name: Check for bashisms

on:
  pull_request:
    paths:
      - '**/*.sh'
  merge_group:
  workflow_dispatch:

jobs:
  check-bashisms:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4
      - run: git fetch origin ${{ github.base_ref }}

      - name: Install devscripts
        run: sudo apt-get update && sudo apt-get install -y devscripts

      - name: Get changed .sh files (PR only)
        id: changed-sh-files
        if: github.event_name == 'pull_request'
        uses: tj-actions/changed-files@v45
        with:
          files: '**/*.sh'

      - name: Get all .sh files (if workflow dispatched)
        id: sh-files
        if: github.event_name != 'pull_request'
        run: |
          files=$(find . -type f -name "*.sh" | tr '\n' ' ')
          echo "files=${files:-none}" >> $GITHUB_ENV

      - name: Set FILES for bashism check
        id: set-files
        run: |
          if [[ "${{ steps.changed-sh-files.outputs.any_changed }}" == 'true' ]]; then
            echo "FILES=${{ steps.changed-sh-files.outputs.all_changed_files }}" >> $GITHUB_ENV
          else
            echo "FILES=${{ env.files }}" >> $GITHUB_ENV
          fi

      - name: Check for bashisms
        run: |
          IFS=' ' read -r -a file_array <<< "$FILES"
          checkbashisms "${file_array[@]}"