add cloned PR process to 24.04 base

.github/workflows/clone-pr.yaml

@@ -0,0 +1,33 @@
+name: Clone PR to test 24.04 base
+
+on:
+  pull_request:
+    types:
+      - opened
+      - synchronize
+
+jobs:
+  clone-pr:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout PR code
+        uses: actions/checkout@v3
+        with:
+          ref: ${{ github.event.pull_request.head.ref }}
+
+      - name: Install tox
+        run: |
+          pipx install tox
+
+      - name: Run switch to 24.04
+        run: |
+          tox run -e switch-24.04
+
+      - name: Create and push to a new branch
+        run: |
+          NEW_BRANCH="24.04-cloned-${{ github.event.pull_request.number }}"
+          git checkout -b $NEW_BRANCH
+          git add .
+          git commit -m "switch to 24.04"
+          git push origin $NEW_BRANCH

tox.ini

@@ -82,9 +82,9 @@ commands_pre =
 commands =
     poetry run pytest -v --tb native --log-cli-level=INFO -s --ignore={[vars]tests_path}/unit/ {posargs}
 
-[testenv:pack-24.04]
-description = Patch charmcraft.yaml with necessary changes for a 24.04 build, pack and restore
+[testenv:switch-24.04]
+description = Patch charmcraft.yaml with necessary changes for a 24.04 build
 allowlist_externals =
     sh
 commands =
-    sh -c "patch {toxinidir}/charmcraft.yaml < {toxinidir}/charmcraft-24.04.patch && charmcraft pack --project-dir={toxinidir}; git -C {toxinidir} restore charmcraft.yaml"
+    sh -c "patch {toxinidir}/charmcraft.yaml < {toxinidir}/charmcraft-24.04.patch"