Signal that the version command does not build

The version command is not expected to every run any actions.
Hence any messages about progress of the build process or running
actions would be confusing. Therefore, signal this fact to allow
the experimental UI to present information accordingly.

--
Change-Id: I8a75704a39e161f52c4d008677f62e4b36097647
Reviewed-on: https://bazel-review.googlesource.com/#/c/3387
MOS_MIGRATED_REVID=120203058

1 files changed, 2 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/runtime/commands/VersionCommand.java b/src/main/java/com/google/devtools/build/lib/runtime/commands/VersionCommand.java
index ac75f8f528..97f3cc1358 100644
--- a/src/main/java/com/google/devtools/build/lib/runtime/commands/VersionCommand.java
+++ b/src/main/java/com/google/devtools/build/lib/runtime/commands/VersionCommand.java
@@ -14,6 +14,7 @@
 package com.google.devtools.build.lib.runtime.commands;
 
 import com.google.devtools.build.lib.analysis.BlazeVersionInfo;
+import com.google.devtools.build.lib.analysis.NoBuildEvent;
 import com.google.devtools.build.lib.events.Event;
 import com.google.devtools.build.lib.runtime.BlazeCommand;
 import com.google.devtools.build.lib.runtime.Command;
@@ -43,6 +44,7 @@ public final class VersionCommand implements BlazeCommand {
       env.getReporter().handle(Event.error("Version information not available"));
       return ExitCode.COMMAND_LINE_ERROR;
     }
+    env.getEventBus().post(new NoBuildEvent());
     env.getReporter().getOutErr().printOutLn(info.getSummary());
     return ExitCode.SUCCESS;
   }