[ci] presubmit flags pending changelog with version promote on post 1…

script/tool/lib/src/validators/version_and_changelog_validator.dart

@@ -634,6 +634,18 @@ ${_indentation}The first version listed in CHANGELOG.md is $fromChangeLog.
         errors.add('pubspec.yaml version changed');
       }
     }
+
+    final bool hasPromote = allChangelogs.any(
+      (PendingChangelogEntry entry) => entry.version == VersionChange.promote,
+    );
+    if (hasPromote) {
+      final Version version = package.parsePubspec().version!;
+      if (version.major != 0) {
+        printError('"promote" is only valid for pre-1.0 packages.');
+        errors.add('Invalid promote version change for post-1.0 package');
+      }
+    }
+
     return versionChanged;
   }
 

script/tool/test/validate_command_version_test.dart

@@ -1836,6 +1836,95 @@ packages/package/pending_changelogs/some_change.yaml
 
         expect(output, containsAllInOrder(<Matcher>[contains('No issues found!')]));
       });
+
+      test('fails for batch release package with version promote on post-1.0 package', () async {
+        final RepositoryPackage package = createFakePackage(
+          'package',
+          packagesDir,
+          version: '1.0.0',
+        );
+        package.ciConfigFile.writeAsStringSync('''
+release:
+  batch: true
+''');
+        package.libDirectory.childFile('foo.dart').writeAsStringSync('void foo() {}');
+        final Directory pendingChangelogs = package.directory.childDirectory('pending_changelogs');
+        pendingChangelogs.createSync();
+        pendingChangelogs.childFile('some_change.yaml').writeAsStringSync('''
+changelog: "Promoting"
+version: promote
+''');
+
+        gitProcessRunner.mockProcessesForExecutable['git-diff'] = <FakeProcessInfo>[
+          FakeProcessInfo(
+            MockProcess(
+              stdout: '''
+packages/package/lib/foo.dart
+packages/package/pending_changelogs/some_change.yaml
+''',
+            ),
+          ),
+        ];
+        gitProcessRunner.mockProcessesForExecutable['git-show'] = <FakeProcessInfo>[
+          FakeProcessInfo(MockProcess(stdout: 'version: 1.0.0')),
+        ];
+
+        Error? commandError;
+        final List<String> output = await runCapturingPrint(
+          runner,
+          <String>['validate', '--base-sha=main', '--check-for-missing-changes'],
+          errorHandler: (Error e) {
+            commandError = e;
+          },
+        );
+
+        expect(commandError, isA<ToolExit>());
+        expect(
+          output,
+          containsAllInOrder(<Matcher>[contains('"promote" is only valid for pre-1.0 packages.')]),
+        );
+      });
+
+      test('passes for batch release package with version promote on pre-1.0 package', () async {
+        final RepositoryPackage package = createFakePackage(
+          'package',
+          packagesDir,
+          version: '0.9.0',
+        );
+        package.ciConfigFile.writeAsStringSync('''
+release:
+  batch: true
+''');
+        package.libDirectory.childFile('foo.dart').writeAsStringSync('void foo() {}');
+        final Directory pendingChangelogs = package.directory.childDirectory('pending_changelogs');
+        pendingChangelogs.createSync();
+        pendingChangelogs.childFile('some_change.yaml').writeAsStringSync('''
+changelog: "Promoting"
+version: promote
+''');
+
+        gitProcessRunner.mockProcessesForExecutable['git-diff'] = <FakeProcessInfo>[
+          FakeProcessInfo(
+            MockProcess(
+              stdout: '''
+packages/package/lib/foo.dart
+packages/package/pending_changelogs/some_change.yaml
+''',
+            ),
+          ),
+        ];
+        gitProcessRunner.mockProcessesForExecutable['git-show'] = <FakeProcessInfo>[
+          FakeProcessInfo(MockProcess(stdout: 'version: 0.9.0')),
+        ];
+
+        final List<String> output = await runCapturingPrint(runner, <String>[
+          'validate',
+          '--base-sha=main',
+          '--check-for-missing-changes',
+        ]);
+
+        expect(output, containsAllInOrder(<Matcher>[contains('No issues found!')]));
+      });
     });
   });