[native_assets] Disable experiment on stable and beta channel

We want to avoid users passing `--enable-experiment=native-assets` on
stable and beta, as we'd like to move fast and break things on the
experiment. This aligns the experiment with how the experiment is
working in Flutter: main and dev branch only.

Before this CL, dartdev did not check experiment flags. Unknown
experiments would fail in the VM. After this CL, dartdev checks the
experiment flags and errors out early.

Change-Id: I875ea3272f4b67342da19ea2e4be329a4b380573
Cq-Include-Trybots: luci.dart.try:pkg-linux-debug-try,pkg-linux-release-arm64-try,pkg-linux-release-try,pkg-mac-release-arm64-try,pkg-mac-release-try,pkg-win-release-arm64-try,pkg-win-release-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/406660
Commit-Queue: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>

pkg/analyzer/lib/src/dart/analysis/experiments.g.dart

@@ -187,6 +187,7 @@ class ExperimentalFeatures {
     documentation: 'Augmentations - enhancing declarations from outside',
     experimentalReleaseVersion: Version.parse('3.6.0'),
     releaseVersion: null,
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final class_modifiers = ExperimentalFeature(
@@ -197,6 +198,7 @@ class ExperimentalFeatures {
     documentation: 'Class modifiers',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('3.0.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final const_functions = ExperimentalFeature(
@@ -208,6 +210,7 @@ class ExperimentalFeatures {
         'Allow more of the Dart language to be executed in const expressions.',
     experimentalReleaseVersion: null,
     releaseVersion: null,
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final constant_update_2018 = ExperimentalFeature(
@@ -218,6 +221,7 @@ class ExperimentalFeatures {
     documentation: 'Enhanced constant expressions',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('2.0.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final constructor_tearoffs = ExperimentalFeature(
@@ -229,6 +233,7 @@ class ExperimentalFeatures {
         'Allow constructor tear-offs and explicit generic instantiations.',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('2.15.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final control_flow_collections = ExperimentalFeature(
@@ -239,6 +244,7 @@ class ExperimentalFeatures {
     documentation: 'Control Flow Collections',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('2.0.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final digit_separators = ExperimentalFeature(
@@ -249,6 +255,7 @@ class ExperimentalFeatures {
     documentation: 'Number literals with digit separators.',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('3.6.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final enhanced_enums = ExperimentalFeature(
@@ -259,6 +266,7 @@ class ExperimentalFeatures {
     documentation: 'Enhanced Enums',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('2.17.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final enhanced_parts = ExperimentalFeature(
@@ -269,6 +277,7 @@ class ExperimentalFeatures {
     documentation: 'Generalize parts to be nested and have exports/imports.',
     experimentalReleaseVersion: Version.parse('3.6.0'),
     releaseVersion: null,
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final enum_shorthands = ExperimentalFeature(
@@ -279,6 +288,7 @@ class ExperimentalFeatures {
     documentation: 'Shorter dot syntax for enum values.',
     experimentalReleaseVersion: null,
     releaseVersion: null,
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final extension_methods = ExperimentalFeature(
@@ -289,6 +299,7 @@ class ExperimentalFeatures {
     documentation: 'Extension Methods',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('2.6.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final generic_metadata = ExperimentalFeature(
@@ -300,6 +311,7 @@ class ExperimentalFeatures {
         'Allow annotations to accept type arguments; also allow generic function types as type arguments.',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('2.14.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final getter_setter_error = ExperimentalFeature(
@@ -311,6 +323,7 @@ class ExperimentalFeatures {
         'Stop reporting errors about mismatching types in a getter/setter pair.',
     experimentalReleaseVersion: null,
     releaseVersion: null,
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final inference_update_1 = ExperimentalFeature(
@@ -322,6 +335,7 @@ class ExperimentalFeatures {
         'Horizontal type inference for function expressions passed to generic invocations.',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('2.18.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final inference_update_2 = ExperimentalFeature(
@@ -332,6 +346,7 @@ class ExperimentalFeatures {
     documentation: 'Type promotion for fields',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('3.2.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final inference_update_3 = ExperimentalFeature(
@@ -343,6 +358,7 @@ class ExperimentalFeatures {
         'Better handling of conditional expressions, and switch expressions.',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('3.4.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final inference_update_4 = ExperimentalFeature(
@@ -353,6 +369,7 @@ class ExperimentalFeatures {
     documentation: 'A bundle of updates to type inference.',
     experimentalReleaseVersion: null,
     releaseVersion: null,
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final inference_using_bounds = ExperimentalFeature(
@@ -364,6 +381,7 @@ class ExperimentalFeatures {
         'Use type parameter bounds more extensively in type inference.',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('3.7.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final inline_class = ExperimentalFeature(
@@ -374,6 +392,7 @@ class ExperimentalFeatures {
     documentation: 'Extension Types',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('3.3.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final macros = ExperimentalFeature(
@@ -384,6 +403,7 @@ class ExperimentalFeatures {
     documentation: 'Static meta-programming',
     experimentalReleaseVersion: Version.parse('3.3.0'),
     releaseVersion: null,
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final named_arguments_anywhere = ExperimentalFeature(
@@ -394,6 +414,7 @@ class ExperimentalFeatures {
     documentation: 'Named Arguments Anywhere',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('2.17.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final native_assets = ExperimentalFeature(
@@ -404,6 +425,7 @@ class ExperimentalFeatures {
     documentation: 'Compile and bundle native assets.',
     experimentalReleaseVersion: null,
     releaseVersion: null,
+    channels: ["main", "dev"],
   );
 
   static final non_nullable = ExperimentalFeature(
@@ -414,6 +436,7 @@ class ExperimentalFeatures {
     documentation: 'Non Nullable by default',
     experimentalReleaseVersion: Version.parse('2.10.0'),
     releaseVersion: Version.parse('2.12.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final nonfunction_type_aliases = ExperimentalFeature(
@@ -424,6 +447,7 @@ class ExperimentalFeatures {
     documentation: 'Type aliases define a <type>, not just a <functionType>',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('2.13.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final null_aware_elements = ExperimentalFeature(
@@ -434,6 +458,7 @@ class ExperimentalFeatures {
     documentation: 'Null-aware elements and map entries in collections.',
     experimentalReleaseVersion: null,
     releaseVersion: null,
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final patterns = ExperimentalFeature(
@@ -444,6 +469,7 @@ class ExperimentalFeatures {
     documentation: 'Patterns',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('3.0.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final record_use = ExperimentalFeature(
@@ -454,6 +480,7 @@ class ExperimentalFeatures {
     documentation: 'Output arguments used by static functions.',
     experimentalReleaseVersion: null,
     releaseVersion: null,
+    channels: ["main", "dev"],
   );
 
   static final records = ExperimentalFeature(
@@ -464,6 +491,7 @@ class ExperimentalFeatures {
     documentation: 'Records',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('3.0.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final sealed_class = ExperimentalFeature(
@@ -474,6 +502,7 @@ class ExperimentalFeatures {
     documentation: 'Sealed class',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('3.0.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final set_literals = ExperimentalFeature(
@@ -484,6 +513,7 @@ class ExperimentalFeatures {
     documentation: 'Set Literals',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('2.0.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final spread_collections = ExperimentalFeature(
@@ -494,6 +524,7 @@ class ExperimentalFeatures {
     documentation: 'Spread Collections',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('2.0.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final super_parameters = ExperimentalFeature(
@@ -504,6 +535,7 @@ class ExperimentalFeatures {
     documentation: 'Super-Initializer Parameters',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('2.17.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final test_experiment = ExperimentalFeature(
@@ -515,6 +547,7 @@ class ExperimentalFeatures {
         'Has no effect. Can be used for testing the --enable-experiment command line functionality.',
     experimentalReleaseVersion: null,
     releaseVersion: null,
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final triple_shift = ExperimentalFeature(
@@ -525,6 +558,7 @@ class ExperimentalFeatures {
     documentation: 'Triple-shift operator',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('2.14.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final unnamed_libraries = ExperimentalFeature(
@@ -535,6 +569,7 @@ class ExperimentalFeatures {
     documentation: 'Unnamed libraries',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('2.19.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final unquoted_imports = ExperimentalFeature(
@@ -545,6 +580,7 @@ class ExperimentalFeatures {
     documentation: 'Shorter import syntax.',
     experimentalReleaseVersion: null,
     releaseVersion: null,
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final variance = ExperimentalFeature(
@@ -555,6 +591,7 @@ class ExperimentalFeatures {
     documentation: 'Sound variance',
     experimentalReleaseVersion: null,
     releaseVersion: null,
+    channels: ["stable", "beta", "dev", "main"],
   );
 
   static final wildcard_variables = ExperimentalFeature(
@@ -566,6 +603,7 @@ class ExperimentalFeatures {
         'Local declarations and parameters named `_` are non-binding.',
     experimentalReleaseVersion: null,
     releaseVersion: Version.parse('3.7.0'),
+    channels: ["stable", "beta", "dev", "main"],
   );
 }
 

pkg/analyzer/lib/src/dart/analysis/experiments_impl.dart

@@ -317,6 +317,12 @@ class ExperimentalFeature implements Feature {
   @override
   final Version? releaseVersion;
 
+  /// The channels on which this experiment is available.
+  ///
+  /// Valid channels are "stable", "beta", and "main". The "dev" channel in Dart
+  /// is implied by main.
+  final List<String> channels;
+
   ExperimentalFeature({
     required this.index,
     required this.enableString,
@@ -325,6 +331,7 @@ class ExperimentalFeature implements Feature {
     required this.documentation,
     required this.experimentalReleaseVersion,
     required this.releaseVersion,
+    this.channels = const [],
   }) : assert(isEnabledByDefault
             ? releaseVersion != null
             : releaseVersion == null);

pkg/analyzer/tool/experiments/generate.dart

@@ -155,6 +155,10 @@ class ExperimentalFeatures {
       var experimentalReleaseVersion =
           (features[key] as YamlMap)['experimentalReleaseVersion'];
       var enabledIn = (features[key] as YamlMap)['enabledIn'];
+      var channels =
+          (((features[key] as YamlMap)['channels']) as List?)?.cast<String>();
+      channels ??= ['stable', 'beta', 'dev', 'main'];
+      var channelsLiteral = '[${channels.map((e) => '"$e"').join(', ')}]';
       out.write('''
 
       static final $id = ExperimentalFeature(
@@ -180,6 +184,7 @@ class ExperimentalFeatures {
       } else {
         out.write("releaseVersion: null,");
       }
+      out.write("channels: $channelsLiteral,");
       out.writeln(');');
       ++index;
     }

pkg/dartdev/lib/dartdev.dart

@@ -223,6 +223,13 @@ class DartdevRunner extends CommandRunner<int> {
       log = Logger.verbose(ansi: ansi);
     }
 
+    late final List<String> experimentErrors =
+        validateExperiments(vmEnabledExperiments);
+    if (experimentErrors.isNotEmpty) {
+      experimentErrors.forEach(io.stderr.writeln);
+      return 254;
+    }
+
     var command = topLevelResults.command;
     final commandNames = [];
     while (command != null) {

pkg/dartdev/lib/src/experiments.dart

@@ -7,6 +7,7 @@ import 'dart:io';
 import 'package:analyzer/src/dart/analysis/experiments.dart';
 import 'package:args/args.dart';
 import 'package:collection/collection.dart' show IterableExtension;
+import 'package:dartdev/src/sdk.dart';
 
 const experimentFlagName = 'enable-experiment';
 
@@ -101,3 +102,28 @@ bool nativeAssetsEnabled(List<String> vmEnabledExperiments) =>
 
 bool recordUseEnabled(List<String> vmEnabledExperiments) =>
     vmEnabledExperiments.contains(ExperimentalFeatures.record_use.enableString);
+
+List<String> validateExperiments(List<String> vmEnabledExperiments) {
+  final errors = <String>[];
+  for (final enabledExperiment in vmEnabledExperiments) {
+    final experiment = experimentalFeatures.firstWhereOrNull(
+        (feature) => feature.enableString == enabledExperiment);
+    if (experiment == null) {
+      errors.add('Unknown experiment: $enabledExperiment');
+    } else if (!_availableOnCurrentChannel(experiment.channels)) {
+      final availableChannels = experiment.channels.join(', ');
+      final s = experiment.channels.length >= 2 ? 's' : '';
+      errors.add(
+        'Unavailable experiment: ${experiment.enableString} (this experiment '
+        'is only available on the $availableChannels channel$s, '
+        'this current channel is ${Runtime.runtime.channel})',
+      );
+    }
+  }
+  return errors;
+}
+
+bool _availableOnCurrentChannel(List<String> channels) {
+  final channel = Runtime.runtime.channel;
+  return channels.contains(channel);
+}