Multiplex worker fixes and tests for Android busybox tools

src/main/java/com/google/devtools/build/lib/rules/android/AndroidConfiguration.java

@@ -938,6 +938,7 @@ public static class Options extends FragmentOptions {
             "Enable persistent and multiplexed Android tools (dexing, desugaring, resource "
                 + "processing).",
         expansion = {
+          "--internal_persistent_multiplex_busybox_tools",
           "--persistent_multiplex_android_resource_processor",
           "--persistent_multiplex_android_dex_desugar",
         })
@@ -962,6 +963,17 @@ public static class Options extends FragmentOptions {
         help = "Tracking flag for when busybox workers are enabled.")
     public boolean persistentBusyboxTools;
 
+    @Option(
+        name = "internal_persistent_multiplex_busybox_tools",
+        documentationCategory = OptionDocumentationCategory.UNDOCUMENTED,
+        effectTags = {
+          OptionEffectTag.HOST_MACHINE_RESOURCE_OPTIMIZATIONS,
+          OptionEffectTag.EXECUTION,
+        },
+        defaultValue = "false",
+        help = "Tracking flag for when multiplexed busybox workers are enabled.")
+    public boolean persistentMultiplexBusyboxTools;
+
     @Option(
         name = "experimental_remove_r_classes_from_instrumentation_test_jar",
         defaultValue = "true",
@@ -1096,6 +1108,7 @@ public FragmentOptions getHost() {
           oneVersionEnforcementUseTransitiveJarsForBinaryUnderTest;
       host.persistentBusyboxTools = persistentBusyboxTools;
       host.disableNativeAndroidRules = disableNativeAndroidRules;
+      host.persistentMultiplexBusyboxTools = persistentMultiplexBusyboxTools;
 
       // Unless the build was started from an Android device, host means MAIN.
       host.configurationDistinguisher = ConfigurationDistinguisher.MAIN;
@@ -1141,6 +1154,7 @@ public FragmentOptions getHost() {
   private final boolean dataBindingUpdatedArgs;
   private final boolean dataBindingAndroidX;
   private final boolean persistentBusyboxTools;
+  private final boolean persistentMultiplexBusyboxTools;
   private final boolean filterRJarsFromAndroidTest;
   private final boolean removeRClassesFromInstrumentationTestJar;
   private final boolean alwaysFilterDuplicateClassesFromAndroidTest;
@@ -1201,6 +1215,7 @@ public AndroidConfiguration(BuildOptions buildOptions) throws InvalidConfigurati
     this.dataBindingUpdatedArgs = options.dataBindingUpdatedArgs;
     this.dataBindingAndroidX = options.dataBindingAndroidX;
     this.persistentBusyboxTools = options.persistentBusyboxTools;
+    this.persistentMultiplexBusyboxTools = options.persistentMultiplexBusyboxTools;
     this.filterRJarsFromAndroidTest = options.filterRJarsFromAndroidTest;
     this.removeRClassesFromInstrumentationTestJar =
         options.removeRClassesFromInstrumentationTestJar;
@@ -1453,6 +1468,11 @@ public boolean persistentBusyboxTools() {
     return persistentBusyboxTools;
   }
 
+  @Override
+  public boolean persistentMultiplexBusyboxTools() {
+    return persistentMultiplexBusyboxTools;
+  }
+
   @Override
   public boolean incompatibleUseToolchainResolution() {
     return incompatibleUseToolchainResolution;

src/main/java/com/google/devtools/build/lib/rules/android/AndroidDataContext.java

@@ -64,6 +64,7 @@ public class AndroidDataContext implements AndroidDataContextApi {
   private final FilesToRunProvider busybox;
   private final AndroidSdkProvider sdk;
   private final boolean persistentBusyboxToolsEnabled;
+  private final boolean persistentMultiplexBusyboxToolsEnabled;
   private final boolean optOutOfResourcePathShortening;
   private final boolean optOutOfResourceNameObfuscation;
   private final boolean throwOnShrinkResources;
@@ -90,6 +91,7 @@ public static AndroidDataContext makeContext(RuleContext ruleContext) {
         ruleContext,
         ruleContext.getExecutablePrerequisite("$android_resources_busybox"),
         androidConfig.persistentBusyboxTools(),
+        androidConfig.persistentMultiplexBusyboxTools(),
         AndroidSdkProvider.fromRuleContext(ruleContext),
         hasExemption(ruleContext, "allow_raw_access_to_resource_paths", false),
         hasExemption(ruleContext, "allow_resource_name_obfuscation_opt_out", false),
@@ -114,6 +116,7 @@ protected AndroidDataContext(
       RuleContext ruleContext,
       FilesToRunProvider busybox,
       boolean persistentBusyboxToolsEnabled,
+      boolean persistentMultiplexBusyboxToolsEnabled,
       AndroidSdkProvider sdk,
       boolean optOutOfResourcePathShortening,
       boolean optOutOfResourceNameObfuscation,
@@ -126,6 +129,7 @@ protected AndroidDataContext(
       boolean includeProguardLocationReferences,
       ImmutableMap<String, String> executionInfo) {
     this.persistentBusyboxToolsEnabled = persistentBusyboxToolsEnabled;
+    this.persistentMultiplexBusyboxToolsEnabled = persistentMultiplexBusyboxToolsEnabled;
     this.ruleContext = ruleContext;
     this.busybox = busybox;
     this.sdk = sdk;
@@ -222,6 +226,10 @@ public boolean isPersistentBusyboxToolsEnabled() {
     return persistentBusyboxToolsEnabled;
   }
 
+  public boolean isPersistentMultiplexBusyboxToolsEnabled() {
+    return persistentMultiplexBusyboxToolsEnabled;
+  }
+
   public boolean optOutOfResourcePathShortening() {
     return optOutOfResourcePathShortening;
   }

src/main/java/com/google/devtools/build/lib/rules/android/BusyBoxActionBuilder.java

@@ -369,6 +369,10 @@ public void buildAndRegister(String message, String mnemonic) {
       commandLine.add("--logWarnings=false");
       spawnActionBuilder.addCommandLine(commandLine.build(), WORKERS_FORCED_PARAM_FILE_INFO);
       executionInfo.putAll(ExecutionRequirements.WORKER_MODE_ENABLED);
+
+      if (dataContext.isPersistentMultiplexBusyboxToolsEnabled()) {
+        executionInfo.putAll(ExecutionRequirements.WORKER_MULTIPLEX_MODE_ENABLED);
+      }
     } else {
       spawnActionBuilder.addCommandLine(commandLine.build(), FORCED_PARAM_FILE_INFO);
     }

src/main/java/com/google/devtools/build/lib/starlarkbuildapi/android/AndroidConfigurationApi.java

@@ -231,6 +231,13 @@ public interface AndroidConfigurationApi extends StarlarkValue {
       documented = false)
   boolean persistentBusyboxTools();
 
+  @StarlarkMethod(
+      name = "persistent_multiplex_busybox_tools",
+      structField = true,
+      doc = "",
+      documented = false)
+  boolean persistentMultiplexBusyboxTools();
+
   @StarlarkMethod(
       name = "get_output_directory_name",
       structField = true,

src/test/shell/bazel/android/resource_processing_integration_test.sh

@@ -111,7 +111,13 @@ function test_persistent_resource_processor() {
   create_android_binary
   setup_font_resources
 
-  assert_build //java/bazel:bin --persistent_android_resource_processor
+  assert_build //java/bazel:bin --persistent_android_resource_processor \
+    --worker_verbose &> $TEST_log
+  expect_log "Created new non-sandboxed AndroidResourceParser worker (id [0-9]\+)"
+  expect_log "Created new non-sandboxed AndroidResourceCompiler worker (id [0-9]\+)"
+  expect_log "Created new non-sandboxed AndroidCompiledResourceMerger worker (id [0-9]\+)"
+  expect_log "Created new non-sandboxed AndroidAapt2 worker (id [0-9]\+)"
+  expect_log "Created new non-sandboxed ManifestMerger worker (id [0-9]\+)"
 }
 
 function test_persistent_multiplex_resource_processor() {
@@ -121,7 +127,13 @@ function test_persistent_multiplex_resource_processor() {
   setup_font_resources
 
   assert_build //java/bazel:bin --experimental_worker_multiplex \
-    --persistent_multiplex_android_tools
+    --persistent_multiplex_android_tools \
+    --worker_verbose &> $TEST_log
+  expect_log "Created new non-sandboxed AndroidResourceParser multiplex-worker (id [0-9]\+)"
+  expect_log "Created new non-sandboxed AndroidResourceCompiler multiplex-worker (id [0-9]\+)"
+  expect_log "Created new non-sandboxed AndroidCompiledResourceMerger multiplex-worker (id [0-9]\+)"
+  expect_log "Created new non-sandboxed AndroidAapt2 multiplex-worker (id [0-9]\+)"
+  expect_log "Created new non-sandboxed ManifestMerger multiplex-worker (id [0-9]\+)"
 }
 
 run_suite "Resource processing integration tests"