[ddc] Cleanup JavaScript files in packaged SDK

- Removes all versions of `dart_sdk.js` and `dart_sdk.js.map` from the
  packaged SDK. All supported build systems compile their own versions
  of these files.
- Removes `dart-sdk/lib/dev_compiler/kernel/common/run.js`.
  No supported build system uses the "common" module system.
- Moves `dart-sdk/lib/dev_compiler/kernel/amd/require.js` to
  `dart-sdk/lib/dev_compiler/amd/require.js` cleaning up the
  unnecessary `kernel/` sub-directory.

Issue: https://github.com/dart-lang/sdk/issues/50700

Change-Id: Id4173ddec31a6c0260009924bf1e1ae3d3f32abf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/275482
Reviewed-by: Mark Zhou <markzipan@google.com>
Commit-Queue: Nicholas Shahan <nshahan@google.com>

pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_suite.dart

@@ -380,8 +380,8 @@ class TestDriver {
         if (!File('$dartSdkPath.js').existsSync()) {
           throw Exception('Unable to find Dart SDK at $dartSdkPath.js');
         }
-        var requirePath = escaped(p.join(buildDir, 'dart-sdk', 'lib',
-            'dev_compiler', 'kernel', 'amd', 'require.js'));
+        var requirePath = escaped(p.join(
+            buildDir, 'dart-sdk', 'lib', 'dev_compiler', 'amd', 'require.js'));
         var outputPath = escaped(p.withoutExtension(output.toFilePath()));
         bootstrapFile.writeAsStringSync('''
 <script src='$requirePath'></script>

pkg/dev_compiler/test/sdk_source_map_test.dart

@@ -5,17 +5,17 @@
 import 'dart:io';
 
 import 'package:expect/expect.dart';
+import 'package:front_end/src/compute_platform_binaries_location.dart';
 import 'package:path/path.dart' as p;
 import 'package:source_maps/source_maps.dart' as sm;
 
 void main() async {
-  final binDir = p.dirname(Platform.resolvedExecutable);
-  final sdkDir = p.dirname(binDir);
-  // This test expects to run in a build SDK.
-  Expect.isTrue(binDir.endsWith('bin'));
-
-  final sdkJsMapDir =
-      p.joinAll([sdkDir, 'lib', 'dev_compiler', 'kernel', 'amd']);
+  // This test relies on source maps for the built SDK when working inside the
+  // Dart SDK repo.
+  final buildDir = computePlatformBinariesLocation(forceBuildDir: true);
+  final sdkJsMapDir = buildDir
+      .resolve(p.joinAll(['gen', 'utils', 'dartdevc', 'sound', 'amd']))
+      .toFilePath();
   final sdkJsMapFile = p.join(sdkJsMapDir, 'dart_sdk.js.map');
 
   final sdkJsMapText = await File(sdkJsMapFile).readAsString();

sdk/BUILD.gn

@@ -530,67 +530,21 @@ copy("copy_dev_compiler_dills") {
       [ "$root_out_dir/$dart_sdk_output/lib/_internal/{{source_file_part}}" ]
 }
 
-# This rule copies DDK's JS SDK and require.js to lib/dev_compiler/kernel/amd.
-copy("copy_dev_compiler_js_amd_kernel") {
-  visibility = [ ":copy_dev_compiler_js" ]
-  deps = [ "../utils/dartdevc:dartdevc_kernel_sdk" ]
-  gen_dir =
-      get_label_info("../utils/dartdevc:dartdevc_kernel_sdk", "target_gen_dir")
-  sources = [
-    "$gen_dir/kernel/amd/dart_sdk.js",
-    "$gen_dir/kernel/amd/dart_sdk.js.map",
-    "../third_party/requirejs/require.js",
-  ]
-  outputs = [ "$root_out_dir/$dart_sdk_output/lib/dev_compiler/kernel/amd/{{source_file_part}}" ]
-}
-
-# This rule copies DDK's JS SDK to lib/dev_compiler/kernel/common.
-copy("copy_dev_compiler_js_common_kernel") {
-  visibility = [ ":copy_dev_compiler_js" ]
-  deps = [ "../utils/dartdevc:dartdevc_kernel_sdk" ]
-  gen_dir =
-      get_label_info("../utils/dartdevc:dartdevc_kernel_sdk", "target_gen_dir")
-  sources = [
-    "$gen_dir/kernel/common/dart_sdk.js",
-    "$gen_dir/kernel/common/dart_sdk.js.map",
-    "../pkg/dev_compiler/lib/js/common/run.js",
-  ]
-  outputs = [ "$root_out_dir/$dart_sdk_output/lib/dev_compiler/kernel/common/{{source_file_part}}" ]
-}
-
-# This rule copies DDK's JS SDK to lib/dev_compiler/kernel/es6.
-copy("copy_dev_compiler_js_es6_kernel") {
-  visibility = [ ":copy_dev_compiler_js" ]
-  deps = [ "../utils/dartdevc:dartdevc_kernel_sdk" ]
-  gen_dir =
-      get_label_info("../utils/dartdevc:dartdevc_kernel_sdk", "target_gen_dir")
-  sources = [
-    "$gen_dir/kernel/es6/dart_sdk.js",
-    "$gen_dir/kernel/es6/dart_sdk.js.map",
-  ]
-  outputs = [ "$root_out_dir/$dart_sdk_output/lib/dev_compiler/kernel/es6/{{source_file_part}}" ]
-}
-
-# Copies all of the JS artifacts needed by DDC.
-group("copy_dev_compiler_js") {
-  visibility = [
-    ":copy_dev_compiler_sdk",
-    ":copy_dev_compiler_tools",
-  ]
-  public_deps = [
-    ":copy_dev_compiler_js_amd_kernel",
-    ":copy_dev_compiler_js_common_kernel",
-    ":copy_dev_compiler_js_es6_kernel",
-  ]
-}
-
-# This rule copies tools to go along with ddc.
-copy("copy_dev_compiler_tools") {
+# Copies require.js to lib/dev_compiler/amd.
+# Used to load DDC compiled amd modules.
+copy("copy_dev_compiler_amd_require_js") {
   visibility = [ ":copy_dev_compiler_sdk" ]
-  deps = [
-    ":copy_dev_compiler_js",
-    "../utils/dartdevc:stack_trace_mapper",
+  sources = [ "../third_party/requirejs/require.js" ]
+  outputs = [
+    "$root_out_dir/$dart_sdk_output/lib/dev_compiler/amd/{{source_file_part}}",
   ]
+}
+
+# Copies stack_trace_mapper tool to lib/dev_compiler/web.
+# Used when running DDC compiled applicaations.
+copy("copy_dev_compiler_stack_trace_mapper") {
+  visibility = [ ":copy_dev_compiler_sdk" ]
+  deps = [ "../utils/dartdevc:stack_trace_mapper" ]
   dart_out =
       get_label_info("../utils/dartdevc:stack_trace_mapper", "root_out_dir")
   sources = [ "$dart_out/dev_compiler/build/web/dart_stack_trace_mapper.js" ]
@@ -599,13 +553,13 @@ copy("copy_dev_compiler_tools") {
   ]
 }
 
-# This is the main rule for copying ddc's dependencies to lib/
+# Main rule for copying all of DDC's dependencies to lib.
 group("copy_dev_compiler_sdk") {
   visibility = [ ":create_full_sdk" ]
   public_deps = [
+    ":copy_dev_compiler_amd_require_js",
     ":copy_dev_compiler_dills",
-    ":copy_dev_compiler_js",
-    ":copy_dev_compiler_tools",
+    ":copy_dev_compiler_stack_trace_mapper",
   ]
 }
 

utils/dartdevc/BUILD.gn

@@ -347,7 +347,14 @@ template("dartdevc_sdk_js") {
       "--multi-root-scheme",
       "org-dartlang-sdk",
       "--multi-root-output-path",
-      rebase_path("$target_gen_dir/../../"),
+
+      # This path is intended to point to a version of source files used to
+      # generate the SDK JavaScript modules.
+      # The intention is that the source map locations can be linked to the
+      # orignal source files while running SDK test suites.
+      # These JavaScript files and source maps are no longer packaged into the
+      # released SDK.
+      rebase_path("$target_gen_dir/../../../dart-sdk"),
       "--modules",
       "amd",
       "-o",