Ignore .cxx/ directories

.gitignore

@@ -53,6 +53,7 @@ GeneratedPluginRegistrant.*
 .gradle/
 gradlew
 gradlew.bat
+.cxx/
 
 .project
 .classpath

script/tool/lib/src/drive_examples_command.dart

@@ -71,7 +71,13 @@ class DriveExamplesCommand extends PackageLoopingCommand {
 
   @override
   bool shouldIgnoreFile(String path) {
-    return isRepoLevelNonCodeImpactingFile(path) || isPackageSupportFile(path);
+    return isRepoLevelNonCodeImpactingFile(path) ||
+        isPackageSupportFile(path) ||
+        // This isn't part of isRepoLevelNonCodeImpactingFile since there could
+        // potentially be code-based commands that it could affect, but it
+        // should not affect integration tests, and they are the most expensive
+        // and flaky tests.
+        path == '.gitignore';
   }
 
   @override

script/tool/test/drive_examples_command_test.dart

@@ -1763,6 +1763,7 @@ packages/package_a/$file
           FakeProcessInfo(MockProcess(stdout: '''
 README.md
 CODEOWNERS
+.gitignore
 packages/package_a/CHANGELOG.md
 ''')),
         ];