angular-cn/packages/elements/schematics/ng-add/index.ts

79 lines
2.7 KiB
TypeScript

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