ci: Add workflow to build changed manifests

Author: bbhtt

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
         run: |
           sudo add-apt-repository ppa:flatpak/stable
           sudo apt-get update
-          sudo apt-get install -y flatpak
+          sudo apt-get install -y flatpak dbus-daemon
           flatpak remote-add --user --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
           flatpak install flathub -y org.flatpak.Builder
 
@@ -42,3 +42,34 @@ jobs:
             echo "Error: YML/YAML file found: $files"
             exit 1
           fi
+
+      - name: Build changed manifests
+        if: github.event_name == 'pull_request'
+        run: |
+          set -e
+          FILES=$(gh pr view "${{ github.event.number }}" --json files --jq '.files[].path')
+
+          for f in $FILES; do
+            if [[ "$f" == *.json && -f "$f" ]]; then
+              echo "Building manifest for $f"
+
+              RUNTIME_VERSION=$(flatpak remote-ls --columns=ref flathub \
+                | grep "runtime/org.freedesktop.Platform/x86_64/" \
+                | sed 's|.*/||' \
+                | sort -V \
+                | tail -n1)
+
+              cat > manifest.yml <<EOF
+              id: org.example.test
+              runtime: org.freedesktop.Platform
+              runtime-version: '${RUNTIME_VERSION}'
+              sdk: org.freedesktop.Sdk
+              modules:
+                - "$f"
+              EOF
+
+              cat org.example.test.yml
+              dbus-run-session flatpak run org.flatpak.Builder --verbose --user --force-clean \
+                --install-deps-from=flathub builddir org.example.test.yml
+            fi
+          done