GitHub Actions 成本优化与账单管理：从分钟数监控到预算分配

# 获取本月 Actions 使用量（Organization 级别）
curl -H "Authorization: token $GITHUB_TOKEN" \
  -H "Accept: application/vnd.github.v3+json" \
  "https://api.github.com/orgs/$ORG/settings/billing/actions"

# 返回示例：
# {
#   "total_minutes_used": 45231,
#   "total_paid_minutes_used": 15231,
#   "included_minutes": 30000,
#   "minutes_used_breakdown": {
#     "UBUNTU": 38000,
#     "MACOS": 1200,
#     "WINDOWS": 6031
#   }
# }

name: Weekly Cost Report
on:
  schedule:
    - cron: '0 9 * * 1'  # 每周一上午 9 点

jobs:
  report:
    runs-on: ubuntu-latest
    steps:
      - name: Get Actions usage
        id: usage
        run: |
          RESPONSE=$(curl -s \
            -H "Authorization: token ${{ secrets.GITHUB_ADMIN_TOKEN }}" \
            -H "Accept: application/vnd.github.v3+json" \
            "https://api.github.com/orgs/${{ github.repository_owner }}/settings/billing/actions")
          
          TOTAL=$(echo $RESPONSE | jq '.total_minutes_used')
          PAID=$(echo $RESPONSE | jq '.total_paid_minutes_used')
          UBUNTU=$(echo $RESPONSE | jq '.minutes_used_breakdown.UBUNTU')
          MACOS=$(echo $RESPONSE | jq '.minutes_used_breakdown.MACOS')
          WINDOWS=$(echo $RESPONSE | jq '.minutes_used_breakdown.WINDOWS')
          
          # 估算成本（Team 计划 $0.008/分钟 Linux）
          COST=$(echo "$PAID * 0.008" | bc)
          
          echo "total=$TOTAL" >> $GITHUB_OUTPUT
          echo "paid=$PAID" >> $GITHUB_OUTPUT
          echo "cost=$COST" >> $GITHUB_OUTPUT
          echo "ubuntu=$UBUNTU" >> $GITHUB_OUTPUT
          echo "macos=$MACOS" >> $GITHUB_OUTPUT
          echo "windows=$WINDOWS" >> $GITHUB_OUTPUT

      - name: Post to Slack
        uses: slackapi/slack-github-action@v1
        with:
          payload: |
            {
              "text": "📊 GitHub Actions 周成本报告\n\n总计使用: ${{ steps.usage.outputs.total }} 分钟\n超出额度: ${{ steps.usage.outputs.paid }} 分钟\n预估成本: $${{ steps.usage.outputs.cost }}\n\n按平台:\n• Linux: ${{ steps.usage.outputs.ubuntu }} 分钟\n• macOS: ${{ steps.usage.outputs.macos }} 分钟 (${{ steps.usage.outputs.macos }}0 Linux 等效分钟)\n• Windows: ${{ steps.usage.outputs.windows }} 分钟 (${{ steps.usage.outputs.windows }} * 2 Linux 等效分钟)"
            }
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}

strategy:
  matrix:
    os: [ubuntu-latest, macos-latest, windows-latest]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-go@v5
      
      # 交叉编译所有平台
      - run: |
          GOOS=linux GOARCH=amd64 go build -o dist/app-linux-amd64
          GOOS=darwin GOARCH=amd64 go build -o dist/app-darwin-amd64
          GOOS=darwin GOARCH=arm64 go build -o dist/app-darwin-arm64
          GOOS=windows GOARCH=amd64 go build -o dist/app-windows-amd64.exe
      
      - uses: actions/upload-artifact@v4
        with:
          name: binaries
          path: dist/

  # 仅在真正需要时进行平台原生测试
  test-cross-platform:
    needs: build
    strategy:
      matrix:
        os: [macos-latest, windows-latest]
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/download-artifact@v4
        with: { name: binaries }
      - run: ./dist/app-*  # 运行快速冒烟测试

- run: npm ci  # 每次 2 分钟

- uses: actions/cache@v4
  with:
    path: ~/.npm
    key: ${{ runner.os }}-npm-${{ hashFiles('package-lock.json') }}

- run: npm ci  # 缓存命中后 10 秒

strategy:
  max-parallel: 3  # 限制同时运行 3 个 job
  matrix:
    node: [16, 18, 20]
    os: [ubuntu-latest, windows-latest, macos-latest]
    # 3×3=9 个 job，max-parallel=3
    # 如果每个 job 10 分钟：
    # 完全并行总时间 = 10 分钟，成本 = 9 job × 10 min = 90 分钟
    # 限制后总时间 = 30 分钟，成本 = 90 分钟（相同）
    # 但如果是自托管或并发配额紧张，队列时间减少

name: Backend CI
on:
  push:
    paths:
      - 'backend/**'      # 只有 backend 目录变更才触发
      - '.github/workflows/backend-ci.yml'
  pull_request:
    paths:
      - 'backend/**'

on:
  schedule:
    # ❌ 不要选整点（竞争高峰）
    # - cron: '0 0 * * *'  # 午夜整点，大量 workflow 竞争
    
    # ✅ 错峰执行
    - cron: '23 1 * * *'   # 凌晨 1:23，竞争较少

# 获取某个仓库的 workflow 运行记录
curl -H "Authorization: token $TOKEN" \
  "https://api.github.com/repos/$ORG/$REPO/actions/runs?per_page=100" | \
  jq '.workflow_runs[] | {name, run_number, run_started_at, updated_at}'

# 在 Weekly Cost Report workflow 中
- name: Alert on high usage
  if: ${{ steps.usage.outputs.paid > 24000 }}  # 超过 $200/周
  run: |
    curl -X POST $SLACK_WEBHOOK \
      -d '{"text": "⚠️ GitHub Actions 账单预警：本周已超出 $200"}'