feat: Add Kotlin (JVM) support

Provide rules to build Kotlin proto and grpc libraries. Currently
upstream Protobuf and gRPC support only JVM-flavour Kotlin.

Fixes rules-proto-grpc#139.

Author: Zetten

README.md

@@ -76,6 +76,10 @@ Full documentation for the current and previous versions [can be found here](htt
 | [Java](https://rules-proto-grpc.com/en/latest/lang/java.html) | [java_grpc_compile](https://rules-proto-grpc.com/en/latest/lang/java.html#java-grpc-compile) | Generates a Java protobuf and gRPC srcjar file ([example](/example/java/java_grpc_compile)) |
 | [Java](https://rules-proto-grpc.com/en/latest/lang/java.html) | [java_proto_library](https://rules-proto-grpc.com/en/latest/lang/java.html#java-proto-library) | Generates a Java protobuf library using ``java_library`` ([example](/example/java/java_proto_library)) |
 | [Java](https://rules-proto-grpc.com/en/latest/lang/java.html) | [java_grpc_library](https://rules-proto-grpc.com/en/latest/lang/java.html#java-grpc-library) | Generates a Java protobuf and gRPC library using ``java_library`` ([example](/example/java/java_grpc_library)) |
+| [Kotlin](https://rules-proto-grpc.com/en/latest/lang/kotlin.html) | [kotlin_proto_compile](https://rules-proto-grpc.com/en/latest/lang/kotlin.html#kotlin-proto-compile) | Generates a Kotlin (JVM) protobuf srcjar file ([example](/example/kotlin/kotlin_proto_compile)) |
+| [Kotlin](https://rules-proto-grpc.com/en/latest/lang/kotlin.html) | [kotlin_grpc_compile](https://rules-proto-grpc.com/en/latest/lang/kotlin.html#kotlin-grpc-compile) | Generates a Kotlin (JVM) protobuf and gRPC srcjar file ([example](/example/kotlin/kotlin_grpc_compile)) |
+| [Kotlin](https://rules-proto-grpc.com/en/latest/lang/kotlin.html) | [kotlin_proto_library](https://rules-proto-grpc.com/en/latest/lang/kotlin.html#kotlin-proto-library) | Generates a Kotlin (JVM) protobuf library using ``kt_jvm_library`` ([example](/example/kotlin/kotlin_proto_library)) |
+| [Kotlin](https://rules-proto-grpc.com/en/latest/lang/kotlin.html) | [kotlin_grpc_library](https://rules-proto-grpc.com/en/latest/lang/kotlin.html#kotlin-grpc-library) | Generates a Kotlin (JVM) protobuf and gRPC library using ``kt_jvm_library`` ([example](/example/kotlin/kotlin_grpc_library)) |
 | [JavaScript](https://rules-proto-grpc.com/en/latest/lang/js.html) | [js_proto_compile](https://rules-proto-grpc.com/en/latest/lang/js.html#js-proto-compile) | Generates JavaScript protobuf ``.js`` and ``.d.ts`` files ([example](/example/js/js_proto_compile)) |
 | [JavaScript](https://rules-proto-grpc.com/en/latest/lang/js.html) | [js_grpc_node_compile](https://rules-proto-grpc.com/en/latest/lang/js.html#js-grpc-node-compile) | Generates JavaScript protobuf and gRPC-node ``.js`` and ``.d.ts`` files ([example](/example/js/js_grpc_node_compile)) |
 | [JavaScript](https://rules-proto-grpc.com/en/latest/lang/js.html) | [js_grpc_web_compile](https://rules-proto-grpc.com/en/latest/lang/js.html#js-grpc-web-compile) | Generates JavaScript protobuf and gRPC-Web ``.js`` and ``.d.ts`` files ([example](/example/js/js_grpc_web_compile)) |

WORKSPACE

@@ -20,6 +20,54 @@ rules_proto_dependencies()
 
 rules_proto_toolchains()
 
+#
+# Java
+#
+load("//java:repositories.bzl", "java_repos")
+
+java_repos()
+
+#
+# Kotlin-JVM
+#
+#
+# Load rules_kotlin/com_github_grpc_grpc_kotlin before #grpc_extra_deps, as it depends on an older version.
+# Also so we can get the maven_install artifacts/override_targets.
+#
+load("//kotlin:repositories.bzl", "kotlin_repos")
+
+kotlin_repos()
+
+load("@io_bazel_rules_kotlin//kotlin:repositories.bzl", "kotlin_repositories")
+
+kotlin_repositories()
+
+load("@io_bazel_rules_kotlin//kotlin:core.bzl", "kt_register_toolchains")
+
+kt_register_toolchains()
+
+load("@rules_jvm_external//:defs.bzl", "maven_install")
+load("@io_grpc_grpc_java//:repositories.bzl", "IO_GRPC_GRPC_JAVA_ARTIFACTS", "IO_GRPC_GRPC_JAVA_OVERRIDE_TARGETS", "grpc_java_repositories")
+load("@com_github_grpc_grpc_kotlin//:repositories.bzl", "IO_GRPC_GRPC_KOTLIN_ARTIFACTS", "IO_GRPC_GRPC_KOTLIN_OVERRIDE_TARGETS", "grpc_kt_repositories")
+
+maven_install(
+    artifacts = IO_GRPC_GRPC_JAVA_ARTIFACTS + IO_GRPC_GRPC_KOTLIN_ARTIFACTS,
+    generate_compat_repositories = True,
+    override_targets = dict(IO_GRPC_GRPC_JAVA_OVERRIDE_TARGETS.items() +
+                            IO_GRPC_GRPC_KOTLIN_OVERRIDE_TARGETS.items()),
+    repositories = [
+        "https://repo.maven.apache.org/maven2/",
+    ],
+)
+
+load("@maven//:compat.bzl", "compat_repositories")
+
+compat_repositories()
+
+grpc_java_repositories()
+
+grpc_kt_repositories()
+
 #
 # Android
 #
@@ -91,24 +139,6 @@ load("//android:repositories.bzl", "android_repos")
 
 android_repos()
 
-load("@rules_jvm_external//:defs.bzl", "maven_install")
-load("@io_grpc_grpc_java//:repositories.bzl", "IO_GRPC_GRPC_JAVA_ARTIFACTS", "IO_GRPC_GRPC_JAVA_OVERRIDE_TARGETS", "grpc_java_repositories")
-
-maven_install(
-    artifacts = IO_GRPC_GRPC_JAVA_ARTIFACTS,
-    generate_compat_repositories = True,
-    override_targets = IO_GRPC_GRPC_JAVA_OVERRIDE_TARGETS,
-    repositories = [
-        "https://repo.maven.apache.org/maven2/",
-    ],
-)
-
-load("@maven//:compat.bzl", "compat_repositories")
-
-compat_repositories()
-
-grpc_java_repositories()
-
 load("@build_bazel_rules_android//android:sdk_repository.bzl", "android_sdk_repository")
 
 android_sdk_repository(name = "androidsdk")
@@ -181,15 +211,6 @@ load("@grpc_ecosystem_grpc_gateway//:repositories.bzl", "go_repositories")
 
 go_repositories()
 
-#
-# Java
-#
-load("//java:repositories.bzl", "java_repos")
-
-java_repos()
-
-# grpc_java_repositories already called above in android
-
 #
 # JavaScript
 #

docs/index.rst

@@ -92,9 +92,9 @@ notified of new releases, you can use GitHub's 'Watch Releases Only' on the repo
 
    http_archive(
        name = "rules_proto_grpc",
-       sha256 = "fb7fc7a3c19a92b2f15ed7c4ffb2983e956625c1436f57a3430b897ba9864059",
-       strip_prefix = "rules_proto_grpc-4.3.0",
-       urls = ["https://github.com/rules-proto-grpc/rules_proto_grpc/archive/4.3.0.tar.gz"],
+       sha256 = "{ARCHIVE_TAR_GZ_SHA256}",
+       strip_prefix = "rules_proto_grpc-{GIT_COMMIT_ID}",
+       urls = ["https://github.com/rules-proto-grpc/rules_proto_grpc/archive/{GIT_COMMIT_ID}.tar.gz"],
    )
 
    load("@rules_proto_grpc//:repositories.bzl", "rules_proto_grpc_toolchains", "rules_proto_grpc_repos")