From bdf71ae0a3d45390ea561f3197afbd241a707e52 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 24 Apr 2026 19:45:08 +0000
Subject: [PATCH] Add XA0119 warning for Debug builds with PublishReadyToRun

Add XA0119_ReadyToRun warning that fires when PublishReadyToRun is set
in a Debug/fast-deployment configuration, matching the existing pattern
for AotAssemblies. Update Resources.resx, Resources.Designer.cs,
Xamarin.Android.Common.targets, and xa0119.md documentation.

Agent-Logs-Url: https://github.com/dotnet/android/sessions/6cdbfb09-1398-4fbd-b5b5-111ce3992917

Co-authored-by: jonathanpeppers <840039+jonathanpeppers@users.noreply.github.com>
---
 Documentation/docs-mobile/messages/xa0119.md             | 3 +++
 .../Properties/Resources.Designer.cs                     | 9 +++++++++
 .../Properties/Resources.resx                            | 4 ++++
 .../Xamarin.Android.Common.targets                       | 4 ++++
 4 files changed, 20 insertions(+)

diff --git a/Documentation/docs-mobile/messages/xa0119.md b/Documentation/docs-mobile/messages/xa0119.md
index ad186cd0dc9..a4fed4e974a 100644
--- a/Documentation/docs-mobile/messages/xa0119.md
+++ b/Documentation/docs-mobile/messages/xa0119.md
@@ -22,6 +22,8 @@ Remove the following options from `Debug` configurations:
   * `<AndroidLinkMode>Full</AndroidLinkMode>`
 * AOT
   * `<AotAssemblies>True</AotAssemblies>`
+* ReadyToRun
+  * `<PublishReadyToRun>True</PublishReadyToRun>`
 * Code Shrinker
   * `<AndroidEnableProguard>True</AndroidEnableProguard>`
   * `<EnableProguard>True</EnableProguard>`
@@ -43,6 +45,7 @@ Remove the following from `Release` configurations:
 
 * `<EmbedAssembliesIntoApk>True</EmbedAssembliesIntoApk>`
 * `<AotAssemblies>True</AotAssemblies>` or in .NET 6 `<RunAOTCompilation>True</RunAOTCompilation>`
+* `<PublishReadyToRun>True</PublishReadyToRun>` (for CoreCLR)
 
 Consider submitting a [bug][bug] if you are getting one of these
 warnings under normal circumstances.
diff --git a/src/Xamarin.Android.Build.Tasks/Properties/Resources.Designer.cs b/src/Xamarin.Android.Build.Tasks/Properties/Resources.Designer.cs
index 03e8aa2ea48..1ff99963a95 100644
--- a/src/Xamarin.Android.Build.Tasks/Properties/Resources.Designer.cs
+++ b/src/Xamarin.Android.Build.Tasks/Properties/Resources.Designer.cs
@@ -447,6 +447,15 @@ public static string XA0119_Interpreter {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Using fast deployment and ReadyToRun at the same time is not recommended. Use fast deployment for Debug configurations and ReadyToRun for Release configurations..
+        /// </summary>
+        public static string XA0119_ReadyToRun {
+            get {
+                return ResourceManager.GetString("XA0119_ReadyToRun", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Using fast deployment and the linker at the same time is not recommended. Use fast deployment for Debug configurations and the linker for Release configurations..
         /// </summary>
diff --git a/src/Xamarin.Android.Build.Tasks/Properties/Resources.resx b/src/Xamarin.Android.Build.Tasks/Properties/Resources.resx
index bdfc38d26bc..66dca6c1457 100644
--- a/src/Xamarin.Android.Build.Tasks/Properties/Resources.resx
+++ b/src/Xamarin.Android.Build.Tasks/Properties/Resources.resx
@@ -306,6 +306,10 @@ The term "lock file" comes from NuGet. For example, search for "UnauthorizedLock
     <value>Disabling the interpreter; using the interpreter and AOT at the same time is not supported. Use the interpreter for hot reload support in Debug configurations and AOT for Release configurations.</value>
     <comment>The following are literal names and should not be translated: AOT, Debug, Release.</comment>
   </data>
+  <data name="XA0119_ReadyToRun" xml:space="preserve">
+    <value>Using fast deployment and ReadyToRun at the same time is not recommended. Use fast deployment for Debug configurations and ReadyToRun for Release configurations.</value>
+    <comment>The following are literal names and should not be translated: ReadyToRun, Debug, Release.</comment>
+  </data>
   <data name="XA0121" xml:space="preserve">
     <value>Assembly '{0}' is using '[assembly: {1}]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.</value>
     <comment>The following are literal names and should not be translated: [assembly: {1}], NuGet
diff --git a/src/Xamarin.Android.Build.Tasks/Xamarin.Android.Common.targets b/src/Xamarin.Android.Build.Tasks/Xamarin.Android.Common.targets
index d8d09f7aee4..f820e0e3616 100644
--- a/src/Xamarin.Android.Build.Tasks/Xamarin.Android.Common.targets
+++ b/src/Xamarin.Android.Build.Tasks/Xamarin.Android.Common.targets
@@ -533,6 +533,10 @@ Copyright (C) 2011-2012 Xamarin. All rights reserved.
       ResourceName="XA0119_Interpreter"
       Condition=" '$(AndroidUseInterpreter)' == 'True' And '$(AotAssemblies)' == 'True' "
   />
+  <AndroidWarning Code="XA0119"
+      ResourceName="XA0119_ReadyToRun"
+      Condition=" '$(EmbedAssembliesIntoApk)' != 'True' And '$(PublishReadyToRun)' == 'True' "
+  />
   <AndroidWarning Code="XA1027"
       ResourceName="XA1027"
       Condition=" $(_AndroidXA1027) == 'true' "