79 lines
2.7 KiB
TypeScript
79 lines
2.7 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {Rule, SchematicContext, SchematicsException, Tree, chain, noop} from '@angular-devkit/schematics';
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import {NodePackageInstallTask} from '@angular-devkit/schematics/tasks';
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import {NodeDependencyType, addPackageJsonDependency} from '@schematics/angular/utility/dependencies';
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import {getWorkspace} from '@schematics/angular/utility/workspace';
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import {Schema} from './schema';
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export default function(options: Schema): Rule {
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return chain([
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options && options.skipPackageJson ? noop() : addPolyfillDependency(),
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addPolyfill(options),
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]);
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}
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/** Adds a package.json dependency for document-register-element */
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function addPolyfillDependency(): Rule {
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return (host: Tree, context: SchematicContext) => {
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addPackageJsonDependency(host, {
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type: NodeDependencyType.Default,
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name: 'document-register-element',
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version: '^1.7.2',
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});
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context.logger.info('Added "document-register-element" as a dependency.');
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// Install the dependency
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context.addTask(new NodePackageInstallTask());
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};
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}
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/** Adds the document-register-element.js to the polyfills file. */
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function addPolyfill(options: Schema): Rule {
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return async(host: Tree, context: SchematicContext) => {
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const projectName = options.project;
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if (!projectName) {
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throw new SchematicsException('Option "project" is required.');
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}
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const workspace = await getWorkspace(host);
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const project = workspace.projects.get(projectName);
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if (!project) {
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throw new SchematicsException(`Project ${projectName} is not defined in this workspace.`);
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}
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if (project.extensions['projectType'] !== 'application') {
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throw new SchematicsException(
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`@angular/elements requires a project type of "application" but ${projectName} isn't.`);
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}
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const buildTarget = project.targets.get('build');
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if (!buildTarget || !buildTarget.options) {
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throw new SchematicsException(`Cannot find 'options' for ${projectName} build target.`);
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}
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const {polyfills} = buildTarget.options;
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if (typeof polyfills !== 'string') {
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throw new SchematicsException(`polyfills for ${projectName} build target is not a string.`);
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}
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const content = host.read(polyfills).toString();
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if (!content.includes('document-register-element')) {
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// Add string at the end of the file.
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const recorder = host.beginUpdate(polyfills);
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recorder.insertRight(content.length, `import 'document-register-element';\n`);
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host.commitUpdate(recorder);
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}
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context.logger.info('Added "document-register-element" to polyfills.');
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};
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}
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