Flip --enable_bzlmod to true

Bazel tests status:

- Bzlmod disabled:

  - AnalysisTestCase: to be migrated
  - ConfigurationTestCase: to be migrated
  - ConfigCommandTest: to be migrated, probably blocked by a bug

- Bzlmod enabled:

  - BuildViewTestCase: migrated at d51144c
  - Java integration tests migrated at 8d04711
  - Shell integration tests migrated at 175a18d (Bzlmod disabled in some tests)
  - Python integration tests migrated at 50c8375 (Bzlmod disabled in some tests)
  - BuildIntegrationTestCase: migrated in this change
  - Other Java unit tests migrated in this change

Issues identified:

- cc_shared_library doesn't work well with Bzlmod: #19822
- `bazel config` doesn't work well with Bzlmod: #19823

Fixes #18958

Tracking migration of remaining test cases in #19824

RELNOTES[INC]: Bzlmod is enabled by default, please consider migrating your external dependencies from WORKSPACE to MODULE.bazel. Find more details at #18958

PiperOrigin-RevId: 573827480
Change-Id: I097b4bd7caafc996b034284ee688b8f3d2bca1f7

src/main/java/com/google/devtools/build/lib/bazel/BazelRepositoryModule.java

@@ -15,6 +15,7 @@
 
 package com.google.devtools.build.lib.bazel;
 
+import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Preconditions;
 import com.google.common.base.Strings;
 import com.google.common.base.Supplier;
@@ -162,11 +163,19 @@ public class BazelRepositoryModule extends BlazeModule {
 
   @Nullable private CredentialModule credentialModule;
 
+  private ImmutableMap<String, NonRegistryOverride> builtinModules = null;
+
   public BazelRepositoryModule() {
     this.starlarkRepositoryFunction = new StarlarkRepositoryFunction(downloadManager);
     this.repositoryHandlers = repositoryRules();
   }
 
+  @VisibleForTesting
+  public BazelRepositoryModule(ImmutableMap<String, NonRegistryOverride> builtinModules) {
+    this();
+    this.builtinModules = builtinModules;
+  }
+
   private static DetailedExitCode detailedExitCode(String message, ExternalRepository.Code code) {
     return DetailedExitCode.of(
         FailureDetail.newBuilder()
@@ -234,37 +243,39 @@ public void workspaceInit(
     singleExtensionEvalFunction =
         new SingleExtensionEvalFunction(directories, clientEnvironmentSupplier, downloadManager);
 
-    ImmutableMap<String, NonRegistryOverride> builtinModules =
-        ImmutableMap.of(
-            // @bazel_tools is a special repo that we pull from the extracted install dir.
-            "bazel_tools",
-            LocalPathOverride.create(
-                directories.getEmbeddedBinariesRoot().getChild("embedded_tools").getPathString()),
-            // @local_config_platform is currently generated by the native repo rule
-            // local_config_platform
-            // It has to be a special repo for now because:
-            //   - It's embedded in local_config_platform.WORKSPACE and depended on by many
-            // toolchains.
-            //   - The canonical name "local_config_platform" is hardcoded in Bazel code.
-            //     See {@link PlatformOptions}
-            "local_config_platform",
-            new NonRegistryOverride() {
-              @Override
-              public RepoSpec getRepoSpec(RepositoryName repoName) {
-                return RepoSpec.builder()
-                    .setRuleClassName("local_config_platform")
-                    .setAttributes(
-                        AttributeValues.create(ImmutableMap.of("name", repoName.getName())))
-                    .build();
-              }
-
-              @Override
-              public ResolutionReason getResolutionReason() {
-                // NOTE: It is not exactly a LOCAL_PATH_OVERRIDE, but there is no inspection
-                // ResolutionReason for builtin modules
-                return ResolutionReason.LOCAL_PATH_OVERRIDE;
-              }
-            });
+    if (builtinModules == null) {
+      builtinModules =
+          ImmutableMap.of(
+              // @bazel_tools is a special repo that we pull from the extracted install dir.
+              "bazel_tools",
+              LocalPathOverride.create(
+                  directories.getEmbeddedBinariesRoot().getChild("embedded_tools").getPathString()),
+              // @local_config_platform is currently generated by the native repo rule
+              // local_config_platform
+              // It has to be a special repo for now because:
+              //   - It's embedded in local_config_platform.WORKSPACE and depended on by many
+              // toolchains.
+              //   - The canonical name "local_config_platform" is hardcoded in Bazel code.
+              //     See {@link PlatformOptions}
+              "local_config_platform",
+              new NonRegistryOverride() {
+                @Override
+                public RepoSpec getRepoSpec(RepositoryName repoName) {
+                  return RepoSpec.builder()
+                      .setRuleClassName("local_config_platform")
+                      .setAttributes(
+                          AttributeValues.create(ImmutableMap.of("name", repoName.getName())))
+                      .build();
+                }
+
+                @Override
+                public ResolutionReason getResolutionReason() {
+                  // NOTE: It is not exactly a LOCAL_PATH_OVERRIDE, but there is no inspection
+                  // ResolutionReason for builtin modules
+                  return ResolutionReason.LOCAL_PATH_OVERRIDE;
+                }
+              });
+    }
 
     builder
         .addSkyFunction(SkyFunctions.REPOSITORY_DIRECTORY, repositoryDelegatorFunction)

src/main/java/com/google/devtools/build/lib/bazel/bzlmod/BazelDepGraphValue.java

@@ -15,6 +15,8 @@
 
 package com.google.devtools.build.lib.bazel.bzlmod;
 
+import static com.google.common.collect.ImmutableMap.toImmutableMap;
+
 import com.google.auto.value.AutoValue;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
@@ -49,6 +51,32 @@ public static BazelDepGraphValue create(
         extensionUniqueNames);
   }
 
+  public static BazelDepGraphValue createEmptyDepGraph() {
+    Module root =
+        Module.builder()
+            .setName("")
+            .setVersion(Version.EMPTY)
+            .setRepoName("")
+            .setKey(ModuleKey.ROOT)
+            .setExtensionUsages(ImmutableList.of())
+            .setExecutionPlatformsToRegister(ImmutableList.of())
+            .setToolchainsToRegister(ImmutableList.of())
+            .build();
+
+    ImmutableMap<ModuleKey, Module> emptyDepGraph = ImmutableMap.of(ModuleKey.ROOT, root);
+
+    ImmutableMap<RepositoryName, ModuleKey> canonicalRepoNameLookup =
+        emptyDepGraph.keySet().stream()
+            .collect(toImmutableMap(ModuleKey::getCanonicalRepoName, key -> key));
+
+    return BazelDepGraphValue.create(
+        emptyDepGraph,
+        canonicalRepoNameLookup,
+        ImmutableList.of(),
+        ImmutableTable.of(),
+        ImmutableMap.of());
+  }
+
   /**
    * The post-selection dep graph. Must have BFS iteration order, starting from the root module. For
    * any KEY in the returned map, it's guaranteed that {@code depGraph[KEY].getKey() == KEY}.

src/main/java/com/google/devtools/build/lib/packages/semantics/BuildLanguageOptions.java

@@ -197,7 +197,7 @@ public final class BuildLanguageOptions extends OptionsBase {
   @Option(
       name = "enable_bzlmod",
       oldName = "experimental_enable_bzlmod",
-      defaultValue = "false",
+      defaultValue = "true",
       documentationCategory = OptionDocumentationCategory.STARLARK_SEMANTICS,
       effectTags = OptionEffectTag.LOADING_AND_ANALYSIS,
       help =
@@ -821,7 +821,7 @@ public StarlarkSemantics toStarlarkSemantics() {
   public static final String EXPERIMENTAL_ENABLE_ANDROID_MIGRATION_APIS =
       "-experimental_enable_android_migration_apis";
   public static final String EXPERIMENTAL_ENABLE_SCL_DIALECT = "-experimental_enable_scl_dialect";
-  public static final String ENABLE_BZLMOD = "-enable_bzlmod";
+  public static final String ENABLE_BZLMOD = "+enable_bzlmod";
   public static final String EXPERIMENTAL_ISOLATED_EXTENSION_USAGES =
       "-experimental_isolated_extension_usages";
   public static final String INCOMPATIBLE_EXISTING_RULES_IMMUTABLE_VIEW =

src/main/java/com/google/devtools/build/lib/skyframe/RepositoryMappingFunction.java

@@ -60,6 +60,10 @@ public SkyValue compute(SkyKey skyKey, Environment env)
 
     if (enableBzlmod) {
       if (StarlarkBuiltinsValue.isBuiltinsRepo(repositoryName)) {
+        // If tools repo is not set, repo mapping for @_builtins should be always fallback.
+        if (ruleClassProvider.getToolsRepository() == null) {
+          return RepositoryMappingValue.createForWorkspaceRepo(RepositoryMapping.ALWAYS_FALLBACK);
+        }
         // Builtins .bzl files should use the repo mapping of @bazel_tools, to get access to repos
         // such as @platforms.
         RepositoryMappingValue bazelToolsMapping =

src/main/java/com/google/devtools/build/lib/skyframe/SkyframeExecutor.java

@@ -99,6 +99,7 @@
 import com.google.devtools.build.lib.analysis.config.InvalidConfigurationException;
 import com.google.devtools.build.lib.analysis.constraints.RuleContextConstraintSemantics;
 import com.google.devtools.build.lib.analysis.producers.ConfiguredTargetAndDataProducer;
+import com.google.devtools.build.lib.bazel.bzlmod.BazelDepGraphValue;
 import com.google.devtools.build.lib.bazel.bzlmod.BzlmodRepoRuleValue;
 import com.google.devtools.build.lib.bazel.repository.RepositoryOptions;
 import com.google.devtools.build.lib.bugreport.BugReporter;
@@ -672,6 +673,16 @@ private ImmutableMap<SkyFunctionName, SkyFunction> skyFunctions() {
               throw new IllegalStateException("supposed to be unused");
             });
     map.put(SkyFunctions.EXTERNAL_PACKAGE, new ExternalPackageFunction(externalPackageHelper));
+    // Inject an empty default BAZEL_DEP_GRAPH SkyFunction for Blaze, it'll be overridden by
+    // BazelRepositoryModule in Bazel
+    map.put(
+        SkyFunctions.BAZEL_DEP_GRAPH,
+        new SkyFunction() {
+          @Override
+          public SkyValue compute(SkyKey skyKey, Environment env) {
+            return BazelDepGraphValue.createEmptyDepGraph();
+          }
+        });
     map.put(
         BzlmodRepoRuleValue.BZLMOD_REPO_RULE,
         new BzlmodRepoRuleFunction(ruleClassProvider, directories));

src/main/java/com/google/devtools/build/lib/skyframe/packages/BUILD

@@ -80,6 +80,9 @@ java_library(
         ":AbstractPackageLoader",
         "//src/main/java/com/google/devtools/build/lib/analysis:analysis_cluster",
         "//src/main/java/com/google/devtools/build/lib/bazel:repository_module",
+        "//src/main/java/com/google/devtools/build/lib/bazel/bzlmod:registry",
+        "//src/main/java/com/google/devtools/build/lib/bazel/bzlmod:resolution_impl",
+        "//src/main/java/com/google/devtools/build/lib/bazel/repository:repository_options",
         "//src/main/java/com/google/devtools/build/lib/bazel/repository/cache",
         "//src/main/java/com/google/devtools/build/lib/bazel/repository/downloader",
         "//src/main/java/com/google/devtools/build/lib/bazel/repository/starlark",

src/main/java/com/google/devtools/build/lib/skyframe/packages/BazelPackageLoader.java

@@ -18,6 +18,14 @@
 import com.google.common.collect.ImmutableMap;
 import com.google.devtools.build.lib.analysis.ConfiguredRuleClassProvider;
 import com.google.devtools.build.lib.bazel.BazelRepositoryModule;
+import com.google.devtools.build.lib.bazel.bzlmod.BazelDepGraphFunction;
+import com.google.devtools.build.lib.bazel.bzlmod.BazelLockFileFunction;
+import com.google.devtools.build.lib.bazel.bzlmod.BazelModuleResolutionFunction;
+import com.google.devtools.build.lib.bazel.bzlmod.ModuleFileFunction;
+import com.google.devtools.build.lib.bazel.bzlmod.RegistryFactory;
+import com.google.devtools.build.lib.bazel.bzlmod.RegistryFactoryImpl;
+import com.google.devtools.build.lib.bazel.bzlmod.YankedVersionsUtil;
+import com.google.devtools.build.lib.bazel.repository.RepositoryOptions;
 import com.google.devtools.build.lib.bazel.repository.cache.RepositoryCache;
 import com.google.devtools.build.lib.bazel.repository.downloader.DownloadManager;
 import com.google.devtools.build.lib.bazel.repository.downloader.HttpDownloader;
@@ -98,7 +106,23 @@ private Builder(Root workspaceDir, Path installBase, Path outputBase, AtomicBool
               RepositoryDelegatorFunction.RESOLVED_FILE_INSTEAD_OF_WORKSPACE, Optional.empty()),
           PrecomputedValue.injected(
               RepositoryDelegatorFunction.DEPENDENCY_FOR_UNCONDITIONAL_FETCHING,
-              RepositoryDelegatorFunction.DONT_FETCH_UNCONDITIONALLY));
+              RepositoryDelegatorFunction.DONT_FETCH_UNCONDITIONALLY),
+          PrecomputedValue.injected(ModuleFileFunction.MODULE_OVERRIDES, ImmutableMap.of()),
+          PrecomputedValue.injected(
+              RepositoryDelegatorFunction.DEPENDENCY_FOR_UNCONDITIONAL_CONFIGURING,
+              RepositoryDelegatorFunction.DONT_FETCH_UNCONDITIONALLY),
+          PrecomputedValue.injected(ModuleFileFunction.REGISTRIES, ImmutableList.of()),
+          PrecomputedValue.injected(ModuleFileFunction.IGNORE_DEV_DEPS, false),
+          PrecomputedValue.injected(
+              BazelModuleResolutionFunction.CHECK_DIRECT_DEPENDENCIES,
+              RepositoryOptions.CheckDirectDepsMode.OFF),
+          PrecomputedValue.injected(
+              BazelModuleResolutionFunction.BAZEL_COMPATIBILITY_MODE,
+              RepositoryOptions.BazelCompatibilityMode.OFF),
+          PrecomputedValue.injected(
+              BazelLockFileFunction.LOCKFILE_MODE, RepositoryOptions.LockfileMode.OFF),
+          PrecomputedValue.injected(
+              YankedVersionsUtil.ALLOWED_YANKED_VERSIONS, ImmutableList.of()));
     }
 
     @Override
@@ -107,6 +131,19 @@ public BazelPackageLoader buildImpl() {
       RepositoryCache repositoryCache = new RepositoryCache();
       HttpDownloader httpDownloader = new HttpDownloader();
       DownloadManager downloadManager = new DownloadManager(repositoryCache, httpDownloader);
+      RegistryFactory registryFactory =
+          new RegistryFactoryImpl(
+              directories.getWorkspace(), downloadManager, Suppliers.ofInstance(ImmutableMap.of()));
+
+      // Allow tests to override SkyFunctions.MODULE_FILE to use fake registry
+      if (!this.extraSkyFunctions.containsKey(SkyFunctions.MODULE_FILE)) {
+        addExtraSkyFunctions(
+            ImmutableMap.of(
+                SkyFunctions.MODULE_FILE,
+                new ModuleFileFunction(
+                    registryFactory, directories.getWorkspace(), ImmutableMap.of())));
+      }
+
       addExtraSkyFunctions(
           ImmutableMap.<SkyFunctionName, SkyFunction>builder()
               .put(
@@ -129,7 +166,9 @@ public BazelPackageLoader buildImpl() {
                       ImmutableMap::of,
                       directories,
                       EXTERNAL_PACKAGE_HELPER))
-              .build());
+              .put(SkyFunctions.BAZEL_DEP_GRAPH, new BazelDepGraphFunction())
+              .put(SkyFunctions.BAZEL_MODULE_RESOLUTION, new BazelModuleResolutionFunction())
+              .buildOrThrow());
 
       return new BazelPackageLoader(this);
     }

src/main/starlark/tests/builtins_bzl/cc_builtin_tests.sh

@@ -52,6 +52,7 @@ msys*)
 esac
 
 # TODO: cc_shared_library doesn't work well with Bzlmod.
+# https://github.com/bazelbuild/bazel/issues/19822
 disable_bzlmod
 
 function test_starlark_cc() {

src/test/java/com/google/devtools/build/lib/analysis/mock/BazelAnalysisMock.java

@@ -139,6 +139,7 @@ public void setupMockClient(MockToolsConfig config, List<String> workspaceConten
     config.create("protobuf_workspace/WORKSPACE");
     config.create("protobuf_workspace/MODULE.bazel", "module(name='com_google_protobuf')");
     config.overwrite("WORKSPACE", workspaceContents.toArray(new String[0]));
+    config.overwrite("MODULE.bazel");
     /* The rest of platforms is initialized in {@link MockPlatformSupport}. */
     config.create("platforms_workspace/WORKSPACE", "workspace(name = 'platforms')");
     config.create("platforms_workspace/MODULE.bazel", "module(name = 'platforms')");

src/test/java/com/google/devtools/build/lib/analysis/util/AnalysisMock.java

@@ -27,6 +27,10 @@
 import com.google.devtools.build.lib.bazel.bzlmod.RepoSpecFunction;
 import com.google.devtools.build.lib.bazel.bzlmod.SingleExtensionEvalFunction;
 import com.google.devtools.build.lib.bazel.bzlmod.SingleExtensionUsagesFunction;
+import com.google.devtools.build.lib.bazel.bzlmod.YankedVersionsUtil;
+import com.google.devtools.build.lib.bazel.repository.RepositoryOptions.BazelCompatibilityMode;
+import com.google.devtools.build.lib.bazel.repository.RepositoryOptions.CheckDirectDepsMode;
+import com.google.devtools.build.lib.bazel.repository.RepositoryOptions.LockfileMode;
 import com.google.devtools.build.lib.bazel.repository.downloader.DownloadManager;
 import com.google.devtools.build.lib.bazel.repository.starlark.StarlarkRepositoryFunction;
 import com.google.devtools.build.lib.bazel.rules.android.AndroidNdkRepositoryFunction;
@@ -43,6 +47,7 @@
 import com.google.devtools.build.lib.rules.repository.RepositoryFunction;
 import com.google.devtools.build.lib.skyframe.BazelSkyframeExecutorConstants;
 import com.google.devtools.build.lib.skyframe.ClientEnvironmentFunction;
+import com.google.devtools.build.lib.skyframe.PrecomputedValue;
 import com.google.devtools.build.lib.skyframe.SkyFunctions;
 import com.google.devtools.build.lib.skyframe.packages.PackageFactoryBuilderWithSkyframeForTesting;
 import com.google.devtools.build.lib.testutil.TestConstants;
@@ -52,6 +57,7 @@
 import java.io.IOException;
 import java.lang.reflect.Field;
 import java.util.List;
+import java.util.Optional;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicReference;
 import org.mockito.Mockito;
@@ -69,6 +75,16 @@ public static AnalysisMock get() {
     }
   }
 
+  public static AnalysisMock getAnalysisMockWithoutBuiltinModules() {
+    return new AnalysisMock.Delegate(AnalysisMock.get()) {
+      @Override
+      public ImmutableMap<String, NonRegistryOverride> getBuiltinModules(
+          BlazeDirectories directories) {
+        return ImmutableMap.of();
+      }
+    };
+  }
+
   @Override
   public String getProductName() {
     return TestConstants.PRODUCT_NAME;
@@ -82,15 +98,16 @@ public ImmutableList<String> getEmbeddedTools() {
   public PackageFactoryBuilderWithSkyframeForTesting getPackageFactoryBuilderForTesting(
       BlazeDirectories directories) {
     return super.getPackageFactoryBuilderForTesting(directories)
-        .setExtraSkyFunctions(getSkyFunctions(directories));
+        .setExtraSkyFunctions(getSkyFunctions(directories))
+        .setExtraPrecomputeValues(getPrecomputedValues());
   }
 
   /**
    * This is called from test setup to create the mock directory layout needed to create the
    * configuration.
    */
   public void setupMockClient(MockToolsConfig mockToolsConfig) throws IOException {
-    List<String> workspaceContents = getWorkspaceContents(mockToolsConfig);
+    ImmutableList<String> workspaceContents = getWorkspaceContents(mockToolsConfig);
     setupMockClient(mockToolsConfig, workspaceContents);
   }
 
@@ -165,6 +182,29 @@ public ImmutableMap<SkyFunctionName, SkyFunction> getSkyFunctions(BlazeDirectori
         .buildOrThrow();
   }
 
+  public ImmutableList<PrecomputedValue.Injected> getPrecomputedValues() {
+    // PrecomputedValues required by SkyFunctions in getSkyFunctions()
+    return ImmutableList.of(
+        PrecomputedValue.injected(PrecomputedValue.REPO_ENV, ImmutableMap.of()),
+        PrecomputedValue.injected(ModuleFileFunction.MODULE_OVERRIDES, ImmutableMap.of()),
+        PrecomputedValue.injected(
+            RepositoryDelegatorFunction.REPOSITORY_OVERRIDES, ImmutableMap.of()),
+        PrecomputedValue.injected(
+            RepositoryDelegatorFunction.RESOLVED_FILE_INSTEAD_OF_WORKSPACE, Optional.empty()),
+        PrecomputedValue.injected(
+            RepositoryDelegatorFunction.DEPENDENCY_FOR_UNCONDITIONAL_FETCHING,
+            RepositoryDelegatorFunction.DONT_FETCH_UNCONDITIONALLY),
+        PrecomputedValue.injected(ModuleFileFunction.REGISTRIES, ImmutableList.of()),
+        PrecomputedValue.injected(ModuleFileFunction.IGNORE_DEV_DEPS, false),
+        PrecomputedValue.injected(ModuleFileFunction.MODULE_OVERRIDES, ImmutableMap.of()),
+        PrecomputedValue.injected(YankedVersionsUtil.ALLOWED_YANKED_VERSIONS, ImmutableList.of()),
+        PrecomputedValue.injected(
+            BazelModuleResolutionFunction.CHECK_DIRECT_DEPENDENCIES, CheckDirectDepsMode.WARNING),
+        PrecomputedValue.injected(
+            BazelModuleResolutionFunction.BAZEL_COMPATIBILITY_MODE, BazelCompatibilityMode.ERROR),
+        PrecomputedValue.injected(BazelLockFileFunction.LOCKFILE_MODE, LockfileMode.UPDATE));
+  }
+
   // Allow subclasses to add extra repository functions.
   public abstract void addExtraRepositoryFunctions(
       ImmutableMap.Builder<String, RepositoryFunction> repositoryHandlers);

src/test/java/com/google/devtools/build/lib/analysis/util/AnalysisTestCase.java

@@ -351,6 +351,8 @@ public void useConfiguration(String... args) throws Exception {
     }
     if (defaultFlags().contains(Flag.ENABLE_BZLMOD)) {
       optionsParser.parse("--enable_bzlmod");
+    } else {
+      optionsParser.parse("--noenable_bzlmod");
     }
     optionsParser.parse(args);