Add deprecation warning message to mobile-install classic mode.

We've notified the top classic users by email that classic mode is deprecated.
As we are no longer actively supporting classic mode, we'd like users to move
over to skylark.

RELNOTES: None.
PiperOrigin-RevId: 182268733

1 files changed, 6 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/runtime/mobileinstall/MobileInstallCommand.java b/src/main/java/com/google/devtools/build/lib/runtime/mobileinstall/MobileInstallCommand.java
index 0f297c2e1e..acdd49784d 100644
--- a/src/main/java/com/google/devtools/build/lib/runtime/mobileinstall/MobileInstallCommand.java
+++ b/src/main/java/com/google/devtools/build/lib/runtime/mobileinstall/MobileInstallCommand.java
@@ -172,6 +172,12 @@ public class MobileInstallCommand implements BlazeCommand {
     WriteAdbArgsAction.Options adbOptions = options.getOptions(WriteAdbArgsAction.Options.class);
 
     if (mobileInstallOptions.mode == Mode.CLASSIC) {
+      // Notify internal users that classic mode is deprecated. Use mobile_install_aspect as a proxy
+      // for internal vs external users.
+      if (!mobileInstallOptions.mobileInstallAspect.startsWith("@")) {
+        env.getReporter().handle(Event.warn(
+            "mobile-install --mode=classic is deprecated. This option will go away soon."));
+      }
       if (adbOptions.start == StartType.WARM && !mobileInstallOptions.incremental) {
         env.getReporter().handle(Event.warn(
            "Warm start is enabled, but will have no effect on a non-incremental build"));