See #2.

This task rebases a local branch onto another local branch or ref, all within the current GitHub repository.

Use this task to automate rebases within your own GitHub repository. Useful for floating ongoing work on top of an existing long-running branch or tag. (Such as when maintaining a fork.) For rebasing on top of a branch from another repository, considering triggering this task against a branch managed by an automated pull utility, such as this one from the Probot community: https://probot.github.io/apps/pull/)

name: Example Rebase
on:
  push:
    branches:
      # All pushes to this branch will trigger the task.
      - my-rebase-upstream-branch
    tags:
      # All pushes to this tag will trigger the task.
      - my-rebase-upstream-tag

jobs:
  rebase_branches:
    runs-on: ubuntu-latest
    steps:
      - name: Rebase head_branch on base_ref
        # Recommended: specify a version such as `@v1.0` rather than `@main`
        uses: DeeDeeG/rebase-github-action@main
        with:
          # Head branch, which will be rebased onto the base_ref.
          head_branch: my-rebase-head-breanch
          # Branch, or Git ref, that the head_branch will be rebased onto.
          base_ref: my-rebase-upstream-ref-or-branch

• base_ref must be a valid ref according to the folowing Git command:

  • git check-ref-format --allow-onelevel --normalize "${base_ref}"

• base_ref must be an existing ref or branch at your GitHub repository.

• head_branch must be an existing branch at your GitHub repository.

This Action is based heavily on https://github.com/actions-registry/github-repo-sync-upstream and somewhat on https://github.com/everlytic/branch-merge. Their license notices can be viewed here: https://github.com/DeeDeeG/rebase-github-action/tree/main/UPSTREAM_LICENSE_NOTICES