name: CI

on:
  push:
    branches: [main, 'dev/**']
  pull_request:
    branches: [main]

jobs:
  test:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        emacs_version: ['28.1', '29.4', '30.1']
    steps:
      - uses: actions/checkout@v6

      - uses: purcell/setup-emacs@master
        with:
          version: ${{ matrix.emacs_version }}

      - name: Install dash from GNU ELPA
        run: |
          emacs -Q --batch --eval "(progn \
            (require 'package) \
            (setq package-user-dir (expand-file-name \".elpa\")) \
            (add-to-list 'package-archives '(\"gnu\" . \"https://elpa.gnu.org/packages/\")) \
            (package-initialize) \
            (package-refresh-contents) \
            (package-install 'dash))"
          # Trailing slash: match only the package directory, not the
          # adjacent dash-N.N.N.signed marker GNU ELPA leaves behind.
          echo "LOAD_EXTRA=-L $(ls -d "$PWD"/.elpa/dash-*/ | head -1)" >> "$GITHUB_ENV"

      - name: Byte-compile (warnings are errors)
        run: make compile-all WERROR=t LOAD_EXTRA="$LOAD_EXTRA"

      - name: ERT suite
        run: make test LOAD_EXTRA="$LOAD_EXTRA"

      - name: ERT suite (shuffled order)
        run: make test-shuffled LOAD_EXTRA="$LOAD_EXTRA"

      - name: README doctests
        run: |
          set -o pipefail
          make doctest LOAD_EXTRA="$LOAD_EXTRA" 2>&1 | tee doctest.log || {
            # Surface failing assertions as annotations (job logs are
            # not readable anonymously; annotations are).
            grep -E '^(FAIL|  expected:|  got:)' doctest.log | head -30 \
              | while IFS= read -r l; do echo "::error::${l}"; done
            grep -q '^FAIL' doctest.log || tail -n 8 doctest.log \
              | while IFS= read -r l; do echo "::error::${l}"; done
            exit 1
          }