/
index.ts
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/
index.ts
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/**
* @license
* Copyright Google LLC 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 { join, normalize, tags } from '@angular-devkit/core';
import {
Rule,
SchematicContext,
SchematicsException,
Tree,
apply,
applyTemplates,
chain,
mergeWith,
move,
url,
} from '@angular-devkit/schematics';
import { NodePackageInstallTask } from '@angular-devkit/schematics/tasks';
import * as ts from '../third_party/github.com/Microsoft/TypeScript/lib/typescript';
import { readWorkspace, writeWorkspace } from '../utility';
import { addSymbolToNgModuleMetadata, insertImport } from '../utility/ast-utils';
import { applyToUpdateRecorder } from '../utility/change';
import { addPackageJsonDependency, getPackageJsonDependency } from '../utility/dependencies';
import { getAppModulePath } from '../utility/ng-ast-utils';
import { relativePathToWorkspaceRoot } from '../utility/paths';
import { targetBuildNotFoundError } from '../utility/project-targets';
import { BrowserBuilderOptions } from '../utility/workspace-models';
import { Schema as ServiceWorkerOptions } from './schema';
function addDependencies(): Rule {
return (host: Tree, context: SchematicContext) => {
const packageName = '@angular/service-worker';
context.logger.debug(`adding dependency (${packageName})`);
const coreDep = getPackageJsonDependency(host, '@angular/core');
if (coreDep === null) {
throw new SchematicsException('Could not find version.');
}
const serviceWorkerDep = {
...coreDep,
name: packageName,
};
addPackageJsonDependency(host, serviceWorkerDep);
return host;
};
}
function updateAppModule(mainPath: string): Rule {
return (host: Tree, context: SchematicContext) => {
context.logger.debug('Updating appmodule');
const modulePath = getAppModulePath(host, mainPath);
context.logger.debug(`module path: ${modulePath}`);
addImport(host, modulePath, 'ServiceWorkerModule', '@angular/service-worker');
addImport(host, modulePath, 'isDevMode', '@angular/core');
// register SW in application module
const importText = tags.stripIndent`
ServiceWorkerModule.register('ngsw-worker.js', {
enabled: !isDevMode(),
// Register the ServiceWorker as soon as the application is stable
// or after 30 seconds (whichever comes first).
registrationStrategy: 'registerWhenStable:30000'
})
`;
const moduleSource = getTsSourceFile(host, modulePath);
const metadataChanges = addSymbolToNgModuleMetadata(
moduleSource,
modulePath,
'imports',
importText,
);
if (metadataChanges) {
const recorder = host.beginUpdate(modulePath);
applyToUpdateRecorder(recorder, metadataChanges);
host.commitUpdate(recorder);
}
return host;
};
}
function getTsSourceFile(host: Tree, path: string): ts.SourceFile {
const content = host.readText(path);
const source = ts.createSourceFile(path, content, ts.ScriptTarget.Latest, true);
return source;
}
export default function (options: ServiceWorkerOptions): Rule {
return async (host: Tree, context: SchematicContext) => {
const workspace = await readWorkspace(host);
const project = workspace.projects.get(options.project);
if (!project) {
throw new SchematicsException(`Invalid project name (${options.project})`);
}
if (project.extensions.projectType !== 'application') {
throw new SchematicsException(`Service worker requires a project type of "application".`);
}
const buildTarget = project.targets.get('build');
if (!buildTarget) {
throw targetBuildNotFoundError();
}
const buildOptions = (buildTarget.options || {}) as unknown as BrowserBuilderOptions;
const root = project.root;
buildOptions.serviceWorker = true;
buildOptions.ngswConfigPath = join(normalize(root), 'ngsw-config.json');
let { resourcesOutputPath = '' } = buildOptions;
if (resourcesOutputPath) {
resourcesOutputPath = normalize(`/${resourcesOutputPath}`);
}
const templateSource = apply(url('./files'), [
applyTemplates({
...options,
resourcesOutputPath,
relativePathToWorkspaceRoot: relativePathToWorkspaceRoot(project.root),
}),
move(project.root),
]);
context.addTask(new NodePackageInstallTask());
await writeWorkspace(host, workspace);
return chain([
mergeWith(templateSource),
addDependencies(),
updateAppModule(buildOptions.main),
]);
};
}
function addImport(host: Tree, filePath: string, symbolName: string, moduleName: string): void {
const moduleSource = getTsSourceFile(host, filePath);
const change = insertImport(moduleSource, filePath, symbolName, moduleName);
if (change) {
const recorder = host.beginUpdate(filePath);
applyToUpdateRecorder(recorder, [change]);
host.commitUpdate(recorder);
}
}