[native_assets_builder] Fail early on too old native_assets_cli

.github/workflows/native.yaml

@@ -72,6 +72,9 @@ jobs:
       - run: dart pub get -C test_data/native_add_version_skew/
         if: ${{ matrix.package == 'native_assets_builder' }}
 
+      - run: dart pub get -C test_data/native_add_version_skew_2/
+        if: ${{ matrix.package == 'native_assets_builder' }}
+
       - run: dart pub get -C test_data/native_subtract/
         if: ${{ matrix.package == 'native_assets_builder' }}
 
@@ -105,6 +108,9 @@ jobs:
       - run: dart pub get -C test_data/native_dynamic_linking/
         if: ${{ matrix.package == 'native_assets_builder' }}
 
+      - run: dart pub get -C test_data/no_hook/
+        if: ${{ matrix.package == 'native_assets_builder' }}
+
       - run: dart pub get -C example/build/download_asset/
         if: ${{ matrix.package == 'native_assets_cli' }}
 

pkgs/native_assets_builder/lib/src/build_runner/build_runner.dart

@@ -11,6 +11,7 @@ import 'package:logging/logging.dart';
 import 'package:meta/meta.dart';
 import 'package:native_assets_cli/native_assets_cli_internal.dart';
 import 'package:package_config/package_config.dart';
+import 'package:pub_semver/pub_semver.dart';
 
 import '../dependencies_hash_file/dependencies_hash_file.dart';
 import '../locking/locking.dart';
@@ -116,6 +117,10 @@ class NativeAssetsBuildRunner {
     );
     if (buildPlan == null) return null;
 
+    if (!await _ensureNativeAssetsCliProtocolVersion()) {
+      return null;
+    }
+
     var hookResult = HookResult();
     final globalMetadata = <String, Metadata>{};
     for (final package in buildPlan) {
@@ -806,6 +811,58 @@ ${compileResult.stdout}
         ? BuildOutput(hookOutputJson)
         : LinkOutput(hookOutputJson);
   }
+
+  Future<bool> _ensureNativeAssetsCliProtocolVersion() async {
+    final package = packageLayout.packageConfig['native_assets_cli'] ??
+        packageLayout.packageConfig['hook']; // Anticipate rename.
+    if (package == null) {
+      // No dependencies with a hook or using a different protocol helper
+      // package.
+      return true;
+    }
+    final packageRoot = package.root.normalizePath();
+    final hookVersion = await _nativeAssetsCliProtocolVersion(packageRoot);
+    if (hookVersion == null) {
+      logger.fine('Could not determine the protocol version of '
+          '${packageRoot.toFilePath()}.');
+      // This is most likely due to a newer version of the package.
+      return true;
+    }
+    if (latestParsableVersion > hookVersion) {
+      // The hook is too old.
+      logger.shout(
+        'The protocol version of ${packageRoot.toFilePath()} is '
+        '$hookVersion, which is no longer supported. Please update your '
+        'dependencies.',
+      );
+      return false;
+    }
+    return true;
+  }
+
+  Future<Version?> _nativeAssetsCliProtocolVersion(Uri packageRoot) async {
+    const files = [
+      'lib/src/config.dart',
+      'lib/src/model/hook_config.dart',
+    ];
+    for (final fileName in files) {
+      final file = _fileSystem.file(packageRoot.resolve(fileName));
+      if (!await file.exists()) {
+        continue;
+      }
+      final contents = await file.readAsString();
+      final regex = RegExp(r'latestVersion = Version\((\d+), (\d+), (\d+)\);');
+      final match = regex.firstMatch(contents);
+      if (match == null) {
+        continue;
+      }
+      final major = int.parse(match.group(1)!);
+      final minor = int.parse(match.group(2)!);
+      final patch = int.parse(match.group(3)!);
+      return Version(major, minor, patch);
+    }
+    return null;
+  }
 }
 
 /// Parses depfile contents.

pkgs/native_assets_builder/pubspec.yaml

@@ -20,6 +20,7 @@ dependencies:
   native_assets_cli:
     path: ../native_assets_cli/
   package_config: ^2.1.0
+  pub_semver: ^2.1.5
   yaml: ^3.1.2
   yaml_edit: ^2.1.0
 

pkgs/native_assets_builder/test/build_runner/version_skew_test.dart

@@ -36,4 +36,33 @@ void main() async {
       }
     });
   });
+
+  test('Test hook using a too old version of native_assets_cli',
+      timeout: longTimeout, () async {
+    await inTempDir((tempUri) async {
+      await copyTestProjects(targetUri: tempUri);
+      final packageUri = tempUri.resolve('native_add_version_skew_2/');
+
+      // First, run `pub get`, we need pub to resolve our dependencies.
+      await runPubGet(
+        workingDirectory: packageUri,
+        logger: logger,
+      );
+
+      final logMessages = <String>[];
+      final result = await buildCodeAssets(
+        packageUri,
+        capturedLogs: logMessages,
+      );
+      expect(result, isNull);
+      expect(
+          logMessages.join('\n'),
+          stringContainsInOrder([
+            'The protocol version of ',
+            'native_assets_cli',
+            ' is 1.3.0, which is no longer supported.',
+            'Please update your dependencies.'
+          ]));
+    });
+  });
 }

pkgs/native_assets_builder/test_data/manifest.yaml

@@ -69,6 +69,8 @@
 - native_add_version_skew/src/native_add.c
 - native_add_version_skew/src/native_add.h
 - native_add_version_skew/test/native_add_test.dart
+- native_add_version_skew_2/hook/build.dart
+- native_add_version_skew_2/pubspec.yaml
 - native_add/ffigen.yaml
 - native_add/hook/build.dart
 - native_add/lib/native_add.dart

pkgs/native_assets_builder/test_data/native_add_version_skew_2/hook/build.dart

@@ -0,0 +1,30 @@
+// Copyright (c) 2025, the Dart project authors.  Please see the AUTHORS file
+// for details. 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:logging/logging.dart';
+import 'package:native_assets_cli/native_assets_cli.dart';
+import 'package:native_toolchain_c/native_toolchain_c.dart';
+
+void main(List<String> arguments) async {
+  await build(arguments, (config, output) async {
+    final packageName = config.packageName;
+    final cbuilder = CBuilder.library(
+      name: packageName,
+      assetName: 'src/native_add_bindings_generated.dart',
+      sources: [
+        'src/native_add.c',
+      ],
+      dartBuildFiles: [],
+    );
+    await cbuilder.run(
+      config: config,
+      output: output,
+      logger: Logger('')
+        ..level = Level.ALL
+        ..onRecord.listen((record) {
+          print('${record.level.name}: ${record.time}: ${record.message}');
+        }),
+    );
+  });
+}

pkgs/native_assets_builder/test_data/native_add_version_skew_2/manifest.yaml

@@ -0,0 +1,2 @@
+- hook/build.dart
+- pubspec.yaml

pkgs/native_assets_builder/test_data/native_add_version_skew_2/pubspec.yaml

@@ -0,0 +1,20 @@
+name: native_add_version_skew_2
+description: This package should no longer work due to being too old.
+version: 0.1.0
+
+publish_to: none
+
+environment:
+  sdk: '>=3.3.0 <4.0.0'
+
+dependencies:
+  logging: ^1.1.1
+  native_assets_cli: ^0.6.0
+  native_toolchain_c: ^0.5.0
+
+dev_dependencies:
+  ffigen: ^8.0.2
+  lints: ^3.0.0
+  some_dev_dep:
+    path: ../some_dev_dep/
+  test: ^1.23.1

pkgs/native_assets_cli/lib/native_assets_cli_internal.dart

@@ -6,4 +6,5 @@
 library;
 
 export 'native_assets_cli_builder.dart';
+export 'src/config.dart' show latestParsableVersion;
 export 'src/model/hook.dart';