Introduce option flag experimental_enable_tools_defaults_package.

Default value is true, and behavior related to //tools/defaults package is not
changed. If set it to false, then in-memory Dfaultpacked will not be created.

RELNOTES:none
PiperOrigin-RevId: 205643628

1 files changed, 11 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/PrecomputedValue.java b/src/main/java/com/google/devtools/build/lib/skyframe/PrecomputedValue.java
index ad91c60730..937e59c782 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/PrecomputedValue.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/PrecomputedValue.java
@@ -79,6 +79,17 @@ public final class PrecomputedValue implements SkyValue {
     return new Injected(precomputed, Suppliers.ofInstance(value));
   }
 
+  public static final Precomputed<Boolean> ENABLE_DEFAULTS_PACKAGE =
+      new Precomputed<>(Key.create("enable_default_pkg"));
+
+  // TODO(dbabkin): better to move this code to PrecomputedValueUtils.
+  // It will gone soon after removing tools/defaults
+  public static boolean isInMemoryToolsDefaults(SkyFunction.Environment env)
+      throws InterruptedException {
+    Boolean enableDefaultsPackage = PrecomputedValue.ENABLE_DEFAULTS_PACKAGE.get(env);
+    return Preconditions.checkNotNull(enableDefaultsPackage);
+  }
+
   public static final Precomputed<String> DEFAULTS_PACKAGE_CONTENTS =
       new Precomputed<>(Key.create("default_pkg"));