Function readIntoSourceFile

src/cdk/schematics/utils/build-component.ts:59–66

(host: Tree, modulePath: string)

const supportedCssExtensions = ['css', 'scss', 'less'];

function readIntoSourceFile(host: Tree, modulePath: string) {
  const text = host.read(modulePath);
  if (text === null) {
    throw new SchematicsException(`File ${modulePath} does not exist.`);
  }

  return ts.createSourceFile(modulePath, text.toString('utf-8'), ts.ScriptTarget.Latest, true);
}

function addDeclarationToNgModule(options: ComponentOptions): Rule {
  return (host: Tree) => {