update-upstream/action.yml

---
name: update-upstream
description: Update an upstram branch.
author: Michael Sasser <info@michaelsasser.org>

branding:
  icon: shield
  color: blue

inputs:
  # Upstream
  upstream_repo_url:
    description: The upstram repo to pull the new changes from.
    required: true

  upstream_repo_branch:
    description: The upstram branch to pull the new changes from.
    required: false
    default: "main"

  # Downstream
  downstream_repo_branch:
    description: The downstream branch to push the new changes to.
    required: false
    default: "upstream"

  #
  # Secrets
  #
  PERSONAL_ACCESS_TOKEN:
    description: The PAT for the local repository.
    required: true

runs:
  using: composite
  steps:
    - name: Update upstream branch
      shell: bash
      run: |
        git --version

        git config --global user.name '${{ gitea.actor }}'
        git config --global user.email '${{ gitea.actor }}@michaelsasser.org'
        git init -b '${{ inputs.downstream_repo_branch }}'

        # Local
        git remote add origin 'https://x-access-token:${{ inputs.PERSONAL_ACCESS_TOKEN }}@git.michaelsasser.org/${{ gitea.repository }}.git'

        # Upstream
        git remote add upstream ${{ inputs.upstream_repo_url }}
        git fetch --no-tags upstream 'refs/heads/${{ inputs.upstream_repo_branch }}'
        git reset --hard 'upstream/${{ inputs.upstream_repo_branch }}'
        git push --set-upstream origin ${{ inputs.downstream_repo_branch }} --force