Bump pub

New commits:

git log --format="%C(auto) %h %s" 900e796a37fd9f68de9dd183cf4798fe5f055eaa..4ca4767a6c00b2dadecdaee9a4866dae40ef25f2
 4ca4767a Added a dart pub outdated --transitive option (#2731)
 6b145bd6 Deprecate --server argument to `pub publish` and `pub uploader`. (#2697)
 7737023a don't warn if previous prerelease was null safe (#2730)
 62f92838 Improve outdated --mode=null-safety (#2724)
 cc589ec3 Change message for no Latest resolution (#2729)
 656803e9 Require sdk constraint (#2718)
 8309d877 Added test that dev_dependency does not trigger null-safety warnings when publishing (#2727)
 332ea049 Remove warning about mixed mode. (#2723)
 a98a1f23 Simplify null-safety analysis in `pub outdated --mode=null-safety` (#2721)
 5fba2015 Outdated null safety implies prereleases (#2722)
 fb9ec4af Fixed bug in yaml_edit (#2703)

Change-Id: I22a084aee06542e04a272269fb0134f0ac62f779
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/170690
Commit-Queue: Sigurd Meldgaard <sigurdm@google.com>
Reviewed-by: Michael Thomsen <mit@google.com>
Reviewed-by: Jonas Jensen <jonasfj@google.com>

CHANGELOG.md

@@ -85,15 +85,31 @@ Updated the Linter to `0.1.123`, which includes:
 
 #### Pub
 
+* **Breaking**: The Dart SDK constraint is now **required** in `pubspec.yaml`.
+
+  You now have to include a section like:
+
+  ```yaml
+  environment:
+    sdk: '>=2.10.0 <3.0.0'
+  ```
+
+  See [#44072][].
 * The top level `pub` executable has been deprecated. Use `dart pub` instead.
-* New commands `dart pub add` and `dart pub remove` that adds and removes new
-  dependencies to your `pubspec.yaml`.
-* New option `dart pub outdated mode=null-safety` that will analyze your
+  See [dart tool][].
+* New command `dart pub add` that adds  new dependencies to your `pubspec.yaml`.
+  
+  And a corresponding `dart pub remove` that removes dependencies.
+* New option `dart pub outdated --mode=null-safety` that will analyze your
   dependencies for null-safety.
 * `dart pub publish` will now check your pubspec keys for likely typos.
-* `dart pub get` will print a warning if the resolution is in mixed-mode requiring
-  the code to run with `dart --no-sound-null-safety`.
 * New command `dart pub login` that logs in to pub.dev.
+* The `--server` option to `dart pub publish` and `dart pub uploader` have been
+  deprecated. Use `publish_to` in your `pubspec.yaml` or set the 
+  `$PUB_HOSTED_URL` environment variable.
+
+[#44072]: https://github.com/dart-lang/sdk/issues/44072
+[dart tool]: https://dart.dev/tools/dart-tool
 
 ## 2.10.3 - 2020-10-29
 

DEPS

@@ -132,7 +132,7 @@ vars = {
   "ply_rev": "604b32590ffad5cbb82e4afef1d305512d06ae93",
   "pool_rev": "eedbd5fde84f9a1a8da643b475305a81841da599",
   "protobuf_rev": "3746c8fd3f2b0147623a8e3db89c3ff4330de760",
-  "pub_rev": "900e796a37fd9f68de9dd183cf4798fe5f055eaa",
+  "pub_rev": "4ca4767a6c00b2dadecdaee9a4866dae40ef25f2",
   "pub_semver_tag": "v1.4.4",
   "resource_rev": "6b79867d0becf5395e5819a75720963b8298e9a7",
   "root_certificates_rev": "7e5ec82c99677a2e5b95ce296c4d68b0d3378ed8",

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

@@ -0,0 +1,89 @@
+// Copyright (c) 2020, 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 'dart:async';
+
+import 'package:args/args.dart';
+
+import '../core.dart';
+import '../experiments.dart';
+import '../sdk.dart';
+import '../vm_interop_handler.dart';
+
+class PubCommand extends DartdevCommand {
+  static const String cmdName = 'pub';
+
+  PubCommand() : super(cmdName, 'Work with packages.');
+
+  // TODO(jwren) as soon as pub commands are are implemented directly in
+  //  dartdev, remove this static list.
+  /// A list of all subcommands, used only for the implementation of
+  /// [usagePath], see below.
+  static List<String> pubSubcommands = [
+    'cache',
+    'deps',
+    'downgrade',
+    'get',
+    'global',
+    'logout',
+    'outdated',
+    'publish',
+    'run',
+    'upgrade',
+    'uploader',
+    'version',
+  ];
+
+  @override
+  ArgParser createArgParser() => ArgParser.allowAnything();
+
+  @override
+  void printUsage() {
+    // Override [printUsage] for invocations of 'dart help pub' which won't
+    // execute [run] below.  Without this, the 'dart help pub' reports the
+    // command pub with no commands or flags.
+    if (!Sdk.checkArtifactExists(sdk.pubSnapshot)) {
+      return;
+    }
+    final command = sdk.pubSnapshot;
+    final args = ['help'];
+
+    log.trace('$command ${args.first}');
+
+    // Call 'pub help'
+    VmInteropHandler.run(command, args);
+  }
+
+  @override
+  FutureOr<int> run() async {
+    if (!Sdk.checkArtifactExists(sdk.pubSnapshot)) {
+      return 255;
+    }
+    final command = sdk.pubSnapshot;
+    var args = argResults.arguments;
+
+    // Pass any --enable-experiment options along.
+    if (args.isNotEmpty && wereExperimentsSpecified) {
+      List<String> experimentIds = specifiedExperiments;
+
+      if (args.first == 'run') {
+        args = [
+          ...args.sublist(0, 1),
+          '--$experimentFlagName=${experimentIds.join(',')}',
+          ...args.sublist(1),
+        ];
+      } else if (args.length > 1 && args[0] == 'global' && args[0] == 'run') {
+        args = [
+          ...args.sublist(0, 2),
+          '--$experimentFlagName=${experimentIds.join(',')}',
+          ...args.sublist(2),
+        ];
+      }
+    }
+
+    log.trace('$command ${args.join(' ')}');
+    VmInteropHandler.run(command, args);
+    return 0;
+  }
+}

pkg/dartdev/test/commands/pub_test.dart

@@ -86,8 +86,9 @@ void pub() {
     expect(result.stdout, isEmpty);
     expect(
         result.stderr,
-        contains('bin/main.dart:1:18: Error: This requires the \'non-nullable\''
-            ' language feature to be enabled.\n'));
+        contains('bin/main.dart:1:18: Error: This requires the null safety '
+            'language feature, which requires language version of 2.12 or '
+            'higher.\n'));
   });
 
   test('failure', () {

pkg/dartdev/test/commands/test_test.dart

@@ -69,7 +69,11 @@ void defineTest() {
 
   test('no package:test dependency', () {
     p = project(mainSrc: 'int get foo => 1;\n');
-    p.file('pubspec.yaml', 'name: ${p.name}\n');
+    p.file('pubspec.yaml', '''
+name: ${p.name}
+environment:
+  sdk: '>=2.10.0 <3.0.0'
+''');
 
     var result = p.runSync('pub', ['get']);
     expect(result.exitCode, 0);

pkg/dartdev/test/utils.dart

@@ -42,7 +42,14 @@ class TestProject {
     this.logAnalytics = false,
   }) {
     dir = Directory.systemTemp.createTempSync('dartdev');
-    file('pubspec.yaml', 'name: $name\ndev_dependencies:\n  test: any\n');
+    file('pubspec.yaml', '''
+name: $name
+environment:
+  sdk: '>=2.10.0 <3.0.0'
+
+dev_dependencies:
+  test: any
+''');
     if (analysisOptions != null) {
       file('analysis_options.yaml', analysisOptions);
     }

tools/bots/pub_integration_test.py

@@ -11,6 +11,8 @@ import shutil
 import tempfile
 
 PUBSPEC = """name: pub_integration_test
+environment:
+  sdk: '>=2.10.0 <=3.0.0'
 dependencies:
   shelf:
   test: