Deprecate top level pub.

Also makes the `pub` shell script (and its .bat counterpart)
forward to a `dart __deprecated_pub` command that implements the
old top-level.

This allows us to get rid of pub.dart.snapshot saving ~15 MB in a
unzipped sdk.

The reason for not forwarding directly to `dart pub` is that the
interface is slightly different (for example there is no `dart pub --version`).


The only new commit in pub is: `3c2ce330 Expose toplevel as a command`


Bug: dart-lang/pub#2736
Change-Id: I6eb08d120c4844b3a12bc29544df6a868cd6fcc8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/210582
Commit-Queue: Sigurd Meldgaard <sigurdm@google.com>
Reviewed-by: Jonas Jensen <jonasfj@google.com>

Author: sigurdm

DEPS

@@ -140,7 +140,7 @@ vars = {
   "pool_rev": "7abe634002a1ba8a0928eded086062f1307ccfae",
   "process_rev": "56ece43b53b64c63ae51ec184b76bd5360c28d0b",
   "protobuf_rev": "c1eb6cb51af39ccbaa1a8e19349546586a5c8e31",
-  "pub_rev": "9f2ddc02f066c68fb638ff65fbb73761ece23267",
+  "pub_rev": "cd7a43f2109f7e5eb22e73c7f4e15d25fd57598e",
   "pub_semver_rev": "f50d80ef10c4b2fa5f4c8878036a4d9342c0cc82",
   "resource_rev": "6b79867d0becf5395e5819a75720963b8298e9a7",
   "root_certificates_rev": "692f6d6488af68e0121317a9c2c9eb393eb0ee50",

pkg/dartdev/lib/dartdev.dart

@@ -15,6 +15,7 @@ import 'package:devtools_server/devtools_server.dart';
 import 'package:meta/meta.dart';
 import 'package:pedantic/pedantic.dart';
 import 'package:pub/pub.dart';
+
 import 'package:usage/usage.dart';
 
 import 'src/analytics.dart';
@@ -36,6 +37,15 @@ import 'src/vm_interop_handler.dart';
 /// analytics logic, it has been moved here.
 Future<void> runDartdev(List<String> args, SendPort port) async {
   VmInteropHandler.initialize(port);
+
+  // TODO(sigurdm): Remove when top-level pub is removed.
+  if (args[0] == '__deprecated_pub') {
+    // This is the entry-point supporting the top-level `pub` script.
+    // ignore: deprecated_member_use
+    VmInteropHandler.exit(await deprecatedpubCommand().run(args.skip(1)));
+    return;
+  }
+
   if (args.contains('run')) {
     // These flags have a format that can't be handled by package:args, so while
     // they are valid flags we'll assume the VM has verified them by this point.

pkg/dartdev/lib/src/commands/create.dart

@@ -102,14 +102,11 @@ class CreateCommand extends DartdevCommand {
     );
 
     if (argResults['pub']) {
-      if (!Sdk.checkArtifactExists(sdk.pubSnapshot)) {
-        return 255;
-      }
       log.stdout('');
       var progress = log.progress('Running pub get');
       var process = await startDartProcess(
         sdk,
-        [sdk.pubSnapshot, 'get', '--no-precompile'],
+        ['pub', 'get'],
         cwd: dir,
       );
 

pkg/dartdev/lib/src/sdk.dart

@@ -78,13 +78,6 @@ class Sdk {
         'devtools',
       );
 
-  String get pubSnapshot => path.absolute(
-        sdkPath,
-        'bin',
-        'snapshots',
-        'pub.dart.snapshot',
-      );
-
   static bool checkArtifactExists(String path) {
     if (!File(path).existsSync()) {
       log.stderr('Could not find $path. Have you built the full '

pkg/dartdev/test/analytics_test.dart

@@ -99,7 +99,8 @@ Future<void> main() async {
     });
     test('create', () {
       final p = project(logAnalytics: true);
-      final result = p.runSync(['create', '-tpackage-simple', 'name']);
+      final result =
+          p.runSync(['create', '--no-pub', '-tpackage-simple', 'name']);
       expect(extractAnalytics(result), [
         {
           'hitType': 'screenView',
@@ -113,7 +114,7 @@ Future<void> main() async {
             'label': null,
             'value': null,
             'cd1': '0',
-            'cd3': ' template ',
+            'cd3': ' pub template ',
           }
         },
         {

pkg/dartdev/test/sdk_test.dart

@@ -25,10 +25,6 @@ void _sdk() {
     expectFileExists(Sdk().analysisServerSnapshot);
   });
 
-  test('pub snapshot', () {
-    expectFileExists(Sdk().pubSnapshot);
-  });
-
   test('dds snapshot', () {
     expectFileExists(Sdk().ddsSnapshot);
   });

sdk/BUILD.gn

@@ -56,7 +56,6 @@ declare_args() {
 # ........gen_kernel.dart.snapshot (if not on ia32)
 # ........kernel-service.dart.snapshot
 # ........kernel_worker.dart.snapshot
-# ........pub.dart.snapshot
 # ......resources/
 # ........dartdoc/
 # ...........packages
@@ -140,10 +139,6 @@ _platform_sdk_snapshots = [
     "frontend_server",
     "../utils/kernel-service:frontend_server",
   ],
-  [
-    "pub",
-    "../utils/pub",
-  ],
 ]
 if (create_kernel_service_snapshot) {
   _platform_sdk_snapshots += [ [

sdk/bin/pub

@@ -28,7 +28,7 @@ PROG_NAME="$(follow_links "$BASH_SOURCE")"
 
 # Handle the case where dart-sdk/bin has been symlinked to.
 BIN_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
-
+DART="$BIN_DIR/dart"
 
 unset VM_OPTIONS
 declare -a VM_OPTIONS
@@ -39,12 +39,9 @@ if [[ $DART_VM_OPTIONS ]]; then
   VM_OPTIONS+=("${OPTIONS[@]}")
 fi
 
-# Run the pub snapshot.
-DART="$BIN_DIR/dart"
-if array_contains "--no-preview-dart-2" "${VM_OPTIONS[@]}"; then
-  echo "Pub no longer supports Dart 1"
-  exit -1
-else
-  SNAPSHOT="$BIN_DIR/snapshots/pub.dart.snapshot"
-  exec "$DART" "${VM_OPTIONS[@]}" "$SNAPSHOT" "$@"
+if [ -t 2 ]; then # Only print warning when run in terminal.
+  >&2 echo 'The top level `pub` command is deprecated. Use `dart pub` instead.'
 fi
+
+# Forward to the `dart __deprecatedpub` command.
+exec "$DART" "${VM_OPTIONS[@]}" __deprecated_pub "$@"

sdk/bin/pub_sdk

@@ -28,11 +28,8 @@ if not "_%DART_VM_OPTIONS%_" == "__" (
   )
 )
 
-if defined USING_DART_1 (
-  echo "Pub no longer supports Dart 1"
-) else (
-  "%BIN_DIR%\dart" %VM_OPTIONS% "%BIN_DIR%\snapshots\pub.dart.snapshot" %*
-)
+echo "The top level `pub.bat` command is deprecated. Use `dart pub` instead." 1>&2
+"%BIN_DIR%\dart" %VM_OPTIONS% __deprecated_pub %*
 
 endlocal