Inject the prelude path through the rule class provider.
--
MOS_MIGRATED_REVID=102020499
diff --git a/src/main/java/com/google/devtools/build/lib/packages/RuleClassProvider.java b/src/main/java/com/google/devtools/build/lib/packages/RuleClassProvider.java
index 3f24efb..d153fa1 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/RuleClassProvider.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/RuleClassProvider.java
@@ -17,6 +17,7 @@
import com.google.devtools.build.lib.events.EventHandler;
import com.google.devtools.build.lib.syntax.SkylarkEnvironment;
import com.google.devtools.build.lib.syntax.ValidationEnvironment;
+import com.google.devtools.build.lib.vfs.PathFragment;
import java.util.Map;
@@ -24,6 +25,12 @@
* The collection of the supported build rules. Provides an Environment for Skylark rule creation.
*/
public interface RuleClassProvider {
+
+ /**
+ * Workspace relative path to the prelude file.
+ */
+ PathFragment getPreludePath();
+
/**
* Returns a map from rule names to rule class objects.
*/