Use dotnet image for Godot 4 (#106)

.github/workflows/manual_build.yml

@@ -14,9 +14,29 @@ on:
 env:
   IMAGE_NAME: godot-ci
 jobs:
+  version:
+    name: Get Version
+    runs-on: ubuntu-22.04
+    outputs:
+      dotnet_version: ${{ steps.calculate.outputs.dotnet_version }}
+    steps:
+      - id: calculate
+        run: |
+          MAJOR_VERSION=$(echo ${{ github.event.inputs.version }} | cut -c -1)
+          MINOR_VERSION=$(echo ${{ github.event.inputs.version }} | cut -c -3)
+          if [ "$MAJOR_VERSION" = "3" ]
+          then
+              echo "dotnet_version=mono:latest" >> $GITHUB_OUTPUT
+          elif [ "$MINOR_VERSION" = "4.0" ] || [ "$MINOR_VERSION" = "4.1" ] || [ "$MINOR_VERSION" = "4.2" ] || [ "$MINOR_VERSION" = "4.3" ]
+          then
+              echo "dotnet_version=mcr.microsoft.com/dotnet/sdk:6.0-jammy" >> $GITHUB_OUTPUT
+          else
+              echo "dotnet_version=mcr.microsoft.com/dotnet/sdk:8.0-jammy" >> $GITHUB_OUTPUT
+          fi       
+
   build:
     name: Build Image
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v3
       - run:  echo IMAGE_OWNER=$(echo ${{ github.repository_owner }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
@@ -49,7 +69,8 @@ jobs:
             GODOT_PLATFORM=${{ startsWith( github.event.inputs.version, '3.' ) && 'linux_headless.64' || 'linux.x86_64' }}
   build-mono:
     name: Build Mono Image
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
+    needs: [version]
     steps:
       - uses: actions/checkout@v3
       - run:  echo IMAGE_OWNER=$(echo ${{ github.repository_owner }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
@@ -75,6 +96,7 @@ jobs:
             ghcr.io/${{ env.IMAGE_OWNER }}/${{ env.IMAGE_NAME }}:mono-${{ github.event.inputs.version }}${{ env.IMAGE_TAG }}
             ${{ secrets.DOCKERHUB_USERNAME }}/${{ env.IMAGE_NAME }}:mono-${{ github.event.inputs.version }}${{ env.IMAGE_TAG }}
           build-args: |
+            IMAGE=${{ needs.version.outputs.dotnet_version }}
             GODOT_VERSION=${{ github.event.inputs.version }}
             RELEASE_NAME=${{ github.event.inputs.release_name }}
             SUBDIR=${{  github.event.inputs.release_name != 'stable' && format('/{0}', github.event.inputs.release_name) || '' }}