Setup Go Server Codegen plugin

codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/CodegenVisitor.java

@@ -32,6 +32,7 @@
 import software.amazon.smithy.codegen.core.Symbol;
 import software.amazon.smithy.codegen.core.SymbolDependency;
 import software.amazon.smithy.codegen.core.SymbolProvider;
+import software.amazon.smithy.go.codegen.GoSettings.ArtifactType;
 import software.amazon.smithy.go.codegen.integration.GoIntegration;
 import software.amazon.smithy.go.codegen.integration.ProtocolGenerator;
 import software.amazon.smithy.go.codegen.integration.RuntimeClientPlugin;
@@ -51,10 +52,12 @@
 import software.amazon.smithy.model.traits.EnumTrait;
 import software.amazon.smithy.model.transform.ModelTransformer;
 import software.amazon.smithy.utils.OptionalUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Orchestrates Go client generation.
  */
+@SmithyInternalApi
 final class CodegenVisitor extends ShapeVisitor.Default<Void> {
 
     private static final Logger LOGGER = Logger.getLogger(CodegenVisitor.class.getName());
@@ -79,8 +82,10 @@ final class CodegenVisitor extends ShapeVisitor.Default<Void> {
         LOGGER.info("Attempting to discover GoIntegration from the classpath...");
         ServiceLoader.load(GoIntegration.class, loader)
                 .forEach(integration -> {
-                    LOGGER.info(() -> "Adding GoIntegration: " + integration.getClass().getName());
-                    integrations.add(integration);
+                    if (integration.getArtifactType().equals(ArtifactType.CLIENT)) {
+                        LOGGER.info(() -> "Adding GoIntegration: " + integration.getClass().getName());
+                        integrations.add(integration);
+                    }
                 });
         integrations.sort(Comparator.comparingInt(GoIntegration::getOrder));
 

codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/EnumGenerator.java

@@ -24,19 +24,21 @@
 import software.amazon.smithy.model.shapes.StringShape;
 import software.amazon.smithy.model.traits.EnumDefinition;
 import software.amazon.smithy.model.traits.EnumTrait;
+import software.amazon.smithy.utils.SmithyInternalApi;
 import software.amazon.smithy.utils.StringUtils;
 
 /**
  * Renders enums and their constants.
  */
-final class EnumGenerator implements Runnable {
+@SmithyInternalApi
+public final class EnumGenerator implements Runnable {
     private static final Logger LOGGER = Logger.getLogger(EnumGenerator.class.getName());
 
     private final SymbolProvider symbolProvider;
     private final GoWriter writer;
     private final StringShape shape;
 
-    EnumGenerator(SymbolProvider symbolProvider, GoWriter writer, StringShape shape) {
+    public EnumGenerator(SymbolProvider symbolProvider, GoWriter writer, StringShape shape) {
         this.symbolProvider = symbolProvider;
         this.writer = writer;
         this.shape = shape;

codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/GoDelegator.java

@@ -21,15 +21,17 @@
 import software.amazon.smithy.codegen.core.SymbolProvider;
 import software.amazon.smithy.codegen.core.SymbolReference;
 import software.amazon.smithy.model.shapes.Shape;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Manages writers for Go files.Based off of GoWriterDelegator adding support
  * for getting shape specific GoWriters.
  */
+@SmithyInternalApi
 public final class GoDelegator extends GoWriterDelegator {
     private final SymbolProvider symbolProvider;
 
-    GoDelegator(FileManifest fileManifest, SymbolProvider symbolProvider) {
+    public GoDelegator(FileManifest fileManifest, SymbolProvider symbolProvider) {
         super(fileManifest);
 
         this.symbolProvider = symbolProvider;

codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/GoModGenerator.java

@@ -22,19 +22,21 @@
 import java.util.logging.Logger;
 import software.amazon.smithy.build.FileManifest;
 import software.amazon.smithy.codegen.core.CodegenException;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Generates a go.mod file for the project.
  *
  * <p>See here for more information on the format: https://github.com/golang/go/wiki/Modules#gomod
  */
-final class GoModGenerator {
+@SmithyInternalApi
+public final class GoModGenerator {
 
     private static final Logger LOGGER = Logger.getLogger(GoModGenerator.class.getName());
 
     private GoModGenerator() {}
 
-    static void writeGoMod(
+    public static void writeGoMod(
             GoSettings settings,
             FileManifest manifest,
             GoModuleInfo goModuleInfo

codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/GoSettings.java

@@ -25,10 +25,12 @@
 import software.amazon.smithy.model.node.ObjectNode;
 import software.amazon.smithy.model.shapes.ServiceShape;
 import software.amazon.smithy.model.shapes.ShapeId;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Settings used by {@link GoCodegenPlugin}.
  */
+@SmithyInternalApi
 public final class GoSettings {
 
     private static final String SERVICE = "service";
@@ -45,6 +47,13 @@ public final class GoSettings {
     private Boolean generateGoMod = false;
     private String goDirective = GoModuleInfo.DEFAULT_GO_DIRECTIVE;
     private ShapeId protocol;
+    private ArtifactType artifactType;
+
+    @SmithyInternalApi
+    public enum ArtifactType {
+        CLIENT,
+        SERVER;
+    }
 
     /**
      * Create a settings object from a configuration object node.
@@ -53,10 +62,15 @@ public final class GoSettings {
      * @return Returns the extracted settings.
      */
     public static GoSettings from(ObjectNode config) {
+        return from(config, ArtifactType.CLIENT);
+    }
+
+    @SmithyInternalApi
+    public static GoSettings from(ObjectNode config, ArtifactType artifactType) {
         GoSettings settings = new GoSettings();
         config.warnIfAdditionalProperties(
             Arrays.asList(SERVICE, MODULE_NAME, MODULE_DESCRIPTION, MODULE_VERSION, GENERATE_GO_MOD, GO_DIRECTIVE));
-
+        settings.setArtifactType(artifactType);
         settings.setService(config.expectStringMember(SERVICE).expectShapeId());
         settings.setModuleName(config.expectStringMember(MODULE_NAME).getValue());
         settings.setModuleDescription(config.getStringMemberOrDefault(
@@ -241,4 +255,14 @@ public ShapeId resolveServiceProtocol(
     public void setProtocol(ShapeId protocol) {
         this.protocol = Objects.requireNonNull(protocol);
     }
+
+    @SmithyInternalApi
+    public ArtifactType getArtifactType() {
+        return artifactType;
+    }
+
+    @SmithyInternalApi
+    public void setArtifactType(ArtifactType artifactType) {
+        this.artifactType = artifactType;
+    }
 }

codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/GoWriter.java

@@ -47,6 +47,7 @@
 import software.amazon.smithy.model.traits.StringTrait;
 import software.amazon.smithy.utils.AbstractCodeWriter;
 import software.amazon.smithy.utils.ListUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 import software.amazon.smithy.utils.StringUtils;
 
 /**
@@ -56,6 +57,7 @@
  *
  * <p>Use the {@code $P} formatter to refer to {@link Symbol}s using pointers where appropriate.
  */
+@SmithyInternalApi
 public final class GoWriter extends AbstractCodeWriter<GoWriter> {
 
     private static final Logger LOGGER = Logger.getLogger(GoWriter.class.getName());
@@ -773,7 +775,8 @@ public GoWriter writeRawPackageDocs(String docs) {
      * @param shape Shape to write the documentation of.
      * @return Returns true if docs were written.
      */
-    boolean writeShapeDocs(Shape shape) {
+    @SmithyInternalApi
+    public boolean writeShapeDocs(Shape shape) {
         return shape.getTrait(DocumentationTrait.class)
                 .map(DocumentationTrait::getValue)
                 .map(docs -> {
@@ -788,7 +791,7 @@ boolean writeShapeDocs(Shape shape) {
      * @param shape Shape to write the documentation of.
      * @return Returns true if docs were written.
      */
-    boolean writePackageShapeDocs(Shape shape) {
+    public boolean writePackageShapeDocs(Shape shape) {
         return shape.getTrait(DocumentationTrait.class)
                 .map(DocumentationTrait::getValue)
                 .map(docs -> {

codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/IntEnumGenerator.java

@@ -26,19 +26,21 @@
 import software.amazon.smithy.model.shapes.MemberShape;
 import software.amazon.smithy.model.traits.DocumentationTrait;
 import software.amazon.smithy.model.traits.EnumValueTrait;
+import software.amazon.smithy.utils.SmithyInternalApi;
 import software.amazon.smithy.utils.StringUtils;
 
 /**
  * Renders intEnums and their constants.
  */
-final class IntEnumGenerator implements Runnable {
+@SmithyInternalApi
+public final class IntEnumGenerator implements Runnable {
     private static final Logger LOGGER = Logger.getLogger(IntEnumGenerator.class.getName());
 
     private final SymbolProvider symbolProvider;
     private final GoWriter writer;
     private final IntEnumShape shape;
 
-    IntEnumGenerator(SymbolProvider symbolProvider, GoWriter writer, IntEnumShape shape) {
+    public IntEnumGenerator(SymbolProvider symbolProvider, GoWriter writer, IntEnumShape shape) {
         this.symbolProvider = symbolProvider;
         this.writer = writer;
         this.shape = shape;

codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/ManifestWriter.java

@@ -34,11 +34,13 @@
 import software.amazon.smithy.model.node.StringNode;
 import software.amazon.smithy.model.traits.UnstableTrait;
 import software.amazon.smithy.utils.SmithyBuilder;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Generates a manifest description of the generated code, minimum go version,
  * and minimum dependencies required.
  */
+@SmithyInternalApi
 public final class ManifestWriter {
 
     private static final Logger LOGGER = Logger.getLogger(ManifestWriter.class.getName());

codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/StructureGenerator.java

@@ -28,11 +28,13 @@
 import software.amazon.smithy.model.traits.StreamingTrait;
 import software.amazon.smithy.utils.MapUtils;
 import software.amazon.smithy.utils.SetUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Renders structures.
  */
-final class StructureGenerator implements Runnable {
+@SmithyInternalApi
+public final class StructureGenerator implements Runnable {
     private static final Map<String, String> STANDARD_ERROR_MEMBERS = MapUtils.of(
             "ErrorCode", "string",
             "ErrorMessage", "string",
@@ -48,7 +50,7 @@ final class StructureGenerator implements Runnable {
     private final ServiceShape service;
     private final ProtocolGenerator protocolGenerator;
 
-    StructureGenerator(
+    public StructureGenerator(
             Model model,
             SymbolProvider symbolProvider,
             GoWriter writer,

codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/SymbolVisitor.java

@@ -62,6 +62,7 @@
 import software.amazon.smithy.model.traits.EnumTrait;
 import software.amazon.smithy.model.traits.ErrorTrait;
 import software.amazon.smithy.model.traits.StreamingTrait;
+import software.amazon.smithy.utils.SmithyInternalApi;
 import software.amazon.smithy.utils.StringUtils;
 
 /**
@@ -70,7 +71,8 @@
  * <p>Reserved words for Go are automatically escaped so that they are
  * suffixed with "_". See "reserved-words.txt" for the list of words.
  */
-final class SymbolVisitor implements SymbolProvider, ShapeVisitor<Symbol> {
+@SmithyInternalApi
+public final class SymbolVisitor implements SymbolProvider, ShapeVisitor<Symbol> {
     private static final Logger LOGGER = Logger.getLogger(SymbolVisitor.class.getName());
 
     private final Model model;
@@ -82,7 +84,7 @@ final class SymbolVisitor implements SymbolProvider, ShapeVisitor<Symbol> {
     private final GoPointableIndex pointableIndex;
     private final GoSettings settings;
 
-    SymbolVisitor(Model model, GoSettings settings) {
+    public SymbolVisitor(Model model, GoSettings settings) {
         this.model = model;
         this.settings = settings;
         this.rootModuleName = settings.getModuleName();

codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/UnionGenerator.java

@@ -29,10 +29,12 @@
 import software.amazon.smithy.model.shapes.UnionShape;
 import software.amazon.smithy.model.traits.ErrorTrait;
 import software.amazon.smithy.model.traits.StreamingTrait;
+import software.amazon.smithy.utils.SmithyInternalApi;
 
 /**
  * Renders unions and type aliases for all their members.
  */
+@SmithyInternalApi
 public class UnionGenerator {
     public static final String UNKNOWN_MEMBER_NAME = "UnknownUnionMember";
 
@@ -41,7 +43,7 @@ public class UnionGenerator {
     private final UnionShape shape;
     private final boolean isEventStream;
 
-    UnionGenerator(Model model, SymbolProvider symbolProvider, UnionShape shape) {
+    public UnionGenerator(Model model, SymbolProvider symbolProvider, UnionShape shape) {
         this.model = model;
         this.symbolProvider = symbolProvider;
         this.shape = shape;

codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/integration/GoIntegration.java

@@ -21,17 +21,20 @@
 import software.amazon.smithy.codegen.core.SymbolProvider;
 import software.amazon.smithy.go.codegen.GoDelegator;
 import software.amazon.smithy.go.codegen.GoSettings;
+import software.amazon.smithy.go.codegen.GoSettings.ArtifactType;
 import software.amazon.smithy.go.codegen.GoWriter;
 import software.amazon.smithy.go.codegen.TriConsumer;
 import software.amazon.smithy.model.Model;
 import software.amazon.smithy.model.shapes.ServiceShape;
 import software.amazon.smithy.model.shapes.Shape;
+import software.amazon.smithy.utils.SmithyUnstableApi;
 
 /**
  * Java SPI for customizing Go code generation, registering
  * new protocol code generators, renaming shapes, modifying the model,
  * adding custom code, etc.
  */
+@SmithyUnstableApi
 public interface GoIntegration {
     /**
      * Gets the sort order of the customization from -128 to 127.
@@ -49,6 +52,10 @@ default byte getOrder() {
         return 0;
     }
 
+    default ArtifactType getArtifactType() {
+        return ArtifactType.CLIENT;
+    }
+
     /**
      * Preprocess the model before code generation.
      *