[dartdevc] Reduce the number of SDK libraries in the platform

We are temporarily building a smaller SDK platform to make progress building
applications against the forked sdk_nnbd sources. This is because some of the
libraries have not yet been ported and they don't compose well.

I needed to thread the status of the non-nullable experiment through the front
end entry point and into the target options, and native types.

Also includes some standardization of the flag name in DDC.

#39698

Change-Id: I4bdd503be694b28d7f95828d4af28d1d5fb3691f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127486
Commit-Queue: Nicholas Shahan <nshahan@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>

pkg/dev_compiler/lib/src/analyzer/code_generator.dart

@@ -905,7 +905,7 @@ class CodeGenerator extends Object
       // * There isn't an obvious place in dart:_runtime were we could place a
       //   method that adds these type tests (similar to addTypeTests()) because
       //   in the bootstrap ordering the Future class hasn't been defined yet.
-      if (options.nonNullableEnabled) {
+      if (options.enableNullSafety) {
         // TODO(nshahan) Update FutureOr type tests for NNBD.
         var typeParamT =
             getLegacyTypeParameterType(classElem.typeParameters[0]);

pkg/dev_compiler/lib/src/compiler/shared_command.dart

@@ -196,7 +196,7 @@ class SharedCompilerOptions {
   }
 
   // TODO(nshahan) Cleanup when NNBD graduates experimental status.
-  bool get nonNullableEnabled => experiments['non-nullable'] ?? false;
+  bool get enableNullSafety => experiments['non-nullable'] ?? false;
 }
 
 /// Finds explicit module names of the form `path=name` in [summaryPaths],

pkg/dev_compiler/lib/src/kernel/command.dart

@@ -266,8 +266,9 @@ Future<CompilerResult> _compile(List<String> args,
         sourcePathToUri(packageFile),
         sourcePathToUri(librarySpecPath),
         inputSummaries,
-        DevCompilerTarget(
-            TargetFlags(trackWidgetCreation: trackWidgetCreation)),
+        DevCompilerTarget(TargetFlags(
+            trackWidgetCreation: trackWidgetCreation,
+            enableNullSafety: options.enableNullSafety)),
         fileSystem: fileSystem,
         experiments: experiments,
         environmentDefines: declaredVariables);
@@ -302,8 +303,9 @@ Future<CompilerResult> _compile(List<String> args,
         sourcePathToUri(librarySpecPath),
         inputSummaries,
         inputDigests,
-        DevCompilerTarget(
-            TargetFlags(trackWidgetCreation: trackWidgetCreation)),
+        DevCompilerTarget(TargetFlags(
+            trackWidgetCreation: trackWidgetCreation,
+            enableNullSafety: options.enableNullSafety)),
         fileSystem: fileSystem,
         experiments: experiments,
         environmentDefines: declaredVariables,

pkg/dev_compiler/lib/src/kernel/compiler.dart

@@ -222,7 +222,8 @@ class ProgramCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
     coreTypes ??= CoreTypes(component);
     var types = TypeEnvironment(coreTypes, hierarchy);
     var constants = DevCompilerConstants();
-    var nativeTypes = NativeTypeSet(coreTypes, constants);
+    var nativeTypes = NativeTypeSet(coreTypes, constants,
+        enableNullSafety: options.enableNullSafety);
     var jsTypeRep = JSTypeRep(types, hierarchy);
     var staticTypeContext = StatefulStaticTypeContext.stacked(types);
     return ProgramCompiler._(
@@ -1003,7 +1004,7 @@ class ProgramCompiler extends ComputeOnceConstantVisitor<js_ast.Expression>
       // * There isn't an obvious place in dart:_runtime were we could place a
       //   method that adds these type tests (similar to addTypeTests()) because
       //   in the bootstrap ordering the Future class hasn't been defined yet.
-      if (_options.nonNullableEnabled) {
+      if (_options.enableNullSafety) {
         // TODO(nshahan) Update FutureOr type tests for NNBD
         var typeParam =
             TypeParameterType(c.typeParameters[0], Nullability.legacy);

pkg/dev_compiler/lib/src/kernel/native_types.dart

@@ -37,7 +37,8 @@ class NativeTypeSet {
   final _nativeTypes = HashSet<Class>.identity();
   final _pendingLibraries = HashSet<Library>.identity();
 
-  NativeTypeSet(this.coreTypes, this.constants) {
+  NativeTypeSet(this.coreTypes, this.constants,
+      {bool enableNullSafety = false}) {
     // First, core types:
     // TODO(vsm): If we're analyzing against the main SDK, those
     // types are not explicitly annotated.
@@ -61,12 +62,16 @@ class NativeTypeSet {
     // listed below).
 
     // Second, html types - these are only searched if we use dart:html, etc.:
-    _addPendingExtensionTypes(sdk.getLibrary('dart:html'));
-    _addPendingExtensionTypes(sdk.getLibrary('dart:indexed_db'));
-    _addPendingExtensionTypes(sdk.getLibrary('dart:svg'));
-    _addPendingExtensionTypes(sdk.getLibrary('dart:web_audio'));
-    _addPendingExtensionTypes(sdk.getLibrary('dart:web_gl'));
-    _addPendingExtensionTypes(sdk.getLibrary('dart:web_sql'));
+    // TODO(39698) Remove this check and the named parameter once we don't have
+    // to exclude libraries from the forked NNBD sdk.
+    if (!enableNullSafety) {
+      _addPendingExtensionTypes(sdk.getLibrary('dart:html'));
+      _addPendingExtensionTypes(sdk.getLibrary('dart:indexed_db'));
+      _addPendingExtensionTypes(sdk.getLibrary('dart:svg'));
+      _addPendingExtensionTypes(sdk.getLibrary('dart:web_audio'));
+      _addPendingExtensionTypes(sdk.getLibrary('dart:web_gl'));
+      _addPendingExtensionTypes(sdk.getLibrary('dart:web_sql'));
+    }
   }
 
   void _addExtensionType(Class c, [bool mustBeNative = false]) {

pkg/dev_compiler/lib/src/kernel/target.dart

@@ -14,7 +14,62 @@ import 'kernel_helpers.dart';
 
 /// A kernel [Target] to configure the Dart Front End for dartdevc.
 class DevCompilerTarget extends Target {
-  DevCompilerTarget(this.flags);
+  // TODO(39698) Turn these back into const lists returned from the getters
+  // once we don't have to exclude libraries from the forked NNBD sdk.
+  List<String> _extraRequiredLibraries;
+  List<String> _extraIndexedLibraries;
+
+  DevCompilerTarget(this.flags)
+      : _extraRequiredLibraries = [
+          'dart:_runtime',
+          'dart:_debugger',
+          'dart:_foreign_helper',
+          'dart:_interceptors',
+          'dart:_internal',
+          'dart:_isolate_helper',
+          'dart:_js_helper',
+          'dart:_js_mirrors',
+          'dart:_js_primitives',
+          'dart:_metadata',
+          'dart:_native_typed_data',
+          'dart:async',
+          'dart:collection',
+          'dart:convert',
+          if (!flags.enableNullSafety) ...[
+            'dart:developer',
+            'dart:io',
+            'dart:isolate'
+          ],
+          'dart:js',
+          'dart:js_util',
+          'dart:math',
+          'dart:mirrors',
+          'dart:typed_data',
+          if (!flags.enableNullSafety) ...[
+            'dart:indexed_db',
+            'dart:html',
+            'dart:html_common',
+            'dart:svg',
+            'dart:web_audio',
+            'dart:web_gl',
+            'dart:web_sql'
+          ]
+        ],
+        _extraIndexedLibraries = [
+          'dart:async',
+          'dart:collection',
+          if (!flags.enableNullSafety) ...['dart:html', 'dart:indexed_db'],
+          'dart:math',
+          if (!flags.enableNullSafety) ...[
+            'dart:svg',
+            'dart:web_audio',
+            'dart:web_gl',
+            'dart:web_sql'
+          ],
+          'dart:_interceptors',
+          'dart:_js_helper',
+          'dart:_native_typed_data',
+        ];
 
   final TargetFlags flags;
 
@@ -30,54 +85,11 @@ class DevCompilerTarget extends Target {
   String get name => 'dartdevc';
 
   @override
-  List<String> get extraRequiredLibraries => const [
-        'dart:_runtime',
-        'dart:_debugger',
-        'dart:_foreign_helper',
-        'dart:_interceptors',
-        'dart:_internal',
-        'dart:_isolate_helper',
-        'dart:_js_helper',
-        'dart:_js_mirrors',
-        'dart:_js_primitives',
-        'dart:_metadata',
-        'dart:_native_typed_data',
-        'dart:async',
-        'dart:collection',
-        'dart:convert',
-        'dart:developer',
-        'dart:io',
-        'dart:isolate',
-        'dart:js',
-        'dart:js_util',
-        'dart:math',
-        'dart:mirrors',
-        'dart:typed_data',
-        'dart:indexed_db',
-        'dart:html',
-        'dart:html_common',
-        'dart:svg',
-        'dart:web_audio',
-        'dart:web_gl',
-        'dart:web_sql'
-      ];
+  List<String> get extraRequiredLibraries => _extraRequiredLibraries;
 
   // The libraries required to be indexed via CoreTypes.
   @override
-  List<String> get extraIndexedLibraries => const [
-        'dart:async',
-        'dart:collection',
-        'dart:html',
-        'dart:indexed_db',
-        'dart:math',
-        'dart:svg',
-        'dart:web_audio',
-        'dart:web_gl',
-        'dart:web_sql',
-        'dart:_interceptors',
-        'dart:_js_helper',
-        'dart:_native_typed_data',
-      ];
+  List<String> get extraIndexedLibraries => _extraIndexedLibraries;
 
   @override
   bool mayDefineRestrictedType(Uri uri) =>

pkg/front_end/tool/_fasta/command_line.dart

@@ -305,8 +305,16 @@ ProcessedOptions analyzeCommandLine(
 
   final String targetName = options["--target"] ?? "vm";
 
+  Map<ExperimentalFlag, bool> experimentalFlags = parseExperimentalFlags(
+      parseExperimentalArguments(options["--enable-experiment"]),
+      onError: throwCommandLineProblem,
+      onWarning: print);
+
   final TargetFlags flags = new TargetFlags(
-      forceLateLoweringForTesting: options["--force-late-lowering"]);
+      forceLateLoweringForTesting: options["--force-late-lowering"],
+      enableNullSafety:
+          experimentalFlags.containsKey(ExperimentalFlag.nonNullable) &&
+              experimentalFlags[ExperimentalFlag.nonNullable]);
 
   final Target target = getTarget(targetName, flags);
   if (target == null) {
@@ -356,11 +364,6 @@ ProcessedOptions analyzeCommandLine(
     });
   }
 
-  Map<ExperimentalFlag, bool> experimentalFlags = parseExperimentalFlags(
-      parseExperimentalArguments(options["--enable-experiment"]),
-      onError: throwCommandLineProblem,
-      onWarning: print);
-
   if (programName == "compile_platform") {
     if (arguments.length != 5) {
       return throw new CommandLineProblem.deprecated(

pkg/kernel/lib/target/targets.dart

@@ -12,10 +12,12 @@ final List<String> targetNames = targets.keys.toList();
 class TargetFlags {
   final bool trackWidgetCreation;
   final bool forceLateLoweringForTesting;
+  final bool enableNullSafety;
 
   TargetFlags(
       {this.trackWidgetCreation = false,
-      this.forceLateLoweringForTesting = false});
+      this.forceLateLoweringForTesting = false,
+      this.enableNullSafety = false});
 }
 
 typedef Target _TargetBuilder(TargetFlags flags);

utils/dartdevc/BUILD.gn

@@ -210,15 +210,25 @@ create_timestamp_file("dartdevc_sdk_patch_stamp") {
 group("dartdevc_test_kernel_pkg") {
   deps = [
     ":async_helper_js",
-    ":collection_js",
     ":expect_js",
     ":js_js",
-    ":matcher_js",
     ":meta_js",
-    ":path_js",
-    ":stack_trace_js",
-    ":unittest_js",
   ]
+
+  # TODO(38701): Cleanup after merging the forked SDK into mainline.
+  if (!use_nnbd) {
+    # TODO(sigmund): Merge this list into above. We turned this off temporarily
+    # while the migration of libraries is in flux, this step otherwise fails
+    # with many nnbd-related compile-time errors because the packages are
+    # assumed to be nnbd compilant.
+    deps += [
+      ":collection_js",
+      ":matcher_js",
+      ":path_js",
+      ":stack_trace_js",
+      ":unittest_js",
+    ]
+  }
 }
 
 template("dartdevc_kernel_compile") {
@@ -232,10 +242,6 @@ template("dartdevc_kernel_compile") {
   #   * package_dependencies: the name of other packages this package depends
   #     on. When providing `name`, a separate `dartdevc_kernel_compile` target
   #     named `${name}_js` must exist.
-  #   * nnbd_disabled: whether to disable the non-nullable experiment under the
-  #     NNBD build. This is used temporariy until we either migrate the packages
-  #     or add support to read the language version information from the package
-  #     itself.
   #   * args: additional args to pass to dartdevc
 
   prebuilt_dart_action(target_name) {
@@ -288,15 +294,9 @@ template("dartdevc_kernel_compile") {
       args += invoker.args
     }
 
-    # TODO(sigmund): remove nnbd_disabled. We turned this off temporarily while
-    # the migration of libraries is in flux, this step otherwise fails with many
-    # nnbd-related compile-time errors because the packages are assumed to be
-    # nnbd compilant.
-    if (!defined(invoker.nnbd_disabled) || !invoker.nnbd_disabled) {
-      # TODO(38701): Cleanup after merging the forked SDK into mainline.
-      if (use_nnbd) {
-        args += [ "--enable-experiment=non-nullable" ]
-      }
+    # TODO(38701): Cleanup after merging the forked SDK into mainline.
+    if (use_nnbd) {
+      args += [ "--enable-experiment=non-nullable" ]
     }
   }
 }
@@ -307,7 +307,6 @@ dartdevc_kernel_compile("async_helper_js") {
 
 dartdevc_kernel_compile("collection_js") {
   package = "collection"
-  nnbd_disabled = true
 }
 
 dartdevc_kernel_compile("expect_js") {
@@ -323,7 +322,6 @@ dartdevc_kernel_compile("js_js") {
 dartdevc_kernel_compile("matcher_js") {
   package = "matcher"
   package_dependencies = [ "stack_trace" ]
-  nnbd_disabled = true
 }
 
 dartdevc_kernel_compile("meta_js") {
@@ -332,13 +330,11 @@ dartdevc_kernel_compile("meta_js") {
 
 dartdevc_kernel_compile("path_js") {
   package = "path"
-  nnbd_disabled = true
 }
 
 dartdevc_kernel_compile("stack_trace_js") {
   package = "stack_trace"
   package_dependencies = [ "path" ]
-  nnbd_disabled = true
 }
 
 # TODO(rnystrom): Remove this when unittest is no longer used. Also remove
@@ -354,7 +350,6 @@ dartdevc_kernel_compile("unittest_js") {
     "html_individual_config",
     "html_enhanced_config",
   ]
-  nnbd_disabled = true
 }
 
 compile_platform("dartdevc_platform") {