github-actions

1# GitHub Actions
2 
3Automate software workflows directly in your GitHub repository with GitHub Actions.
4 
5## When to Use This Skill
6 
7Use this skill when:
8- Setting up CI/CD pipelines for GitHub repositories
9- Automating build, test, and deployment workflows
10- Creating reusable workflow components
11- Configuring self-hosted runners
12- Managing workflow secrets and variables
13- Debugging failed workflow runs
14 
15## Prerequisites
16 
17- GitHub repository with write access
18- Understanding of YAML syntax
19- For self-hosted runners: server with Docker (optional)
20 
21## Workflow File Structure
22 
23Workflows are defined in `.github/workflows/` directory:
24 
25```yaml
26name: CI Pipeline
27 
28on:
29  push:
30    branches: [main, develop]
31  pull_request:
32    branches: [main]
33 
34jobs:
35  build:
36    runs-on: ubuntu-latest
37    steps:
38      - uses: actions/checkout@v4
39      - name: Setup Node.js
40        uses: actions/setup-node@v4
41        with:
42          node-version: '20'
43          cache: 'npm'
44      - run: npm ci
45      - run: npm test
46```
47 
48## Common Triggers
49 
50### Push and Pull Request
51 
52```yaml
53on:
54  push:
55    branches: [main]
56    paths:
57      - 'src/**'
58      - 'package.json'
59  pull_request:
60    branches: [main]
61```
62 
63### Scheduled Runs
64 
65```yaml
66on:
67  schedule:
68    - cron: '0 2 * * *'  # Daily at 2 AM UTC
69```
70 
71### Manual Dispatch
72 
73```yaml
74on:
75  workflow_dispatch:
76    inputs:
77      environment:
78        description: 'Deployment environment'
79        required: true
80        default: 'staging'
81        type: choice
82…