create-release.yaml

name: Init Release
on:
  workflow_dispatch:
    inputs:
      TARGET_VERSION:
        description: 'TARGET_VERSION to build manifests (e.g. 2.5.0-rc1) Note: the `v` prefix is not used'
        required: true
        type: string

jobs:
  prepare-release:
    permissions:
      contents: write  # for peter-evans/create-pull-request to create branch
      pull-requests: write  # for peter-evans/create-pull-request to create a PR
    name: Automatically generate version and manifests on ${{ inputs.TARGET_VERSION }}
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout code
        uses: actions/checkout@v3        
        with:
          fetch-depth: 0
          ref: releases/${{ inputs.TARGET_VERSION }}

      - name: Check if TARGET_VERSION is well formed.
        run: |
          set -xue
          # Target version must not contain 'v' prefix
          if echo "${{ inputs.TARGET_VERSION }}" | grep -e '^v'; then
            echo "::error::Target version '${{ inputs.TARGET_VERSION }}' should not begin with a 'v' prefix, refusing to continue." >&2
            exit 1
          fi

      - name: create pull request
        run: gh pr create -H main -B releases/${{ inputs.TARGET_VERSION }} --title 'Create new branch releases/${{ inputs.TARGET_VERSION }} from main' --body 'Create new version ${{ inputs.TARGET_VERSION }}'
        env:
            GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}