ci: extract the cruby-package job

with the expectation that we can re-use it in upstream.yml to test
against rake-compiler-dock snapshots.

.github/workflows/_cruby_package.yml

@@ -0,0 +1,44 @@
+on:
+  workflow_call:
+    inputs:
+      rcd_image_version:
+        description: The version of the rake-compiler-dock image to use
+        required: true
+        type: string
+
+jobs:
+  cruby-package:
+    name: "cruby-package"
+    strategy:
+      fail-fast: false
+      matrix:
+        plat:
+          - "aarch64-linux"
+          - "arm-linux"
+          - "arm64-darwin"
+          - "x64-mingw-ucrt"
+          - "x64-mingw32"
+          - "x86-linux"
+          - "x86-mingw32" # github actions does not support this runtime as of 2022-12, but let's build anyway
+          - "x86_64-darwin"
+          - "x86_64-linux"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - uses: actions/cache@v4
+        with:
+          path: ports/archives
+          key: tarballs-ubuntu-${{ hashFiles('dependencies.yml', 'patches/**/*.patch') }}
+      - env:
+          DOCKER_IMAGE: "ghcr.io/rake-compiler/rake-compiler-dock-image:${{ inputs.rcd_image_version }}-mri-${{ matrix.plat }}"
+        run: |
+          docker run --rm -v "$(pwd):/nokogiri" -w /nokogiri \
+            ${DOCKER_IMAGE} \
+            ./scripts/test-gem-build gems ${{ matrix.plat }}
+      - uses: actions/upload-artifact@v4
+        with:
+          name: "cruby-${{ matrix.plat }}-gem"
+          path: gems
+          retention-days: 1

.github/workflows/ci.yml

@@ -572,40 +572,9 @@ jobs:
 
   cruby-package:
     needs: ["rcd_image_version"]
-    name: "cruby-package"
-    strategy:
-      fail-fast: false
-      matrix:
-        plat:
-          - "aarch64-linux"
-          - "arm-linux"
-          - "arm64-darwin"
-          - "x64-mingw-ucrt"
-          - "x64-mingw32"
-          - "x86-linux"
-          - "x86-mingw32" # github actions does not support this runtime as of 2022-12, but let's build anyway
-          - "x86_64-darwin"
-          - "x86_64-linux"
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          submodules: true
-      - uses: actions/cache@v4
-        with:
-          path: ports/archives
-          key: tarballs-ubuntu-${{hashFiles('dependencies.yml', 'patches/**/*.patch')}}
-      - env:
-          DOCKER_IMAGE: "ghcr.io/rake-compiler/rake-compiler-dock-image:${{needs.rcd_image_version.outputs.rcd_image_version}}-mri-${{matrix.plat}}"
-        run: |
-          docker run --rm -v "$(pwd):/nokogiri" -w /nokogiri \
-            ${DOCKER_IMAGE} \
-            ./scripts/test-gem-build gems ${{matrix.plat}}
-      - uses: actions/upload-artifact@v4
-        with:
-          name: "cruby-${{matrix.plat}}-gem"
-          path: gems
-          retention-days: 1
+    uses: .github/workflows/_cruby_package.yml
+    with:
+      rcd_image_version: ${{ needs.rcd_image_version.outputs.rcd_image_version }}
 
   cruby-x86-linux-install:
     needs: ["cruby-package"]

.github/workflows/upstream.yml

@@ -211,3 +211,8 @@ jobs:
       - run: bundle install --local || bundle install
       - run: bundle exec rake compile -- --disable-system-libraries
       - run: bundle exec rake test
+
+  rcd_image_version:
+    runs-on: ubuntu-latest
+    outputs:
+      rcd_image_version: "snapshot"