Function validateProject

packages/schematics/angular/app-shell/index.ts:123–136

(mainPath: string)

// end helper functions.

function validateProject(mainPath: string): Rule {
  return (host: Tree) => {
    const routerOutletCheckRegex = /<router-outlet.*?>([\s\S]*?)(?:<\/router-outlet>)?/;

    const componentPath = getBootstrapComponentPath(host, mainPath);
    const tmpl = getComponentTemplateInfo(host, componentPath);
    const template = getComponentTemplate(host, componentPath, tmpl);
    if (!routerOutletCheckRegex.test(template)) {
      throw new SchematicsException(
        `Prerequisite for application shell is to define a router-outlet in your root component.`,
      );
    }
  };
}

function getMetadataProperty(metadata: ts.Node, propertyName: string): ts.PropertyAssignment {
  const properties = (metadata as ts.ObjectLiteralExpression).properties;