Update github release workflow

.github/workflows/release_github.yml

@@ -28,7 +28,7 @@ env:
 
 jobs:
   checks:
-    name: Check requirements
+    name: Check requirements for PR to be merged
     runs-on: ubuntu-latest
     steps:
       - name: Fail if main branch was selected
@@ -102,7 +102,7 @@ jobs:
         run: python3 -m build
 
   merge_and_bump:
-    name: Merge the changes into main and bump the version
+    name: Test and apply merging and bumping
     needs: test_python_releases
     runs-on: ubuntu-latest
     outputs:
@@ -123,12 +123,6 @@ jobs:
           git config user.name "GitHub Actions"
           git config -l
 
-      - name: Merge branch into main
-        run: |
-          git switch main
-          git branch -f ${{ github.ref_name }} origin/${{ github.ref_name }}
-          git merge ${{ github.ref_name }} --no-ff --no-edit
-
       - name: Install Python
         uses: actions/setup-python@v5.1.1
         with:
@@ -140,7 +134,70 @@ jobs:
           python3 -m pip install pyproject-deplister
           pyproject-deplister --extra dev --path pyproject.toml | grep bump-my-version | sed 's/ //g' | xargs -I{} python3 -m pip install "{}"
 
-      - name: Pass Inputs to Shell
+      - name: Test merging PR into main
+        run: |
+          git fetch origin main
+          git checkout -B temp_main_${{github.ref_name}}_${{github.run_id}} origin/main
+          git branch -f ${{ github.ref_name }} origin/${{ github.ref_name }}
+          git merge ${{ github.ref_name }} --no-ff --no-edit
+
+      - name: Test bumping version
+        id: temp_bump
+        shell: bash
+        run: |
+          bump-my-version bump ${{ inputs.version_level }} --commit --no-tag
+          ([[ $? -gt 0 ]] && echo "bumped=false" || echo "bumped=true") >> $GITHUB_OUTPUT
+
+      - name: Fail if bumping failes
+        if: steps.temp_bump.outputs.bumped == 'false'
+        run: |
+          echo "Bumping failed on temp branch."
+          git reset --hard HEAD^
+          exit 1
+
+      - name: Succeed if version is bumped
+        if: steps.temp_bump.outputs.bumped == 'true'
+        run: |
+          echo "Version would be bumped to $(bump-my-version show current_version)!"
+
+      - name: Test merging into develop
+        run: |
+          git fetch origin develop
+          git checkout -B temp_develop_${{github.ref_name}}_${{github.run_id}} origin/develop
+          git merge temp_main_${{github.ref_name}}_${{github.run_id}}
+
+      - name: Get current main commit hash
+        id: premerge
+        run: |
+          git fetch origin main
+          echo "hash=$(git rev-parse origin/main)" >> $GITHUB_OUTPUT
+
+      - name: Merge PR
+        run: |
+          gh pr merge ${{ github.ref_name }} --merge --delete-branch --squash=false --admin
+
+      - name: Wait for main to update
+        id: waitmain
+        run: |
+          for i in {1..10}; do
+            git fetch origin main
+            NEW_HASH=$(git rev-parse origin/main)
+            if [ "$NEW_HASH" != "${{ steps.premerge.outputs.hash }}" ]; then
+              echo "Main branch updated."
+              exit 0
+            fi
+            echo "Waiting for main branch to update..."
+            sleep 6
+          done
+          echo "Timeout: main branch did not update in time."
+          exit 1
+
+      - name: Checkout main
+        run: |
+          git switch main
+          git pull origin main
+
+      - name: Bump version
         id: bump
         shell: bash
         run: |
@@ -203,21 +260,3 @@ jobs:
               --title="Release v${{ needs.merge_and_bump.outputs.new-version }}" \
               --generate-notes \
               --draft
-
-  remove_branch:
-    name: Remove PR branch
-    needs: github_release
-    if: ${{ github.ref_name != 'develop' }}
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          ref: develop
-          fetch-depth: 0
-
-      - name: Remove PR branch
-        uses: dawidd6/action-delete-branch@v3
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          branches: ${{ github.ref_name }}