Add CI test runs on Windows on ARM64

Author: larskanis

.github/workflows/ci.yml

@@ -549,9 +549,17 @@ jobs:
       matrix:
         sys: ["enable", "disable"]
         ruby: ${{ fromJSON(needs.ruby_versions.outputs.setup_ruby_win) }}
+        os: [ windows-2022 ]
         exclude:
           - ruby: "3.1" # because Ruby 3.1 devkit is built with a version of GCC too old for modern msys2 2025-08
-    runs-on: windows-2022
+        include:
+          - os: windows-11-arm
+            sys: "enable"
+            ruby: "3.4"
+          - os: windows-11-arm
+            sys: "disable"
+            ruby: "3.4"
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v5
         with:
@@ -713,6 +721,27 @@ jobs:
       - run: ./scripts/test-gem-install gems
         shell: bash
 
+  cruby-aarch64-mingw-ucrt-install:
+    needs: ["cruby-package", "ruby_versions"]
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby: ["3.4"]
+    runs-on: windows-11-arm
+    steps:
+      - uses: actions/checkout@v5
+        with:
+          submodules: true
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "${{matrix.ruby}}"
+      - uses: actions/download-artifact@v5
+        with:
+          name: cruby-aarch64-mingw-ucrt-gem
+          path: gems
+      - run: ./scripts/test-gem-install gems
+        shell: bash
+
   jruby-package:
     needs: ["rcd_image_version"]
     runs-on: ubuntu-latest

misc/native.yml

@@ -15,3 +15,10 @@ rubies:
   - "3.3"
   - "3.2"
   - "3.1"
+exclude:
+  - platform: aarch64-mingw-ucrt
+    ruby: "3.1"
+  - platform: aarch64-mingw-ucrt
+    ruby: "3.2"
+  - platform: aarch64-mingw-ucrt
+    ruby: "3.3"

scripts/test-gem-file-contents

@@ -73,7 +73,11 @@ describe File.basename(gemfile) do
   let(:native_config) { YAML.load_file(File.join(__dir__, "..", "misc", "native.yml")) }
 
   let(:supported_ruby_versions) do
-    native_config["rubies"]
+    versions = native_config["rubies"]
+    native_config["exclude"].each do |h|
+      versions -= [h["ruby"]] if h["platform"] == gemspec.platform.to_s
+    end
+    versions
   end
 
   describe "setup" do