From 3971f6442eca64095e7e63d597c9f19e3c5e87fd Mon Sep 17 00:00:00 2001
From: Michael Vorburger <mike@vorburger.ch>
Date: Sat, 30 Dec 2023 16:23:08 +0100
Subject: [PATCH] feat (dist): Native Image {WIP, *BROKEN*}

---
 MODULE.bazel | 19 +++++++++++++++++++
 cli/BUILD    | 23 +++++++++++++++++++----
 2 files changed, 38 insertions(+), 4 deletions(-)

diff --git a/MODULE.bazel b/MODULE.bazel
index b3ce46a70..74716d410 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -60,3 +60,22 @@ bazel_dep(name = "gazelle", version = "0.35.0")
 
 go_sdk = use_extension("@rules_go//go:extensions.bzl", "go_sdk")
 go_sdk.host()
+
+# https://github.com/sgammon/rules_graalvm
+bazel_dep(name = "rules_graalvm", version = "0.10.3")
+
+gvm = use_extension("@rules_graalvm//:extensions.bzl", "graalvm")
+
+gvm.graalvm(
+    name = "graalvm",
+    # TODO Upgrade from 20.0.2 to 21.0.1 (here and also bump java_version below)
+    version = "20.0.2",  # See https://github.com/graalvm/graalvm-ce-builds/releases/ or https://www.graalvm.org/release-notes/ or https://www.graalvm.org/downloads/ ?
+    distribution = "ce", # `oracle`, `ce`, or `community`
+    java_version = "20", # `17`, `20`, or `21`, as supported by the version provided
+    components = [
+       # if you need components like `js` or `wasm`, add them here
+    ],
+)
+use_repo(gvm, "graalvm")
+register_toolchains("@graalvm//:jvm")
+register_toolchains("@graalvm//:sdk")
diff --git a/cli/BUILD b/cli/BUILD
index 88ba32502..a58d4aa8a 100644
--- a/cli/BUILD
+++ b/cli/BUILD
@@ -15,11 +15,11 @@
 # limitations under the License.
 
 load("@rules_java//java:defs.bzl", "java_binary", "java_test")
+load("@rules_graalvm//graalvm:defs.bzl", "native_image")
 
-java_binary(
-    name = "enola",
+java_library(
+    name = "enola_library",
     srcs = glob(["src/main/java/**/*.java"]),
-    main_class = "dev.enola.cli.Enola",
     deps = [
         "//common/common",
         "//common/markdown",
@@ -40,13 +40,28 @@ java_binary(
     ],
 )
 
+java_binary(
+    name = "enola",
+    main_class = "dev.enola.cli.Enola",
+    runtime_deps = [
+        ":enola_library",
+    ]
+)
+
+native_image(
+    name = "enola-native",
+    deps = [":enola_library"],
+    main_class = "dev.enola.cli.Enola",
+    native_image_tool = "@graalvm//:native-image",
+)
+
 [java_test(
     name = name[:-len(".java")],
     size = "small",
     srcs = glob(["src/test/java/**/*.java"]),
     resources = glob(["src/test/resources/**/*"]),
     deps = [
-        ":enola",
+        ":enola_library",
         "//common/common",
         "//common/markdown",
         "//core/impl",