action.yml

name: 'Update Staging Branch'
description: 'Update a staging branch onto main as part of Nightly CI'
branding:
  icon: 'git-commit'
  color: 'blue'

inputs:
  user:
    description: |
      The name that will be associated with any created commits
    type: string
    required: true
  email:
    description: |
      The email address that will be associated with any created commits
    type: string
    required: true
  main-branch:
    description: |
      The name of the main branch.
    type: string
    default: 'main'
  staging-branch:
    description: |
      The name of the branch containing accumulated patches that need to be
      applied in order for the latest CIRCT to work with Chisel.
    type: string
    default: 'ci/ci-circt-nightly'

runs:
  using: composite
  steps:
    - name: 'Checkout'
      uses: actions/checkout@v4
      with:
        fetch-depth: 0
    - name: 'Rebase ${{ inputs.staging-branch }} onto ${{ inputs.main-branch }}'
      if: github.event_name != 'pull_request'
      shell: bash
      run: |
        # Rebase the staging branch on the default branch.  Create the staging
        # branch if it doesn't exist.
        git checkout -b ${{ inputs.staging-branch }} ${{ inputs.main-branch }}
        if [[ ! `git fetch origin ${{ inputs.staging-branch }}` ]]; then
          git reset --hard origin/${{ inputs.staging-branch }}
          git config user.name ${{ inputs.user }}
          git config user.email ${{ inputs.email }}
          git rebase origin/${{ inputs.main-branch }}
        fi

        git push --force origin ${{ inputs.staging-branch }}