A small set of utilities for Dart code-generation scripts that need to load source data from a local file cache or a remote URL.

Features

• loadData — transparent cache helper: serves from a local file when it exists, otherwise fetches from a URL and writes the result to disk.
• loadFromLocalFile — read a local file as a String.
• loadFromUrl — fetch a URL, optionally decompress a ZIP archive entry, and persist the result to a local cache file.
• CompressionType — none (default) or zip.
• dartfmt — a pre-configured DartFormatter instance (latest language version) ready to format generated source code.

Getting started

Add the dependency to your pubspec.yaml (typically under dev_dependencies for build / codegen scripts):

dev_dependencies:
  betto_builder_tools: ^0.1.0

Usage

Load from a cache or remote URL

import 'package:betto_builder_tools/betto_builder_tools.dart';

Future<void> main() async {
  // Fetches from the URL on first run; uses the local file on subsequent runs.
  final data = await loadData(
    'data/schema.json',
    'https://example.com/schema.json',
  );

  // ZIP archive — extract a specific entry
  final csv = await loadData(
    'data/records.csv',
    'https://example.com/records.zip',
    compression: CompressionType.zip,
    archiveFilePath: 'export/records.csv',
  );

  // Force re-fetch even if the local file exists
  final fresh = await loadData(
    'data/schema.json',
    'https://example.com/schema.json',
    force: true,
  );
}

Format generated Dart source

import 'package:betto_builder_tools/betto_builder_tools.dart';

final source = dartfmt.format(generatedCode);