk it looking for imports and re-exports.
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const sf =
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ts.createSourceFile(file, fromContents, ts.ScriptTarget.ES2015, false, ts.ScriptKind.JS);
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const requireCalls: RequireCall[] = [];
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for (const statement of sf.statements) {
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const declarations =
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ts.isVariableStatement(statement) ? statement.declarationList.declarations : [];
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for (const stmt of sf.statements) {
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if (ts.isVariableStatement(stmt)) {
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// Regular import(s):
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// `var foo = require('...')` or `var foo = require('...'), bar = require('...')`
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const declarations = stmt.declarationList.declarations;
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for (const declaration of declarations) {
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if (declaration.initializer && isRequireCall(declaration.initializer)) {
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const importPath = declaration.initializer.arguments[0].text;
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if ((declaration.initializer !== undefined) && isRequireCall(declaration.initializer)) {
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requireCalls.push(declaration.initializer);
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}
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}
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} else if (ts.isExpressionStatement(stmt)) {
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if (isRequireCall(stmt.expression)) {
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// Import for the side-effects only:
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// `require('...')`
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requireCalls.push(stmt.expression);
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} else if (isReexportStatement(stmt)) {
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// Re-export in one of the following formats:
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// - `__export(require('...'))`
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// - `__export(<identifier>)`
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// - `tslib_1.__exportStar(require('...'), exports)`
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// - `tslib_1.__exportStar(<identifier>, exports)`
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const firstExportArg = stmt.expression.arguments[0];
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if (isRequireCall(firstExportArg)) {
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// Re-export with `require()` call:
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// `__export(require('...'))` or `tslib_1.__exportStar(require('...'), exports)`
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requireCalls.push(firstExportArg);
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}
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} else if (
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ts.isBinaryExpression(stmt.expression) &&
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(stmt.expression.operatorToken.kind === ts.SyntaxKind.EqualsToken)) {
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if (isRequireCall(stmt.expression.right)) {
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// Import with assignment. E.g.:
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// `exports.foo = require('...')`
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requireCalls.push(stmt.expression.right);
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} else if (ts.isObjectLiteralExpression(stmt.expression.right)) {
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// Import in object literal. E.g.:
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// `module.exports = {foo: require('...')}`
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stmt.expression.right.properties.forEach(prop => {
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if (ts.isPropertyAssignment(prop) && isRequireCall(prop.initializer)) {
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requireCalls.push(prop.initializer);
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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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const importPaths = new Set(requireCalls.map(call => call.arguments[0].text));
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for (const importPath of importPaths) {
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const resolvedModule = this.moduleResolver.resolveModuleImport(importPath, file);
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if (resolvedModule) {
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if (resolvedModule instanceof ResolvedRelativeModule) {
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if (resolvedModule === null) {
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missing.add(importPath);
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} else if (resolvedModule instanceof ResolvedRelativeModule) {
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const internalDependency = resolvedModule.modulePath;
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if (!alreadySeen.has(internalDependency)) {
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alreadySeen.add(internalDependency);
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this.recursivelyCollectDependencies(
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internalDependency, dependencies, missing, deepImports, alreadySeen);
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}
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} else {
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if (resolvedModule instanceof ResolvedDeepImport) {
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} else if (resolvedModule instanceof ResolvedDeepImport) {
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deepImports.add(resolvedModule.importPath);
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} else {
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dependencies.add(resolvedModule.entryPointPath);
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}
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}
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} else {
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missing.add(importPath);
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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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@ -143,6 +143,142 @@ runInEachFileSystem(() => {
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expect(dependencies.has(_('/node_modules/lib_1/sub_1'))).toBe(true);
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});
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it('should recognize imports in a variable declaration list', () => {
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loadTestFiles([
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{
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name: _('/test/index.js'),
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contents: commonJs({
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varDeclarations: [
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['lib_1/sub_1', 'lib_1/sub_2'],
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],
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}),
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},
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{name: _('/test/package.json'), contents: '{"main": "./index.js"}'},
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{name: _('/test/index.metadata.json'), contents: 'MOCK METADATA'},
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]);
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const {dependencies, missing, deepImports} = createDependencyInfo();
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host.collectDependencies(_('/test/index.js'), {dependencies, missing, deepImports});
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expect(dependencies.size).toBe(2);
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expect(missing.size).toBe(0);
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expect(deepImports.size).toBe(0);
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expect(dependencies.has(_('/node_modules/lib_1/sub_1'))).toBe(true);
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expect(dependencies.has(_('/node_modules/lib_1/sub_2'))).toBe(true);
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});
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it('should recognize imports as property assignments (on existing object)', () => {
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loadTestFiles([
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{
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name: _('/test/index.js'),
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contents: commonJs({
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propAssignment: ['lib_1/sub_1', 'lib_1/sub_2'],
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}),
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},
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{name: _('/test/package.json'), contents: '{"main": "./index.js"}'},
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{name: _('/test/index.metadata.json'), contents: 'MOCK METADATA'},
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]);
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const {dependencies, missing, deepImports} = createDependencyInfo();
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host.collectDependencies(_('/test/index.js'), {dependencies, missing, deepImports});
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expect(dependencies.size).toBe(2);
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expect(missing.size).toBe(0);
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expect(deepImports.size).toBe(0);
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expect(dependencies.has(_('/node_modules/lib_1/sub_1'))).toBe(true);
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expect(dependencies.has(_('/node_modules/lib_1/sub_2'))).toBe(true);
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});
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it('should recognize imports as property assignments (in object literal)', () => {
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loadTestFiles([
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{
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name: _('/test/index.js'),
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contents: commonJs({
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inObjectLiteral: ['lib_1/sub_1', 'lib_1/sub_2'],
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}),
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},
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{name: _('/test/package.json'), contents: '{"main": "./index.js"}'},
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{name: _('/test/index.metadata.json'), contents: 'MOCK METADATA'},
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]);
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const {dependencies, missing, deepImports} = createDependencyInfo();
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host.collectDependencies(_('/test/index.js'), {dependencies, missing, deepImports});
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expect(dependencies.size).toBe(2);
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expect(missing.size).toBe(0);
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expect(deepImports.size).toBe(0);
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expect(dependencies.has(_('/node_modules/lib_1/sub_1'))).toBe(true);
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expect(dependencies.has(_('/node_modules/lib_1/sub_2'))).toBe(true);
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});
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it('should recognize imports used for their side-effects only', () => {
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loadTestFiles([
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{
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name: _('/test/index.js'),
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contents: commonJs({
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forSideEffects: ['lib_1/sub_1', 'lib_1/sub_2'],
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}),
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},
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{name: _('/test/package.json'), contents: '{"main": "./index.js"}'},
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{name: _('/test/index.metadata.json'), contents: 'MOCK METADATA'},
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]);
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const {dependencies, missing, deepImports} = createDependencyInfo();
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host.collectDependencies(_('/test/index.js'), {dependencies, missing, deepImports});
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expect(dependencies.size).toBe(2);
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expect(missing.size).toBe(0);
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expect(deepImports.size).toBe(0);
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expect(dependencies.has(_('/node_modules/lib_1/sub_1'))).toBe(true);
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expect(dependencies.has(_('/node_modules/lib_1/sub_2'))).toBe(true);
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});
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it('should recognize star re-exports (with both emitted and imported helpers)', () => {
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loadTestFiles([
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{
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name: _('/test/index.js'),
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contents: commonJs({
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reExportsWithEmittedHelper: ['lib_1', 'lib_1/sub_1'],
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reExportsWithImportedHelper: ['lib_1', 'lib_1/sub_2'],
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}),
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},
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{name: _('/test/package.json'), contents: '{"main": "./index.js"}'},
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{name: _('/test/index.metadata.json'), contents: 'MOCK METADATA'},
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]);
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const {dependencies, missing, deepImports} = createDependencyInfo();
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host.collectDependencies(_('/test/index.js'), {dependencies, missing, deepImports});
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expect(dependencies.size).toBe(3);
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expect(missing.size).toBe(0);
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expect(deepImports.size).toBe(0);
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expect(dependencies.has(_('/node_modules/lib_1'))).toBe(true);
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expect(dependencies.has(_('/node_modules/lib_1/sub_1'))).toBe(true);
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expect(dependencies.has(_('/node_modules/lib_1/sub_2'))).toBe(true);
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});
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it('should not get confused by re-exports with a separate `require()` call', () => {
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loadTestFiles([
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{
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name: _('/test/index.js'),
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contents: commonJs({
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reExportsWithoutRequire: ['lib_1', 'lib_1/sub_2'],
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}),
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},
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{name: _('/test/package.json'), contents: '{"main": "./index.js"}'},
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{name: _('/test/index.metadata.json'), contents: 'MOCK METADATA'},
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]);
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const {dependencies, missing, deepImports} = createDependencyInfo();
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host.collectDependencies(_('/test/index.js'), {dependencies, missing, deepImports});
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expect(dependencies.size).toBe(2);
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expect(missing.size).toBe(0);
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expect(deepImports.size).toBe(0);
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expect(dependencies.has(_('/node_modules/lib_1'))).toBe(true);
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expect(dependencies.has(_('/node_modules/lib_1/sub_2'))).toBe(true);
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});
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it('should capture missing external imports', () => {
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const {dependencies, missing, deepImports} = createDependencyInfo();
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host.collectDependencies(
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@ -224,16 +360,102 @@ runInEachFileSystem(() => {
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});
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});
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function commonJs(importPaths: string[], exportNames: string[] = []) {
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const commonJsRequires =
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importPaths
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.map(
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p =>
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`var ${p.replace('@angular/', '').replace(/\.?\.?\//g, '').replace(/@/,'')} = require('${p}');`)
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.join('\n');
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interface ImportsPerType {
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// var foo = require('...');
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varDeclaration?: string[];
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// var foo = require('...'), bar = require('...');
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varDeclarations?: string[][];
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// exports.foo = require('...');
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propAssignment?: string[];
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// module.exports = {foo: require('...')};
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inObjectLiteral?: string[];
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// require('...');
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forSideEffects?: string[];
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// __export(require('...'));
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reExportsWithEmittedHelper?: string[];
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// tslib_1.__exportStar(require('...'), exports);
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reExportsWithImportedHelper?: string[];
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// var foo = require('...');
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// __export(foo);
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reExportsWithoutRequire?: string[];
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}
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function commonJs(importsPerType: ImportsPerType | string[], exportNames: string[] = []): string {
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if (Array.isArray(importsPerType)) {
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importsPerType = {varDeclaration: importsPerType};
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}
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const importStatements = generateImportStatements(importsPerType);
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const exportStatements =
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exportNames.map(e => ` exports.${e.replace(/.+\./, '')} = ${e};`).join('\n');
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return `${commonJsRequires}
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${exportStatements}`;
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exportNames.map(e => `exports.${e.replace(/.+\./, '')} = ${e};`).join('\n');
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return `${importStatements}\n\n${exportStatements}`;
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}
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function generateImportStatements(importsPerType: ImportsPerType): string {
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const importStatements: string[] = [];
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const {
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varDeclaration: importsOfTypeVarDeclaration = [],
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varDeclarations: importsOfTypeVarDeclarations = [],
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propAssignment: importsOfTypePropAssignment = [],
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inObjectLiteral: importsOfTypeInObjectLiteral = [],
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forSideEffects: importsOfTypeForSideEffects = [],
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reExportsWithEmittedHelper: importsOfTypeReExportsWithEmittedHelper = [],
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reExportsWithImportedHelper: importsOfTypeReExportsWithImportedHelper = [],
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reExportsWithoutRequire: importsOfTypeReExportsWithoutRequire = [],
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} = importsPerType;
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// var foo = require('...');
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importsOfTypeVarDeclaration.forEach(
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p => { importStatements.push(`var ${pathToVarName(p)} = require('${p}');`); });
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// var foo = require('...'), bar = require('...');
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importsOfTypeVarDeclarations.forEach(pp => {
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const declarations = pp.map(p => `${pathToVarName(p)} = require('${p}')`);
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importStatements.push(`var ${declarations.join(', ')};`);
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});
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// exports.foo = require('...');
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importsOfTypePropAssignment.forEach(
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p => { importStatements.push(`exports.${pathToVarName(p)} = require('${p}');`); });
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// module.exports = {foo: require('...')};
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const propAssignments =
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importsOfTypeInObjectLiteral.map(p => `\n ${pathToVarName(p)}: require('${p}')`)
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.join(', ');
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importStatements.push(`module.exports = {${propAssignments}\n};`);
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// require('...');
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importsOfTypeForSideEffects.forEach(p => { importStatements.push(`require('${p}');`); });
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// __export(require('...'));
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importsOfTypeReExportsWithEmittedHelper.forEach(
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p => { importStatements.push(`__export(require('${p}'));`); });
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// tslib_1.__exportStar(require('...'), exports);
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importsOfTypeReExportsWithImportedHelper.forEach(
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p => { importStatements.push(`tslib_1.__exportStar(require('${p}'), exports);`); });
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// var foo = require('...');
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// __export(foo);
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importsOfTypeReExportsWithoutRequire.forEach(p => {
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const varName = pathToVarName(p);
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importStatements.push(`var ${varName} = require('${p}');`);
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importStatements.push(`__export(varName);`);
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});
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return importStatements.join('\n');
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}
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function pathToVarName(path: string): string {
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return path.replace(/^@(angular\/)?/, '').replace(/\.{0,2}\//g, '');
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}
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});
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