flutter_flutter/dev/integration_tests/link_hook/hook/build.dart

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:code_assets/code_assets.dart';
import 'package:hooks/hooks.dart';
import 'package:logging/logging.dart';
import 'package:native_toolchain_c/native_toolchain_c.dart';

void main(List<String> args) async {
  await build(args, (BuildInput input, BuildOutputBuilder output) async {
    if (!input.config.buildCodeAssets) {
      return;
    }

    final String assetName;
    if (input.config.linkingEnabled) {
      // The link hook will be run. So emit an asset with a name that is
      // not used, so that the link hook can rename it.
      // This will ensure the test fails if the link-hooks are not run
      // while being reported that linking is enabled.
      assetName = 'some_asset_name_that_is_not_used';
    } else {
      // The link hook will not be run, so immediately emit an asset for
      // bundling.
      assetName = '${input.packageName}_bindings_generated.dart';
    }
    final String packageName = input.packageName;
    final CBuilder cbuilder = CBuilder.library(
      name: packageName,
      assetName: assetName,
      sources: <String>['src/$packageName.c'],
      dartBuildFiles: <String>['hook/build.dart'],
    );
    final BuildOutputBuilder outputCatcher = BuildOutputBuilder();
    await cbuilder.run(
      input: input,
      output: outputCatcher,
      logger: Logger('')
        ..level = Level.ALL
        ..onRecord.listen((LogRecord record) => print(record.message)),
    );
    final BuildOutput caughtOutput = BuildOutput(outputCatcher.json);
    output.addDependencies(caughtOutput.dependencies);
    // Send the asset to hook/link.dart or immediately for bundling.
    output.assets.code.add(
      caughtOutput.assets.code.single,
      routing: input.config.linkingEnabled ? const ToLinkHook('link_hook') : const ToAppBundle(),
    );
  });
}