grpc-pb: Make generated methods internal

Signed-off-by: Johannes Zottele <[email protected]>

Author: Jozott00

protoc-gen/src/main/kotlin/kotlinx/rpc/protobuf/CodeGenerator.kt

@@ -177,9 +177,13 @@ open class CodeGenerator(
         typeParameters: String = "",
         args: String = "",
         contextReceiver: String = "",
+        annotations: List<String> = emptyList(),
         returnType: String = "",
         block: (CodeGenerator.() -> Unit)? = null,
     ) {
+        for (annotation in annotations) {
+            addLine(annotation)
+        }
         val modifiersString = if (modifiers.isEmpty()) "" else "$modifiers "
         val contextString = if (contextReceiver.isEmpty()) "" else "$contextReceiver."
         val returnTypeString = if (returnType.isEmpty()) "" else ": $returnType"

protoc-gen/src/main/kotlin/kotlinx/rpc/protobuf/ModelToKotlinCommonGenerator.kt

@@ -261,6 +261,7 @@ class ModelToKotlinCommonGenerator(
         name = "decodeWith",
         modifiers = "internal",
         args = "msg: ${declaration.internalClassFullName()}, decoder: $PB_PKG.WireDecoder",
+        annotations = listOf("@$INTERNAL_RPC_API_ANNO"),
         contextReceiver = "${declaration.internalClassFullName()}.Companion"
     ) {
         whileBlock("!decoder.hadError()") {
@@ -382,6 +383,7 @@ class ModelToKotlinCommonGenerator(
     private fun CodeGenerator.generateMessageEncoder(declaration: MessageDeclaration) = function(
         name = "encodeWith",
         modifiers = "internal",
+        annotations = listOf("@$INTERNAL_RPC_API_ANNO"),
         args = "encoder: $PB_PKG.WireEncoder",
         contextReceiver = declaration.internalClassFullName(),
     ) {
@@ -460,8 +462,9 @@ class ModelToKotlinCommonGenerator(
     private fun CodeGenerator.generateInternalEnumConstructor(enum: EnumDeclaration) {
         function(
             "fromNumber",
-            modifiers = "private",
+            modifiers = "internal",
             args = "number: Int",
+            annotations = listOf("@$INTERNAL_RPC_API_ANNO"),
             contextReceiver = "${enum.name.safeFullName()}.Companion",
             returnType = enum.name.safeFullName(),
         ) {
@@ -483,7 +486,8 @@ class ModelToKotlinCommonGenerator(
      */
     private fun CodeGenerator.generateRequiredCheck(declaration: MessageDeclaration) = function(
         name = "checkRequiredFields",
-        modifiers = "private",
+        modifiers = "internal",
+        annotations = listOf("@$INTERNAL_RPC_API_ANNO"),
         contextReceiver = declaration.internalClassFullName(),
     ) {
         val requiredFields = declaration.actualFields.filter { it.dec.isRequired }
@@ -538,7 +542,8 @@ class ModelToKotlinCommonGenerator(
     private fun CodeGenerator.generateInternalCastExtension(declaration: MessageDeclaration) {
         function(
             "asInternal",
-            modifiers = "private",
+            modifiers = "internal",
+            annotations = listOf("@$INTERNAL_RPC_API_ANNO"),
             contextReceiver = declaration.name.safeFullName(),
             returnType = declaration.internalClassFullName(),
         ) {