Add a method `ActionLookupKey#mayOwnShareableActions` that corresponds with the logic to determine whether to create a shareable `ActionLookupData`.

PiperOrigin-RevId: 417444843

src/main/java/com/google/devtools/build/lib/actions/ActionLookupData.java

diff --git a/src/main/java/com/google/devtools/build/lib/actions/ActionLookupData.java b/src/main/java/com/google/devtools/build/lib/actions/ActionLookupData.java
index 4e4282c..573689c 100644
--- a/src/main/java/com/google/devtools/build/lib/actions/ActionLookupData.java
+++ b/src/main/java/com/google/devtools/build/lib/actions/ActionLookupData.java
@@ -36,11 +36,9 @@
    * only be called once per {@code (actionLookupKey, actionIndex)} pair.
    */
   public static ActionLookupData create(ActionLookupKey actionLookupKey, int actionIndex) {
-    // If the label is null, this is not a typical action (it may be the build info action or a
-    // coverage action, for example). Don't try to share it.
-    return actionLookupKey.getLabel() == null
-        ? createUnshareable(actionLookupKey, actionIndex)
-        : new ActionLookupData(actionLookupKey, actionIndex);
+    return actionLookupKey.mayOwnShareableActions()
+        ? new ActionLookupData(actionLookupKey, actionIndex)
+        : createUnshareable(actionLookupKey, actionIndex);
   }
 
   /**

src/main/java/com/google/devtools/build/lib/actions/ActionLookupKey.java

diff --git a/src/main/java/com/google/devtools/build/lib/actions/ActionLookupKey.java b/src/main/java/com/google/devtools/build/lib/actions/ActionLookupKey.java
index c7b0095..6c609d4 100644
--- a/src/main/java/com/google/devtools/build/lib/actions/ActionLookupKey.java
+++ b/src/main/java/com/google/devtools/build/lib/actions/ActionLookupKey.java
@@ -38,4 +38,19 @@
    */
   @Nullable
   BuildConfigurationKey getConfigurationKey();
+
+  /**
+   * Returns {@code true} if this key <em>may</em> own shareable actions, as determined by {@link
+   * ActionLookupData#valueIsShareable}.
+   *
+   * <p>Returns {@code false} for some non-standard keys such as the build info key and coverage
+   * report key.
+   *
+   * <p>A return of {@code true} still requires checking {@link ActionLookupData#valueIsShareable}
+   * to determine whether the individual action can be shared - notably, for a test target,
+   * compilation actions are shareable, but test actions are not.
+   */
+  default boolean mayOwnShareableActions() {
+    return getLabel() != null;
+  }
 }