Add a tag to ExecutionRequirements that allows disabling local prefetch

Remove SpawnExecutionPolicy.shouldPrefetchInputsForLocalExecution in favor of
a static helper method in Spawns.

PiperOrigin-RevId: 158119993

4 files changed, 15 insertions, 8 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/actions/ExecutionRequirements.java b/src/main/java/com/google/devtools/build/lib/actions/ExecutionRequirements.java
index a31f4d1e50..ad324fd805 100644
--- a/src/main/java/com/google/devtools/build/lib/actions/ExecutionRequirements.java
+++ b/src/main/java/com/google/devtools/build/lib/actions/ExecutionRequirements.java
@@ -107,6 +107,9 @@ public class ExecutionRequirements {
   /** If an action would not successfully run other than on Darwin. */
   public static final String REQUIRES_DARWIN = "requires-darwin";
 
+  /** Whether we should disable prefetching of inputs before running a local action. */
+  public static final String DISABLE_LOCAL_PREFETCH = "disable-local-prefetch";
+
   /** How many hardware threads an action requires for execution. */
   public static final ParseableRequirement CPU =
       ParseableRequirement.create(
diff --git a/src/main/java/com/google/devtools/build/lib/actions/Spawns.java b/src/main/java/com/google/devtools/build/lib/actions/Spawns.java
index af8ca07881..be4a0db1ad 100644
--- a/src/main/java/com/google/devtools/build/lib/actions/Spawns.java
+++ b/src/main/java/com/google/devtools/build/lib/actions/Spawns.java
@@ -48,6 +48,16 @@ public final class Spawns {
     }
   }
 
+  /**
+   * Returns whether a local {@link Spawn} runner implementation should prefetch the inputs before
+   * execution, based on the spawns execution info.
+   */
+  public static boolean shouldPrefetchInputsForLocalExecution(Spawn spawn) {
+    String disablePrefetchRequest =
+        spawn.getExecutionInfo().get(ExecutionRequirements.DISABLE_LOCAL_PREFETCH);
+    return (disablePrefetchRequest == null) || disablePrefetchRequest.equals("0");
+  }
+
   /** Convert a spawn into a Bourne shell command. */
   public static String asShellCommand(Spawn spawn, Path workingDirectory) {
     return asShellCommand(spawn.getArguments(), workingDirectory, spawn.getEnvironment());
diff --git a/src/main/java/com/google/devtools/build/lib/exec/SpawnRunner.java b/src/main/java/com/google/devtools/build/lib/exec/SpawnRunner.java
index da25744ff4..a95f144ecc 100644
--- a/src/main/java/com/google/devtools/build/lib/exec/SpawnRunner.java
+++ b/src/main/java/com/google/devtools/build/lib/exec/SpawnRunner.java
@@ -119,13 +119,6 @@ public interface SpawnRunner {
    * be used by different threads, so they MUST not call any shared non-thread-safe objects.
    */
   public interface SpawnExecutionPolicy {
-    /**
-     * Returns whether inputs should be prefetched to the local machine using {@link
-     * ActionInputPrefetcher} if the spawn is executed locally (with or without sandboxing).
-     */
-    // TODO(ulfjack): Use an execution info value instead.
-    boolean shouldPrefetchInputsForLocalExecution(Spawn spawn);
-
     /** The input file cache for this specific spawn. */
     ActionInputFileCache getActionInputFileCache();
 
diff --git a/src/main/java/com/google/devtools/build/lib/exec/local/LocalSpawnRunner.java b/src/main/java/com/google/devtools/build/lib/exec/local/LocalSpawnRunner.java
index b96a2269ca..7580a25a2c 100644
--- a/src/main/java/com/google/devtools/build/lib/exec/local/LocalSpawnRunner.java
+++ b/src/main/java/com/google/devtools/build/lib/exec/local/LocalSpawnRunner.java
@@ -23,6 +23,7 @@ import com.google.devtools.build.lib.actions.ActionExecutionMetadata;
 import com.google.devtools.build.lib.actions.ResourceManager;
 import com.google.devtools.build.lib.actions.ResourceManager.ResourceHandle;
 import com.google.devtools.build.lib.actions.Spawn;
+import com.google.devtools.build.lib.actions.Spawns;
 import com.google.devtools.build.lib.concurrent.ThreadSafety.ThreadSafe;
 import com.google.devtools.build.lib.exec.ActionInputPrefetcher;
 import com.google.devtools.build.lib.exec.SpawnResult;
@@ -223,7 +224,7 @@ public final class LocalSpawnRunner implements SpawnRunner {
             .build();
       }
 
-      if (policy.shouldPrefetchInputsForLocalExecution(spawn)) {
+      if (Spawns.shouldPrefetchInputsForLocalExecution(spawn)) {
         stepLog(INFO, "prefetching inputs for local execution");
         setState(State.PREFETCHING_LOCAL_INPUTS);
         actionInputPrefetcher.prefetchFiles(policy.getInputMapping().values());