Add toString() methods for Advertised and Required Providers.

RELNOTES: None.
PiperOrigin-RevId: 169582778

2 files changed, 14 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/packages/AdvertisedProviderSet.java b/src/main/java/com/google/devtools/build/lib/packages/AdvertisedProviderSet.java
index 3f8686b16a..c8f03e0651 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/AdvertisedProviderSet.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/AdvertisedProviderSet.java
@@ -87,6 +87,15 @@ public final class AdvertisedProviderSet {
         && Objects.equals(this.skylarkProviders, that.skylarkProviders);
   }
 
+  @Override
+  public String toString() {
+    if (canHaveAnyProvider()) {
+      return "Any Provider";
+    }
+    return String.format("allowed native providers=%s, allowed skylark providers=%s",
+        getNativeProviders(), getSkylarkProviders());
+  }
+
   /** Checks whether the rule can have any provider.
    *
    *  Used for alias rules.
diff --git a/src/main/java/com/google/devtools/build/lib/packages/RequiredProviders.java b/src/main/java/com/google/devtools/build/lib/packages/RequiredProviders.java
index 5b494b7d07..7ccdcca829 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/RequiredProviders.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/RequiredProviders.java
@@ -57,6 +57,11 @@ public final class RequiredProviders {
     return constraint.getDescription(this);
   }
 
+  @Override
+  public String toString() {
+    return getDescription();
+  }
+
   /**
    * Represents one of the constraints as desctibed in {@link RequiredProviders}
    */