name: CI

on:
  push:
  pull_request:

permissions:
  contents: read

jobs:
  shellcheck:
    name: ShellCheck
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
      - name: Run ShellCheck (errors only)
        # Check every tracked file that has a .sh extension or an sh/bash
        # shebang. SC2148 (missing shebang) is excluded because many .sh
        # files are sourced fragments or dracut hooks; ShellCheck then
        # falls back to checking them as bash.
        run: |
          shebang_re='^#!.*[/ ](sh|bash|dash|ash|ksh)([[:blank:]]|$)'
          {
            git ls-files '*.sh'
            git ls-files | while IFS= read -r f; do
              [ -f "$f" ] || continue
              firstline=
              # An empty file makes read fail, which under -e would end the run.
              IFS= read -r -n 200 firstline < "$f" 2>/dev/null || true
              if [[ $firstline =~ $shebang_re ]]; then
                printf '%s\n' "$f"
              fi
            done
          } | sort -u > /tmp/shfiles
          # A selection that quietly comes up empty would check nothing and
          # still pass, so say how many files there are and insist on some.
          echo "$(wc -l < /tmp/shfiles) shell files"
          [ -s /tmp/shfiles ] || { echo '::error::No shell files found'; exit 1; }
          xargs -d '\n' shellcheck --severity=error --exclude=SC2148 < /tmp/shfiles

  ruff:
    name: Ruff
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
      # Pinned to an exact release: unlike actions/checkout, ruff-action
      # publishes no moving major tag past v3, so @v4 does not resolve.
      - uses: astral-sh/ruff-action@v4.1.0
        with:
          version: latest
          # Rule selection, file discovery (the many extensionless Python
          # executables) and exclusions all live in ruff.toml, so the whole
          # workspace can be handed over as-is.
          args: check --output-format=github

  pyrefly:
    name: Pyrefly
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
      - uses: facebook/pyrefly@main

  python-compileall:
    name: Python compileall
    runs-on: ubuntu-latest
    env:
      # One entry per Python version shipped by the distros confluent
      # targets, limited to versions actions/setup-python still provides
      # on current runners (sles15/alma8 ship 3.6, which is unavailable).
      # Newline-separated so it feeds both setup-python (multiline input)
      # and the shell loop below (word-split on whitespace).
      PYTHON_VERSIONS: |
        3.8
        3.9
        3.10
        3.12
        3.13
        3.14
    steps:
      - uses: actions/checkout@v7
      - uses: actions/setup-python@v6
        with:
          python-version: ${{ env.PYTHON_VERSIONS }}
      - name: List the Python files without a .py name
        # compileall only ever compiles *.py: handed anything else, even by
        # name, it skips it and still exits 0. That leaves every extensionless
        # CLI tool, deploy script and setup.py.tmpl unchecked, so collect them
        # here and feed them to py_compile, which does compile what it is
        # given. The first line is read with the shell builtin rather than
        # forking head and grep per file.
        run: |
          shebang_re='^#!.*python'
          {
            git ls-files | while IFS= read -r f; do
              [ -f "$f" ] || continue
              case "$f" in *.py) continue ;; esac
              firstline=
              # An empty file makes read fail, which under -e would end the run.
              IFS= read -r -n 200 firstline < "$f" 2>/dev/null || true
              if [[ $firstline =~ $shebang_re ]]; then
                printf '%s\n' "$f"
              fi
            done
            # Python that carries no shebang at all, so nothing can detect it.
            # Kept in step with extend-include in ruff.toml.
            git ls-files '*/setup.py.tmpl' '*/scripts/configbmc' \
                         '*/scripts/add_local_repositories' 'misc/filterpasswd'
          } | sort -u > /tmp/pyfiles
          # An empty list would leave py_compile with nothing to do and the
          # job green, which is the very hole this step exists to close.
          echo "$(wc -l < /tmp/pyfiles) files without a .py name"
          [ -s /tmp/pyfiles ] || { echo '::error::No such files found'; exit 1; }
      - name: Compile all Python files
        run: |
          rc=0
          for v in $PYTHON_VERSIONS; do
            echo "::group::Python $v"
            ok=0
            "python$v" -W error -m compileall -q -x '/\.git/' . || ok=1
            xargs -d '\n' "python$v" -W error -m py_compile < /tmp/pyfiles || ok=1
            echo "::endgroup::"
            if [ "$ok" -ne 0 ]; then
              echo "::error::Python $v compileall failed"
              rc=1
            fi
          done
          exit "$rc"