CI: Draft a release on tag pushes

Signed-off-by: Timo Reichl <thetredev@gmail.com>

.github/workflows/build-push-tag.yml

@@ -80,3 +80,23 @@ jobs:
             docker push ${GHCR_PREFIX}/${REGISTRY_IMAGE}:${docker_image}-${{ github.ref_name }}
             docker push ${DOCKER_HUB_PREFIX}/${REGISTRY_IMAGE}:${docker_image}-${{ github.ref_name }}
           done
+
+      # Copied and modified from k0sctl: https://github.com/k0sproject/k0sctl/blob/main/.github/workflows/release.yaml
+      ## Ugly hack to get the tag name
+      ## github.ref gives the full reference like refs.tags.v0.0.1-beta1
+      - name: Get branch name to draft release
+        if: ${{ inputs.tag }}
+        id: branch_name
+        run: |
+          echo "TAG_NAME=${GITHUB_REF#refs/tags/}" >> ${GITHUB_OUTPUT}
+
+      - name: Draft release
+        if: ${{ inputs.tag }}
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          body: "${{ steps.branch_name.outputs.TAG_NAME }}"
+          tag_name: ${{ steps.branch_name.outputs.TAG_NAME }}
+          name: ${{ steps.branch_name.outputs.TAG_NAME }}
+          draft: true # So we can manually edit before publishing
+          prerelease: false