name: Create Release PR

on:
  workflow_call:
    inputs:
      component-name:
        description: 'Component name'
        required: true
        type: string
      release-branch:
        description: 'Release branch'
        required: true
        type: string
    secrets:
      ci-access-token:
        description: 'CI access token'
        required: true

defaults:
  run:
    shell: bash -euo pipefail {0}

jobs:
  create-storage-release-branch:
    runs-on: ubuntu-22.04

    permissions:
      contents: write # for `git push`

    steps:
    - uses: actions/checkout@v4
      with:
        ref: main

    - name: Set variables
      id: vars
      env:
        COMPONENT_NAME: ${{ inputs.component-name }}
        RELEASE_BRANCH: ${{ inputs.release-branch }}
      run: |
        today=$(date +'%Y-%m-%d')
        echo "title=${COMPONENT_NAME} release ${today}" | tee -a ${GITHUB_OUTPUT}
        echo "rc-branch=rc/${RELEASE_BRANCH}/${today}"  | tee -a ${GITHUB_OUTPUT}

    - name: Configure git
      run: |
        git config user.name "github-actions[bot]"
        git config user.email "41898282+github-actions[bot]@users.noreply.github.com"

    - name: Create RC branch
      env:
        RC_BRANCH: ${{ steps.vars.outputs.rc-branch }}
        TITLE: ${{ steps.vars.outputs.title }}
      run: |
        git checkout -b "${RC_BRANCH}"

        # create an empty commit to distinguish workflow runs
        # from other possible releases from the same commit
        git commit --allow-empty -m "${TITLE}"

        git push origin "${RC_BRANCH}"

    - name: Create a PR into ${{ inputs.release-branch }}
      env:
        GH_TOKEN: ${{ secrets.ci-access-token }}
        RC_BRANCH: ${{ steps.vars.outputs.rc-branch }}
        RELEASE_BRANCH: ${{ inputs.release-branch }}
        TITLE: ${{ steps.vars.outputs.title }}
      run: |
        cat << EOF > body.md
          ## ${TITLE}

          **Please merge this Pull Request using 'Create a merge commit' button**
        EOF

        gh pr create --title "${TITLE}" \
                     --body-file "body.md" \
                     --head "${RC_BRANCH}" \
                     --base "${RELEASE_BRANCH}"