Function createIfMissing

packages/schematics/angular/environments/index.ts:56–64

(path: string)

}

function createIfMissing(path: string): Rule {
  return (tree, context) => {
    if (tree.exists(path)) {
      context.logger.info(`Skipping creation of already existing environment file "${path}".`);
    } else {
      tree.create(path, ENVIRONMENT_FILE_CONTENT);
    }
  };
}

function log(type: 'info' | 'warn' | 'error', text: string): Rule {
  return (_, context) => context.logger[type](text);