Refactor root cause reporting in ConfiguredTargetFunction

We now track Causes instead of plain Labels, which will allow us to do better reporting in the future. Add basic tests.

PiperOrigin-RevId: 198380468

1 files changed, 27 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/pkgcache/LoadingFailureEvent.java b/src/main/java/com/google/devtools/build/lib/pkgcache/LoadingFailureEvent.java
index 45305d2075..4ee722fcd4 100644
--- a/src/main/java/com/google/devtools/build/lib/pkgcache/LoadingFailureEvent.java
+++ b/src/main/java/com/google/devtools/build/lib/pkgcache/LoadingFailureEvent.java
@@ -13,7 +13,9 @@
 // limitations under the License.
 package com.google.devtools.build.lib.pkgcache;
 
+import com.google.common.base.MoreObjects;
 import com.google.devtools.build.lib.cmdline.Label;
+import java.util.Objects;
 
 /**
  * This event is fired during the build, when it becomes known that the loading
@@ -29,6 +31,14 @@ public class LoadingFailureEvent {
     this.failureReason = failureReason;
   }
 
+  @Override
+  public String toString() {
+    return MoreObjects.toStringHelper(this)
+        .add("failedTarget", failedTarget)
+        .add("failureReason", failureReason)
+        .toString();
+  }
+
   public Label getFailedTarget() {
     return failedTarget;
   }
@@ -36,4 +46,21 @@ public class LoadingFailureEvent {
   public Label getFailureReason() {
     return failureReason;
   }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    } else if (!(o instanceof LoadingFailureEvent)) {
+      return false;
+    }
+    LoadingFailureEvent a = (LoadingFailureEvent) o;
+    return Objects.equals(failedTarget, a.failedTarget)
+        && Objects.equals(failureReason, a.failureReason);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(failedTarget, failureReason);
+  }
 }