get_target_branches.yml

name: Get target branches

on:
  workflow_call:
    outputs:
      target_branches:
        description: The array of merge target branches
        value: ${{ jobs.get_target_branches.outputs.target_branches }}

jobs:
  get_target_branches:
    name: Get target branches
    runs-on: ubuntu-latest
    outputs:
      target_branches: ${{ steps.output_target_branches.outputs.target_branches }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4.1.6
        with:
          fetch-depth: 0
      - name: Get target branches
        run: |
          echo '[' > ./branch_list.json
          git branch -r | grep '  origin/[A-Z][a-z]' | sed 's/  origin\//"/' | sed -z 's/\r//g; s/\n/", /g' | sed 's/, $//g' >> ./branch_list.json
          echo ']' >> ./branch_list.json
      - name: Output target branches
        id: output_target_branches
        run: echo target_branches=$(<./branch_list.json) >> $GITHUB_OUTPUT