build.yaml

# This configures how `build_runner` and associated builders should behave.
# For more information, see https://pub.dev/packages/build_config

targets:
  $default:
    # Reducing sources makes the build slightly faster (some of these are required
    # to exist in the default target).
    sources:
      - lib/**
      - web/**
      - 'tool/**'
      - pubspec.yaml
      - lib/$lib$
      - $package$
    builders:
      drift_dev:
        # These options change how drift generates code
        options:
          # Drift analyzes SQL queries at compile-time. For this purpose, it needs to know which sqlite3
          # features will be available. We depend on `sqlite3_flutter_libs`, which lets us use the latest
          # version with fts5 enabled.
          sql:
            dialect: sqlite
            options:
              version: '3.38'
              modules: [fts5]

      # Configuring this builder isn't required for most apps. In our case, we
      # want to compile the web worker in `web/worker.dart` to JS and we use the
      # build system for that.
      build_web_compilers:entrypoint:
        generate_for:
          - web/worker.dart
        options:
          compiler: dart2js

  # JS outputs by the build system are private, we use a `build_to: source` builder
  # afterwards to make them visible in `web/`.
  copy_js:
    auto_apply_builders: false
    dependencies: [$default]
    builders:
      ':copy_compiled_worker_js':
        enabled: true

# build_web_compilers writes a hidden asset, but we want an asset in `web/` for
# flutter to see. So, copy that output. Again, this is not needed for most apps.
builders:
  copy_compiled_worker_js:
    import: 'tool/builder.dart'
    builder_factories: ['CopyCompiledJs.new']
    build_to: source
    build_extensions: { 'web/worker.dart.js': ['web/drift_worker.js'] }