A GitHub Action that automatically rebases pull requests.

On first run, AutoRebase will create an autorebase:opt-in label on your repository. Apply this label to pull requests you want to automatically be rebased on their target branch when out-of-date. AutoRebase will then try to rebase these pull requests automatically.

If a pull request cannot be rebased because of merge conflicts, AutoRebase will apply a label autorebase:non-rebaseable label to the PR. This label will automatically be removed if conflicts are resolved.

• Create a Github App token or a personal access token, granting write access on your repository.
• Head over to https://github.com/{owner}/{repo}/settings/secrets and create a new secret AUTOREBASE_TOKEN, and paste the token.
• Create a .github/workflows/autorebase.yml file in your repository and paste the following contents:

on:
  # Run on every push on every branch
  push:
    branches-ignore:
      # Ignore branches automatically created by github-rebase
      - rebase-pull-request**
      - cherry-pick-rebase-pull-request**
  # Run when pull requests get labeled
  pull_request:
    types: [labeled]

jobs:
  auto-rebase:
    name: AutoRebase
    runs-on: ubuntu-latest
    steps:
      - uses: TomChv/AutoRebase@v1
        with:
          # We can't use the built-in secrets.GITHUB_TOKEN yet because of this limitation:
          # https://github.community/t5/GitHub-Actions/Triggering-a-new-workflow-from-another-workflow/td-p/31676
          # In the meantime, use a token granting write access on the repo:
          # - a GitHub App token
          #   See https://github.com/marketplace/actions/github-app-token.
          # - a personal access token
          #   See https://help.github.com/en/articles/creating-a-personal-access-token-for-the-command-line.
          github_token: ${{ secrets.AUTOREBASE_TOKEN }}

AutoRebase will 'rewrite history' when rebasing pull requests: commits will be rewritten on top of the target branch and force pushed.

If you want to make changes to your pull request, you need to force push as well. We recommend the following strategy when doing this:

• Run git fetch
• Ensure there are no other changes made remotely to your pull request branch
• Run git push --force-with-lease to force push your changes.

AutoRebase is heavily inspired by tibdex/autosquash and tibdex/autorebase.

Forked from Label305 GitHub action.