release fails if gh-pages branch doesn't yet exist

[paulczar]

the cr.sh script creates the worktree for gh-pages branch fails when the gh-pages doesn't yet exist.

We should add some logic to check if it exists, and if not, add it, rather than fail

https://github.com/helm/chart-releaser-action/blob/master/cr.sh#L217

[chrissng]

In the meanwhile one could add this step in GH action for pull request (e.g. linting your chart):

      - name: Check for gh-pages branch
        run: |
          git ls-remote --exit-code --heads origin gh-pages

[invidian]

In the meanwhile one could add this step in GH action for pull request (e.g. linting your chart):

I'm not sure how this helps, it just shifts the failure from later stage to early. It would be nice to have documented how to create this branch.

[thetredev]

My workaround:

- name: Configure Git
  run: |
    git config user.name "$GITHUB_ACTOR"
    git config user.email "$GITHUB_ACTOR@users.noreply.github.com"

- name: Create gh-pages branch if it doesn't exist
  continue-on-error: true
  run: |
    git checkout -b gh-pages || exit 1
    git rebase main
    git push origin gh-pages

    git checkout main

- name: Run chart-releaser
  uses: helm/chart-releaser-action@v1.5.0
  env:
    CR_TOKEN: ${{ secrets.GITHUB_TOKEN }}

But I think this is very ugly... I'll probably do my own thing instead. This action is not what I expected tbh..

Edit: To my surprise it works quite well once you get the hang of it.
Edit 2: Updated the code, because the old solution overwrote the gh-pages branch.