Include the file count in ChangedFilesMessage.

--
MOS_MIGRATED_REVID=116292374

1 files changed, 8 insertions, 4 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/SkyframeIncrementalBuildMonitor.java b/src/main/java/com/google/devtools/build/lib/skyframe/SkyframeIncrementalBuildMonitor.java
index a719bec42e..bb277160c1 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/SkyframeIncrementalBuildMonitor.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/SkyframeIncrementalBuildMonitor.java
@@ -13,6 +13,7 @@
 // limitations under the License.
 package com.google.devtools.build.lib.skyframe;
 
+import com.google.common.collect.ImmutableSet;
 import com.google.common.eventbus.EventBus;
 import com.google.devtools.build.lib.actions.ChangedFilesMessage;
 import com.google.devtools.build.lib.concurrent.ThreadSafety;
@@ -30,9 +31,11 @@ import java.util.Set;
  */
 @ThreadSafety.ThreadCompatible
 class SkyframeIncrementalBuildMonitor {
-  private Set<PathFragment> files = new HashSet<>();
   private static final int MAX_FILES = 100;
 
+  private Set<PathFragment> files = new HashSet<>();
+  private int fileCount;
+
   public void accrue(Iterable<SkyKey> invalidatedValues) {
     for (SkyKey skyKey : invalidatedValues) {
       if (skyKey.functionName().equals(SkyFunctions.FILE_STATE)) {
@@ -49,11 +52,12 @@ class SkyframeIncrementalBuildMonitor {
         files = null;
       }
     }
+
+    fileCount++;
   }
 
   public void alertListeners(EventBus eventBus) {
-    if (files != null) {
-      eventBus.post(new ChangedFilesMessage(files));
-    }
+    Set<PathFragment> changedFiles = (files != null) ? files : ImmutableSet.<PathFragment>of();
+    eventBus.post(new ChangedFilesMessage(changedFiles, fileCount));
   }
 }