# .github/workflows/slack-notify.yml
name: Slack Notification
on:
  pull_request:
    types: [opened, closed]

jobs:
  notify:
    runs-on: ubuntu-latest
    steps:
      - name: Send notification to Slack
        uses: slackapi/slack-github-action@v1.27.0
        with:
          payload: |
            {
              "text": "🔔 Pull Request *${{ github.event.pull_request.title }}* by ${{ github.actor }}\nURL: ${{ github.event.pull_request.html_url }}"
            }
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}

import os
import requests

SLACK_WEBHOOK_URL = os.getenv("SLACK_WEBHOOK_URL")

def notify_to_slack(message: str):
    payload = {"text": message}
    response = requests.post(SLACK_WEBHOOK_URL, json=payload)
    if response.status_code != 200:
        raise Exception(f"Slack notification failed: {response.text}")

if __name__ == "__main__":
    notify_to_slack("🚀 デプロイが完了しました！")

# .github/workflows/slack-notify.yml
name: Slack Notifications

on:
  pull_request:
    types: [opened, closed, reopened, ready_for_review]
  issues:
    types: [opened, closed, reopened]
  workflow_run:
    workflows: ["CI"]   # 例: 別のCIジョブの結果通知
    types:
      - completed

jobs:
  notify:
    runs-on: ubuntu-latest
    steps:
      - name: Send Slack notification
        uses: slackapi/slack-github-action@v1.27.0
        with:
          payload: |
            {
              "text": ":bell: *${{ github.event_name }}* event in <${{ github.server_url }}/${{ github.repository }}|${{ github.repository }}>",
              "attachments": [
                {
                  "color": "#36a64f",
                  "fields": [
                    {
                      "title": "Actor",
                      "value": "${{ github.actor }}",
                      "short": true
                    },
                    {
                      "title": "Action",
                      "value": "${{ github.event.action }}",
                      "short": true
                    },
                    {
                      "title": "Details",
                      "value": "<${{ github.event.pull_request.html_url || github.event.issue.html_url }}>",
                      "short": false
                    }
                  ]
                }
              ]
            }
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}

# src/example.py
def add(a, b):
    return a + b

# tests/test_example.py
from src.example import add

def test_add():
    assert add(2, 3) == 5

🔹 GitHub Actions ワークフロー
# .github/workflows/ci-slack.yml
name: CI with Slack Notifications

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

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      # 1. リポジトリをチェックアウト
      - name: Checkout code
        uses: actions/checkout@v3

      # 2. Python をセットアップ
      - name: Setup Python
        uses: actions/setup-python@v4
        with:
          python-version: 3.11

      # 3. 依存パッケージをインストール
      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install pytest

      # 4. テストを実行
      - name: Run tests
        id: pytest
        run: |
          pytest --junitxml=results.xml || echo "Tests failed"

      # 5. Slackに通知
      - name: Slack Notification
        uses: slackapi/slack-github-action@v1.27.0
        if: always()  # 成功/失敗問わず通知
        with:
          payload: |
            {
              "text": ":test_tube: *CI Result* for <${{ github.server_url }}/${{ github.repository }}|${{ github.repository }}> by ${{ github.actor }}",
              "attachments": [
                {
                  "color": "${{ job.status == 'success' && '#36a64f' || '#ff0000' }}",
                  "fields": [
                    { "title": "Branch", "value": "${{ github.ref_name }}", "short": true },
                    { "title": "Status", "value": "${{ job.status }}", "short": true },
                    { "title": "Workflow", "value": "${{ github.workflow }}", "short": true }
                  ]
                }
              ]
            }
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}

# .github/workflows/ci-slack-detailed.yml
name: CI with Slack Detailed Errors

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

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Setup Python
        uses: actions/setup-python@v4
        with:
          python-version: 3.11

      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install pytest

      # 1. pytest を実行してログを保存
      - name: Run tests
        id: pytest
        run: |
          mkdir -p test-results
          pytest --maxfail=5 --disable-warnings --junitxml=test-results/results.xml || true

      # 2. 失敗テストを抽出して Slack に送る
      - name: Extract failed tests
        id: extract
        run: |
          echo "FAILED_TESTS<<EOF" >> $GITHUB_ENV
          grep "<testcase" test-results/results.xml | grep "failure" || echo "None"
          echo "EOF" >> $GITHUB_ENV

      - name: Slack Notification
        uses: slackapi/slack-github-action@v1.27.0
        with:
          payload: |
            {
              "text": ":test_tube: *CI Result* for <${{ github.server_url }}/${{ github.repository }}|${{ github.repository }}> by ${{ github.actor }}",
              "attachments": [
                {
                  "color": "${{ job.status == 'success' && '#36a64f' || '#ff0000' }}",
                  "fields": [
                    { "title": "Branch", "value": "${{ github.ref_name }}", "short": true },
                    { "title": "Status", "value": "${{ job.status }}", "short": true },
                    { "title": "Failed Tests", "value": "${{ env.FAILED_TESTS }}" }
                  ]
                }
              ]
            }
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}

# .github/workflows/ci-slack-error-details.yml
name: CI with Detailed Test Errors to Slack

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

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      # 1. コードをチェックアウト
      - name: Checkout code
        uses: actions/checkout@v3

      # 2. Python セットアップ
      - name: Setup Python
        uses: actions/setup-python@v4
        with:
          python-version: 3.11

      # 3. 依存関係インストール
      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install pytest lxml requests

      # 4. pytest 実行＆結果を XML に出力
      - name: Run tests
        run: |
          mkdir -p test-results
          pytest --maxfail=10 --disable-warnings --junitxml=test-results/results.xml || true

      # 5. Python スクリプトで XML を解析し、Slack通知用の短い文字列に変換
      - name: Parse failed tests
        id: parse
        run: |
          python << 'EOF'
import os
from lxml import etree

xml_file = 'test-results/results.xml'
failed_tests = []

if os.path.exists(xml_file):
    tree = etree.parse(xml_file)
    for testcase in tree.xpath('//testcase[failure]'):
        name = testcase.get('name')
        classname = testcase.get('classname')
        failure_msg = testcase.find('failure').text
        failure_msg_short = (failure_msg or '').splitlines()[0]  # 1行目だけ
        failed_tests.append(f"{classname}.{name}: {failure_msg_short}")

failed_tests_str = '\n'.join(failed_tests) if failed_tests else "None"
with open(os.environ['GITHUB_ENV'], 'a') as f:
    f.write(f"FAILED_TESTS={failed_tests_str}\n")
EOF

      # 6. Slack に通知
      - name: Send Slack Notification
        uses: slackapi/slack-github-action@v1.27.0
        if: always()
        with:
          payload: |
            {
              "text": ":test_tube: *CI Result* for <${{ github.server_url }}/${{ github.repository }}|${{ github.repository }}> by ${{ github.actor }}",
              "attachments": [
                {
                  "color": "${{ job.status == 'success' && '#36a64f' || '#ff0000' }}",
                  "fields": [
                    { "title": "Branch", "value": "${{ github.ref_name }}", "short": true },
                    { "title": "Status", "value": "${{ job.status }}", "short": true },
                    { "title": "Failed Tests", "value": "${{ env.FAILED_TESTS }}" }
                  ]
                }
              ]
            }
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}