coreutils/.github/workflows/CheckScripts.yml

name: CheckScripts

# spell-checker:ignore ludeeus mfinelli

env:
  SCRIPT_DIR: 'util'

on:
  push:
    branches:
      - main
    paths:
      - 'util/**/*.sh'
  pull_request:
    branches:
      - main
    paths:
      - 'util/**/*.sh'

# End the current execution if there is a new changeset in the PR.
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}

jobs:
  shell_check:
    name: ShellScript/Check
    runs-on: ubuntu-latest
    permissions:
      contents: read
    steps:
      - uses: actions/checkout@v4
      - name: Run ShellCheck
        uses: ludeeus/action-shellcheck@master
        env:
          SHELLCHECK_OPTS: -s bash
        with:
          severity: warning
          scandir: ${{ env.SCRIPT_DIR }}
          format: tty

  shell_fmt:
    name: ShellScript/Format
    # no need to run in pr events
    # shfmt will be performed on main branch when the PR is merged
    if: github.event_name != 'pull_request'
    runs-on: ubuntu-latest
    needs: [ shell_check ]
    permissions:
      contents: write
      pull-requests: write
    steps:
      - uses: actions/checkout@v4
      - name: Setup shfmt
        uses: mfinelli/setup-shfmt@v3
      - name: Run shfmt
        shell: bash
        run: |
          # show differs first for every files that need to be formatted
          # fmt options: bash syntax, 4 spaces indent, indent for switch-case
          echo "## show the differences between formatted and original scripts..."
          find ${{ env.SCRIPT_DIR }} -name "*.sh" -print0 | xargs -0 shfmt -ln=bash -i 4 -ci -d || true
          # perform a shell format
          echo "## perform a shell format..."
          # ignore the error code because `-d` will always return false when the file has difference
          find ${{ env.SCRIPT_DIR }} -name "*.sh" -print0 | xargs -0 shfmt -ln=bash -i 4 -ci -w          
      - name: Commit any changes
        uses: EndBug/add-and-commit@v9
        with:
          default_author: github_actions
          message: "style: auto format by CI (shfmt)"
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}