Expose ProtoLangToolchainInfo to builtins.

This necessitated changing ProtoLangToolchainProvider from native to Starlark type.

PiperOrigin-RevId: 437751442

Author: comius

src/main/java/com/google/devtools/build/lib/bazel/rules/java/proto/BazelJavaLiteProtoLibraryRule.java

@@ -20,11 +20,9 @@
 import static com.google.devtools.build.lib.packages.BuildType.LABEL_LIST;
 import static com.google.devtools.build.lib.rules.java.proto.JavaLiteProtoAspect.getProtoToolchainLabel;
 
-import com.google.common.collect.ImmutableList;
 import com.google.devtools.build.lib.analysis.BaseRuleClasses;
 import com.google.devtools.build.lib.analysis.RuleDefinition;
 import com.google.devtools.build.lib.analysis.RuleDefinitionEnvironment;
-import com.google.devtools.build.lib.analysis.TransitiveInfoProvider;
 import com.google.devtools.build.lib.packages.RuleClass;
 import com.google.devtools.build.lib.packages.StarlarkProviderIdentifier;
 import com.google.devtools.build.lib.rules.java.JavaConfiguration;
@@ -58,9 +56,7 @@ public RuleClass build(RuleClass.Builder builder, RuleDefinitionEnvironment envi
                 .aspect(javaProtoAspect))
         .add(
             attr(JavaProtoAspectCommon.LITE_PROTO_TOOLCHAIN_ATTR, LABEL)
-                .mandatoryBuiltinProviders(
-                    ImmutableList.<Class<? extends TransitiveInfoProvider>>of(
-                        ProtoLangToolchainProvider.class))
+                .mandatoryProviders(ProtoLangToolchainProvider.PROVIDER.id())
                 .value(getProtoToolchainLabel(DEFAULT_PROTO_TOOLCHAIN_LABEL)))
         .advertiseStarlarkProvider(StarlarkProviderIdentifier.forKey(JavaInfo.PROVIDER.getKey()))
         .build();

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

@@ -178,11 +178,11 @@ public AspectDefinition getDefinition(AspectParameters params) {
             // For android_sdk rules, where we just want to get at aidl runtime deps.
             .requireStarlarkProviders(forKey(AndroidSdkProvider.PROVIDER.getKey()))
             .requireStarlarkProviders(forKey(ProtoInfo.PROVIDER.getKey()))
-            .requireProviderSets(
+            .requireStarlarkProviderSets(
                 ImmutableList.of(
                     // For proto_lang_toolchain rules, where we just want to get at their runtime
                     // deps.
-                    ImmutableSet.of(ProtoLangToolchainProvider.class)))
+                    ImmutableSet.of(ProtoLangToolchainProvider.PROVIDER.id())))
             .addToolchainTypes(
                 ToolchainTypeRequirement.create(
                     Label.parseAbsoluteUnchecked(toolsRepository + sdkToolchainLabel)))

src/main/java/com/google/devtools/build/lib/rules/cpp/proto/CcProtoAspect.java

@@ -133,7 +133,7 @@ public AspectDefinition getDefinition(AspectParameters aspectParameters) {
             .useToolchainTransition(true)
             .add(
                 attr(PROTO_TOOLCHAIN_ATTR, LABEL)
-                    .mandatoryBuiltinProviders(ImmutableList.of(ProtoLangToolchainProvider.class))
+                    .mandatoryProviders(ProtoLangToolchainProvider.PROVIDER.id())
                     .value(PROTO_TOOLCHAIN_LABEL))
             .add(
                 attr(CcToolchain.CC_TOOLCHAIN_DEFAULT_ATTRIBUTE_NAME, LABEL)
@@ -470,7 +470,7 @@ private void createProtoCompileAction(Collection<Artifact> outputs)
     }
 
     private ProtoLangToolchainProvider getProtoToolchainProvider() {
-      return ruleContext.getPrerequisite(PROTO_TOOLCHAIN_ATTR, ProtoLangToolchainProvider.class);
+      return ruleContext.getPrerequisite(PROTO_TOOLCHAIN_ATTR, ProtoLangToolchainProvider.PROVIDER);
     }
 
     public void addProviders(ConfiguredAspect.Builder builder) {

src/main/java/com/google/devtools/build/lib/rules/java/proto/JavaLiteProtoAspect.java

@@ -27,7 +27,6 @@
 import com.google.devtools.build.lib.analysis.PlatformConfiguration;
 import com.google.devtools.build.lib.analysis.RuleContext;
 import com.google.devtools.build.lib.analysis.RuleDefinitionEnvironment;
-import com.google.devtools.build.lib.analysis.TransitiveInfoProvider;
 import com.google.devtools.build.lib.analysis.platform.ToolchainInfo;
 import com.google.devtools.build.lib.cmdline.Label;
 import com.google.devtools.build.lib.cmdline.RepositoryName;
@@ -117,9 +116,7 @@ public AspectDefinition getDefinition(AspectParameters aspectParameters) {
                 ImmutableList.of(StarlarkProviderIdentifier.forKey(JavaInfo.PROVIDER.getKey())))
             .add(
                 attr(JavaProtoAspectCommon.LITE_PROTO_TOOLCHAIN_ATTR, LABEL)
-                    .mandatoryBuiltinProviders(
-                        ImmutableList.<Class<? extends TransitiveInfoProvider>>of(
-                            ProtoLangToolchainProvider.class))
+                    .mandatoryProviders(ProtoLangToolchainProvider.PROVIDER.id())
                     .value(getProtoToolchainLabel(defaultProtoToolchainLabel)))
             .add(
                 attr(JavaRuleClasses.JAVA_TOOLCHAIN_ATTRIBUTE_NAME, LABEL)

src/main/java/com/google/devtools/build/lib/rules/java/proto/JavaProtoAspectCommon.java

@@ -159,14 +159,15 @@ public ImmutableList<TransitiveInfoCollection> getProtoRuntimeDeps() {
   /** Returns the toolchain that specifies how to generate code from {@code .proto} files. */
   public ProtoLangToolchainProvider getProtoToolchainProvider() {
     return checkNotNull(
-        ruleContext.getPrerequisite(protoToolchainAttr, ProtoLangToolchainProvider.class));
+        ruleContext.getPrerequisite(protoToolchainAttr, ProtoLangToolchainProvider.PROVIDER));
   }
 
   /**
    * Returns the toolchain that specifies how to generate Java-lite code from {@code .proto} files.
    */
   static ProtoLangToolchainProvider getLiteProtoToolchainProvider(RuleContext ruleContext) {
-    return ruleContext.getPrerequisite(LITE_PROTO_TOOLCHAIN_ATTR, ProtoLangToolchainProvider.class);
+    return ruleContext.getPrerequisite(
+        LITE_PROTO_TOOLCHAIN_ATTR, ProtoLangToolchainProvider.PROVIDER);
   }
 
   /**

src/main/java/com/google/devtools/build/lib/rules/java/proto/JavaProtoStarlarkCommon.java

@@ -96,6 +96,6 @@ private static ProtoLangToolchainProvider getProtoToolchainProvider(
       StarlarkRuleContext starlarkRuleContext, String protoToolchainAttr) throws EvalException {
     ConfiguredTarget javaliteToolchain =
         (ConfiguredTarget) checkNotNull(starlarkRuleContext.getAttr().getValue(protoToolchainAttr));
-    return checkNotNull(javaliteToolchain.getProvider(ProtoLangToolchainProvider.class));
+    return checkNotNull(javaliteToolchain.get(ProtoLangToolchainProvider.PROVIDER));
   }
 }

src/main/java/com/google/devtools/build/lib/rules/objc/J2ObjcAspect.java

@@ -392,7 +392,8 @@ private ConfiguredAspect proto(ConfiguredTarget base, RuleContext ruleContext)
     ImmutableList<Artifact> protoSources = protoInfo.getDirectProtoSources();
 
     ProtoLangToolchainProvider protoToolchain =
-        ruleContext.getPrerequisite(J2OBJC_PROTO_TOOLCHAIN_ATTR, ProtoLangToolchainProvider.class);
+        ruleContext.getPrerequisite(
+            J2OBJC_PROTO_TOOLCHAIN_ATTR, ProtoLangToolchainProvider.PROVIDER);
     // Avoid pulling in any generated files from forbidden protos.
     ProtoSourceFileExcludeList protoExcludeList =
         new ProtoSourceFileExcludeList(ruleContext, protoToolchain.forbiddenProtos());

src/main/java/com/google/devtools/build/lib/rules/proto/ProtoLangToolchain.java

@@ -49,7 +49,7 @@ public ConfiguredTarget create(RuleContext ruleContext)
     flag = flag.replace("$(OUT)", "%s");
 
     return new RuleConfiguredTargetBuilder(ruleContext)
-        .addProvider(
+        .addStarlarkDeclaredProvider(
             ProtoLangToolchainProvider.create(
                 flag,
                 ruleContext.attributes().get("plugin_format_flag", Type.STRING),

src/main/java/com/google/devtools/build/lib/rules/proto/ProtoLangToolchainProvider.java

@@ -19,10 +19,12 @@
 import com.google.devtools.build.lib.actions.Artifact;
 import com.google.devtools.build.lib.analysis.FilesToRunProvider;
 import com.google.devtools.build.lib.analysis.TransitiveInfoCollection;
-import com.google.devtools.build.lib.analysis.TransitiveInfoProvider;
 import com.google.devtools.build.lib.collect.nestedset.NestedSet;
 import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
+import com.google.devtools.build.lib.packages.BuiltinProvider;
+import com.google.devtools.build.lib.packages.NativeInfo;
 import javax.annotation.Nullable;
+import net.starlark.java.annot.StarlarkBuiltin;
 import net.starlark.java.annot.StarlarkMethod;
 import net.starlark.java.eval.StarlarkList;
 
@@ -33,7 +35,23 @@
  * rules.
  */
 @AutoValue
-public abstract class ProtoLangToolchainProvider implements TransitiveInfoProvider {
+public abstract class ProtoLangToolchainProvider extends NativeInfo {
+  public static final String PROVIDER_NAME = "ProtoLangToolchainInfo";
+  public static final Provider PROVIDER = new Provider();
+
+  /** Provider class for {@link ProtoLangToolchainProvider} objects. */
+  @StarlarkBuiltin(name = "Provider", documented = false, doc = "")
+  public static class Provider extends BuiltinProvider<ProtoLangToolchainProvider> {
+    public Provider() {
+      super(PROVIDER_NAME, ProtoLangToolchainProvider.class);
+    }
+  }
+
+  @Override
+  public Provider getProvider() {
+    return PROVIDER;
+  }
+
   @StarlarkMethod(
       name = "out_replacement_format_flag",
       doc = "Format string used when passing output to the plugin used by proto compiler.",

src/main/java/com/google/devtools/build/lib/rules/proto/ProtoLangToolchainRule.java

@@ -106,7 +106,7 @@ public RuleClass build(RuleClass.Builder builder, RuleDefinitionEnvironment envi
                 .exec()
                 .value(PROTO_COMPILER))
         .requiresConfigurationFragments(ProtoConfiguration.class)
-        .advertiseProvider(ProtoLangToolchainProvider.class)
+        .advertiseStarlarkProvider(ProtoLangToolchainProvider.PROVIDER.id())
         .removeAttribute("data")
         .removeAttribute("deps")
         .build();

src/test/java/com/google/devtools/build/lib/rules/proto/ProtoLangToolchainTest.java

@@ -94,7 +94,7 @@ public void protoToolchain() throws Exception {
     update(ImmutableList.of("//foo:toolchain"), false, 1, true, new EventBus());
 
     validateProtoLangToolchain(
-        getConfiguredTarget("//foo:toolchain").getProvider(ProtoLangToolchainProvider.class));
+        getConfiguredTarget("//foo:toolchain").get(ProtoLangToolchainProvider.PROVIDER));
   }
 
   @Test
@@ -125,7 +125,7 @@ public void protoToolchainBlacklistProtoLibraries() throws Exception {
     update(ImmutableList.of("//foo:toolchain"), false, 1, true, new EventBus());
 
     validateProtoLangToolchain(
-        getConfiguredTarget("//foo:toolchain").getProvider(ProtoLangToolchainProvider.class));
+        getConfiguredTarget("//foo:toolchain").get(ProtoLangToolchainProvider.PROVIDER));
   }
 
   @Test
@@ -156,7 +156,7 @@ public void protoToolchainBlacklistTransitiveProtos() throws Exception {
     update(ImmutableList.of("//foo:toolchain"), false, 1, true, new EventBus());
 
     validateProtoLangToolchain(
-        getConfiguredTarget("//foo:toolchain").getProvider(ProtoLangToolchainProvider.class));
+        getConfiguredTarget("//foo:toolchain").get(ProtoLangToolchainProvider.PROVIDER));
   }
 
   @Test
@@ -172,7 +172,7 @@ public void optionalFieldsAreEmpty() throws Exception {
     update(ImmutableList.of("//foo:toolchain"), false, 1, true, new EventBus());
 
     ProtoLangToolchainProvider toolchain =
-        getConfiguredTarget("//foo:toolchain").getProvider(ProtoLangToolchainProvider.class);
+        getConfiguredTarget("//foo:toolchain").get(ProtoLangToolchainProvider.PROVIDER);
 
     assertThat(toolchain.pluginExecutable()).isNull();
     assertThat(toolchain.runtime()).isNull();