Disable email notification on package published events. (dart-lang#7392)

CHANGELOG.md

@@ -2,6 +2,7 @@ Important changes to data models, configuration, and migrations between each
 AppEngine version, listed here to ease deployment and troubleshooting.
 
 ## Next Release (replace with git tag when deployed)
+ * Note: temporarily disabled email notification on package published events.
 
 ## `20240111t095800-all`
  * Bumped runtimeVersion to `2024.01.10`.

app/lib/package/backend.dart

@@ -1126,7 +1126,8 @@ class PackageBackend {
         newVersion,
         entities.packageVersionInfo,
         ...entities.assets,
-        outgoingEmail,
+        if (activeConfiguration.isPublishedEmailNotificationEnabled)
+          outgoingEmail,
         AuditLogRecord.packagePublished(
           uploader: agent,
           package: newVersion.package,
@@ -1168,7 +1169,8 @@ class PackageBackend {
   ) async {
     try {
       await Future.wait([
-        emailBackend.trySendOutgoingEmail(outgoingEmail),
+        if (activeConfiguration.isPublishedEmailNotificationEnabled)
+          emailBackend.trySendOutgoingEmail(outgoingEmail),
         taskBackend.trackPackage(newVersion.package, updateDependants: true),
         if (apiExporter != null)
           apiExporter!

app/lib/shared/configuration.dart

@@ -454,6 +454,9 @@ class Configuration {
   late final isProduction = projectId == 'dartlang-pub';
   late final isNotProduction = !isProduction;
   late final isStaging = projectId == 'dartlang-pub-dev';
+
+  /// NOTE: email notification on package published is temporarily disabled.
+  late final isPublishedEmailNotificationEnabled = isNotProduction;
 }
 
 /// Data structure to describe an admin user.