ci.yml

name: CI

# 每次 push 到 main 或開 PR 時，自動跑 repo 內所有 Makefile 的測試。
on:
  push:
    branches: [main]
  pull_request:
  workflow_dispatch:

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v5

      # 安裝 uv（Python 測試用 `uv run python` 跑，符合專案慣例）
      # 專案沒有 uv.lock / requirements，關掉 cache 避免無效快取警告
      - name: Install uv
        uses: astral-sh/setup-uv@v6
        with:
          enable-cache: false

      # gcc / g++ 在 ubuntu-latest 已預裝；顯示版本方便除錯
      - name: Show toolchain versions
        run: |
          g++ --version
          gcc --version
          make --version | head -1
          uv --version

      # 掃描每個 Makefile，挑最適合的 target（有 test 就 make test；否則 run；再否則 make），
      # 解析每個套件的「All N tests passed」，寫成 Markdown 表格到 Job Summary。
      - name: Run all Makefile tests
        run: |
          set -uo pipefail
          summary="${GITHUB_STEP_SUMMARY:-/dev/stdout}"
          {
            echo "## 🧪 Test Report"
            echo ""
            echo "| Suite | Target | Result | Status |"
            echo "|-------|--------|--------|--------|"
          } >> "$summary"
          overall=0; total_tests=0; total_suites=0; found=0
          while IFS= read -r mk; do
            found=1
            dir=$(dirname "$mk"); dir=${dir#./}
            if grep -qE '^test:' "$mk"; then target=test
            elif grep -qE '^run:' "$mk"; then target=run
            else target=build; fi
            echo "::group::$dir ($target)"
            if [ "$target" = build ]; then
              echo "$ make -C $dir"
              out=$(make -C "$dir" 2>&1); rc=$?
            else
              echo "$ make -C $dir $target"
              out=$(make -C "$dir" "$target" 2>&1); rc=$?
            fi
            echo "$out"
            echo "::endgroup::"
            [ "$rc" -ne 0 ] && overall=1
            label=""; ran_any=0
            while IFS= read -r line; do
              if [[ "$line" =~ ^===\ (.+)\ ===$ ]]; then
                label="${BASH_REMATCH[1]}"
              elif [[ "$line" =~ ^\./([^\ ]+) ]]; then
                [ -z "$label" ] && label="$dir → ${BASH_REMATCH[1]}"
              elif [[ "$line" =~ ^All\ ([0-9]+)\ tests\ passed$ ]]; then
                n="${BASH_REMATCH[1]}"; lbl="${label:-$dir}"
                echo "| \`$lbl\` | $target | $n passed | ✅ |" >> "$summary"
                label=""; ran_any=1
                total_tests=$((total_tests + n)); total_suites=$((total_suites + 1))
              fi
            done <<< "$out"
            if [ "$ran_any" -eq 0 ]; then
              if [ "$rc" -eq 0 ]; then
                echo "| \`$dir\` | $target | built & ran (smoke) | ✅ |" >> "$summary"
              else
                echo "| \`$dir\` | $target | FAILED | ❌ |" >> "$summary"
              fi
              total_suites=$((total_suites + 1))
            elif [ "$rc" -ne 0 ]; then
              echo "| \`$dir\` | $target | make failed | ❌ |" >> "$summary"
            fi
          done < <(find . -name Makefile -not -path '*/node_modules/*' | sort)
          {
            echo ""
            if [ "$overall" -eq 0 ]; then
              echo "**Total: $total_tests tests across $total_suites suites — ✅ all passed**"
            else
              echo "**Total: $total_tests tests across $total_suites suites — ❌ failures above**"
            fi
            echo ""
            echo "<details><summary>▶ 本機重現指令</summary>"
            echo ""
            echo '```bash'
            echo "make -C 1_Array_String test    # two pointers C++"
            echo "make -C dsa/linked_list run    # linked list demo (smoke)"
            echo "make -C google_dsa test        # 全部 24 套件 (C++ + Python)"
            echo "make -C google_dsa test-cpp    # 只 C++"
            echo "make -C google_dsa test-py     # 只 Python"
            echo "# 單一套件範例："
            echo "g++ -std=c++17 -Wall -Wextra -o google_dsa/09_heap/k_largest google_dsa/09_heap/k_largest.cpp && ./google_dsa/09_heap/k_largest"
            echo "( cd google_dsa/09_heap && uv run python test_k_largest.py )"
            echo '```'
            echo ""
            echo "> 展開任一 job step 的 log group（依資料夾折疊），每個套件上方的 \`\$ …\` 就是實際執行的指令。"
            echo "</details>"
          } >> "$summary"
          if [ "$found" -eq 0 ]; then echo "No Makefile found" >&2; exit 1; fi
          exit $overall