--
MOS_MIGRATED_REVID=126410490
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/RuleDefinitionEnvironment.java b/src/main/java/com/google/devtools/build/lib/analysis/RuleDefinitionEnvironment.java
index 45200fb..5880e95 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/RuleDefinitionEnvironment.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/RuleDefinitionEnvironment.java
@@ -32,4 +32,9 @@
    * using {@link RuleDefinitionEnvironment#getLabel}
    */
   Label getToolsLabel(String labelValue);
+
+  /**
+   * Returns the tools repository prefix.
+   */
+  String getToolsRepository();
 }