GitHub Actions で ML プロジェクトに CI/CD を ─ 30 分入門

name: CI

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Setup Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.12'
          cache: 'pip'

      - name: Install
        run: pip install -r requirements.txt -r requirements-dev.txt

      - name: Lint
        run: ruff check .

      - name: Type check
        run: mypy src

      - name: Test
        run: pytest -v --cov=src

name: Train Model

on:
  push:
    paths:
      - 'data/**'
      - 'src/train.py'

jobs:
  train:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Setup Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.12'

      - name: Install
        run: pip install -r requirements.txt

      - name: Pull data with DVC
        env:
          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
        run: dvc pull

      - name: Train
        run: python src/train.py

      - name: Evaluate
        run: |
          python src/evaluate.py --threshold 0.85

      - name: Upload model
        uses: actions/upload-artifact@v4
        with:
          name: model
          path: model.pkl

on:
  schedule:
    - cron: '0 9 * * 1'  # UTC 9:00 月曜 = 日本 18:00 月曜

name: Deploy to Vercel

on:
  push:
    branches: [main]

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: amondnet/vercel-action@v25
        with:
          vercel-token: ${{ secrets.VERCEL_TOKEN }}
          vercel-org-id: ${{ secrets.ORG_ID }}
          vercel-project-id: ${{ secrets.PROJECT_ID }}
          vercel-args: '--prod'

      - name: Comment metrics
        if: github.event_name == 'pull_request'
        uses: actions/github-script@v7
        with:
          script: |
            const fs = require('fs');
            const metrics = JSON.parse(fs.readFileSync('metrics.json'));
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: `## 📊 評価結果\n\n- Accuracy: ${metrics.accuracy}\n- F1: ${metrics.f1}`,
            });