check if there is a first commit before this one - fixes fatal error …

…when pushing a merging a branch without a previous commit (#4)

.github/workflows/deploy.yml

@@ -20,18 +20,28 @@ jobs:
       - name: Install bumpversion
         run: pip install bump2version
 
-      - name: List changes
-        id: list-changes
+      # Determine changes
+      - name: Determine changed files
+        id: determine_changes
         run: |
-          git diff --name-only HEAD^ HEAD > changes.txt
+          git diff main@{1} main > changes.txt
           echo "::set-output name=status::$(grep -qvE '^docs/|^README.md|^\.env\.sample$|^config\.json\.sample$|^\.github/workflows/|\.bumpversion\.cfg$' changes.txt && echo 'code' || echo 'docs')"
 
+      # Conditional step based on changes
+      - name: Version Bump and Push
+        if: steps.determine_changes.outputs.status == 'code'
+        run: |
+          bump2version patch --config-file .bumpversion.cfg
+          git config --local user.email "[email protected]"
+          git config --local user.name "GitHub Action"
+          git push --tags
+
       - name: Get last commit message
         id: get-commit-message
         run: echo "::set-output name=message::$(git log -1 --pretty=%B)"
 
       - name: Determine version bump type
-        if: steps.list-changes.outputs.status == 'code'
+        if: steps.determine_changes.outputs.status == 'code'
         id: version-bump-type
         run: |
           echo "Commit message: ${{ steps.get-commit-message.outputs.message }}"
@@ -44,17 +54,18 @@ jobs:
           fi
 
       - name: Bump version
-        if: steps.list-changes.outputs.status == 'code'
+        if: steps.determine_changes.outputs.status == 'code'
         run: bumpversion ${{ steps.version-bump-type.outputs.type }}
 
       - name: Push changes
-        if: steps.list-changes.outputs.status == 'code'
+        if: steps.determine_changes.outputs.status == 'code'
         run: |
           git config --local user.email "[email protected]"
           git config --local user.name "GitHub Action"
           git push && git push --tags
 
       - name: Build and publish
+        if: steps.determine_changes.outputs.status == 'code'
         env:
           TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
           TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}