🏗️ Pipeline Architecture

🎯 Por Qué CI/CD

╔═══════════════════════════════════════════════════════════════════════════╗ ║ Sin CI/CD │ Con CI/CD ║ ╠══════════════════════════════╪════════════════════════════════════════════╣ ║ Manual builds │ Automated builds ║ ║ "Works on my machine" │ Reproducible everywhere ║ ║ Slow feedback (hours/days) │ Instant feedback (minutes) ║ ║ High error rate │ Catch bugs early ║ ║ Deployment fear │ Deploy with confidence ║ ║ Inconsistent environments │ Standardized build environments ║ ║ Hard to reproduce bugs │ Every commit tested identically ║ ║ Manual testing burden │ Automated test suites ║ ╚═══════════════════════════════════════════════════════════════════════════╝

Beneficios Específicos para Audio Development

1. Multi-Platform Testing Automático
2. Build en Windows, macOS, Linux simultáneamente

3. Valida cada commit en todos los DAWs soportados

4. Artifact Management

5. Cada build genera instaladores listos
6. Histórico de versiones automático

7. Rollback fácil a versiones anteriores

8. Quality Assurance

9. Tests de audio reproducibles
10. Validación de latencia/performance

11. Detección de audio glitches

12. Code Signing Automatizado

13. Windows: Authenticode
14. macOS: Notarization
15. No más "unsigned developer" warnings

🔧 Tool Selection

GitHub Actions (Primary - Recommended)

✅ Pros: - Integrated with GitHub (no setup overhead) - Free for public repos (2000 minutes/month private) - Large marketplace (1000+ actions) - Good Windows support (native runners) - Matrix builds (test multiple configs) - Self-hosted runners option

❌ Cons: - Limited macOS minutes (costly) - Runner customization limited (hosted) - Vendor lock-in (GitHub-specific syntax)

Ideal para: - Open source projects - Small/medium teams - Repos already on GitHub

GitLab CI (Alternative)

✅ Pros: - Self-hosted option (free unlimited) - Better Docker integration - More flexible (DAG pipelines) - Kubernetes native - Artifact management built-in

❌ Cons: - More complex setup - Smaller ecosystem - Windows support weaker

Ideal para: - Self-hosted infrastructure - Enterprise with strict control - Docker-heavy workflows

Jenkins (Legacy/Enterprise)

✅ Pros: - Maximum customization - Self-hosted control - Extensive plugin ecosystem (1800+) - Works with any VCS

❌ Cons: - More maintenance burden - Security updates required - Complex UI/UX - Groovy DSL learning curve

Ideal para: - Legacy infrastructure - Complex enterprise builds - On-premise requirements - Multi-VCS support needed

📊 Flow Conceptual

┌────────────────────────────────────────────────────────────────────────┐
│ DESARROLLO                                                             │
└────────────────────────────────────────────────────────────────────────┘
    Developer writes code
           ↓
    [Local Testing] (Optional but recommended)
           ↓
    git commit -m "Add feature X"
    git push origin feature-branch

┌────────────────────────────────────────────────────────────────────────┐
│ TRIGGER                                                                │
└────────────────────────────────────────────────────────────────────────┘
    Git Hook triggers webhook
           ↓
    CI Server receives event
           ↓
    Pipeline config loaded (.github/workflows/*.yml)

┌────────────────────────────────────────────────────────────────────────┐
│ BUILD STAGE                                                            │
└────────────────────────────────────────────────────────────────────────┘
    [Checkout Code]
           ↓
    [Setup Environment]
      - Install dependencies
      - Configure toolchains
      - Setup audio drivers (if needed)
           ↓
    [Configure Build]
      - CMake configure
      - Set build type (Release/Debug)
           ↓
    [Compile]
      - CMake build
      - Multi-core compilation
           ↓
    [Code Sign] (if applicable)
      - Windows: SignTool
      - macOS: codesign + notarize

┌────────────────────────────────────────────────────────────────────────┐
│ TEST STAGE                                                             │
└────────────────────────────────────────────────────────────────────────┘
    [Unit Tests]
      - CTest execution
      - Fast feedback (< 5 min)
           ↓
    [Integration Tests]
      - Plugin validation
      - DAW compatibility checks
           ↓
    [Performance Tests]
      - Latency benchmarks
      - CPU usage validation
           ↓
    [Audio Tests]
      - Audio output validation
      - FFT analysis

┌────────────────────────────────────────────────────────────────────────┐
│ PACKAGE STAGE                                                          │
└────────────────────────────────────────────────────────────────────────┘
    [Create Installers]
      - Windows: NSIS/WiX MSI
      - macOS: PKG
      - Linux: DEB/RPM
           ↓
    [Upload Artifacts]
      - Store in CI system
      - Upload to S3/CDN (if production)
           ↓
    [Generate Release Notes]
      - Changelog extraction
      - Version tagging

┌────────────────────────────────────────────────────────────────────────┐
│ DEPLOY STAGE (Optional - Manual Gate)                                 │
└────────────────────────────────────────────────────────────────────────┘
    [Deploy to Staging]
           ↓
    [Manual Approval] (if production)
           ↓
    [Deploy to Production]
      - Update download links
      - Notify users
      - Update documentation

┌────────────────────────────────────────────────────────────────────────┐
│ NOTIFICATION                                                           │
└────────────────────────────────────────────────────────────────────────┘
    [Success]
      - GitHub PR comment: ✅ "Build passed"
      - Slack notification
      - Email (optional)

    [Failure]
      - GitHub PR comment: ❌ "Build failed at [stage]"
      - Slack alert
      - Email to developer

🎯 Responsabilidades

INFRA (Este Módulo) - Infrastructure as Code

QUÉ contiene: - ✅ Pipeline templates (YAML/Groovy) - ✅ Runner setup scripts - ✅ Hook configuration templates - ✅ Documentation

QUÉ NO contiene: - ❌ Implementaciones específicas de build - ❌ Test execution logic - ❌ Deployment scripts (esos van en módulos)

Analogía:

INFRA = Orquesta sin partituras
Módulos = Partituras + músicos

Módulos Específicos - Implementations

QUÉ contiene: - ✅ Workflow files customizados (.github/workflows/build.yml) - ✅ Build scripts (build.sh, build.ps1) - ✅ Test execution (run_tests.sh) - ✅ Deployment logic (deploy.sh) - ✅ Module-specific configs

Ejemplo estructura:

audio-lab/
├── 2 - FOUNDATION/
│   └── 03_INFRA/
│       └── 03_06_ci_cd_automation/  ← Templates y setup
│           ├── 03_05_00_pipeline_templates/
│           ├── 03_05_01_runner_configuration/
│           └── 03_05_03_documentation/
│
└── 3 - MODULES/
    └── audio-processing/
        ├── .github/
        │   └── workflows/
        │       └── build.yml  ← Copied from template, customized
        ├── scripts/
        │   ├── build.sh
        │   └── run_tests.sh
        └── CMakeLists.txt

🔀 Pipeline Variants

1. Feature Branch Pipeline

Trigger: Push to feature branch, PR opened

on:
  push:
    branches-ignore: [main, develop]
  pull_request:

jobs:
  - quick_build:  # Fast feedback
      - Compile Debug build
      - Run unit tests only
      - Static analysis

Goal: Fast feedback (< 10 min)

2. Main Branch Pipeline

Trigger: Merge to main/develop

on:
  push:
    branches: [main, develop]

jobs:
  - full_build:
      - Multi-platform builds (Win, Mac, Linux)
      - All tests (unit + integration)
      - Performance benchmarks
      - Package installers
      - Upload artifacts

Goal: Comprehensive validation (< 30 min)

3. Release Pipeline

Trigger: Tag push (v*..)

on:
  push:
    tags:
      - 'v*.*.*'

jobs:
  - release_build:
      - Production builds (all platforms)
      - Code signing + notarization
      - Full test suite
      - Create installers
      - Deploy to CDN
      - Create GitHub Release
      - Send notifications

Goal: Production-ready artifacts

4. Nightly Pipeline

Trigger: Scheduled (cron)

on:
  schedule:
    - cron: '0 2 * * *'  # 2 AM daily

jobs:
  - nightly_tests:
      - Extended tests (long-running)
      - Memory leak detection
      - Performance regression
      - Compatibility matrix
      - Dependency updates check

Goal: Deep validation

🏛️ Architecture Decisions

Decision 1: Monorepo vs Multi-Repo

AudioLab: Monorepo

Rationale: - Shared dependencies (core, testing framework) - Atomic commits across modules - Easier refactoring - Single CI config

Trade-off: - Longer CI times (mitigated with path filters)

Decision 2: Self-Hosted vs Cloud Runners

AudioLab: Hybrid

Cloud Runners (GitHub-hosted): - Linux builds (fast, cheap) - Windows builds (basic)

Self-Hosted: - macOS builds (expensive in cloud) - Audio hardware testing (requires real devices) - GPU-accelerated tests

Decision 3: Artifact Storage

AudioLab: GitHub Releases + S3

GitHub Releases: - Official releases - Public download links - Changelog integration

S3: - Nightly builds - Internal testing - CDN distribution

Decision 4: Test Strategy

AudioLab: Pyramid

      /\
     /  \    E2E Tests (slow, few)
    /────\
   /      \  Integration Tests (medium)
  /────────\
 /          \ Unit Tests (fast, many)
/────────────\

CI Distribution: - PR builds: Unit tests only - Main builds: Unit + Integration - Release builds: All tests

📊 Metrics & Monitoring

Key Metrics

Metric	Target	Measured How
Build Time	< 15 min (PR), < 30 min (main)	CI duration
Test Pass Rate	> 95%	Test results
Mean Time to Feedback	< 10 min	Push → notification
Pipeline Success Rate	> 90%	Successful / Total
Deployment Frequency	Weekly (main), On-demand (hotfix)	Release cadence

Monitoring Dashboard

Track in CI/CD analytics: - Build duration trends - Flaky test detection - Resource usage (CPU, RAM) - Artifact sizes - Deployment success rates

🔒 Security Considerations

1. Secrets Management

❌ NEVER in code:

env:
  API_KEY: "sk_live_12345"  # DANGER!

✅ Use secrets:

env:
  API_KEY: ${{ secrets.API_KEY }}

2. PR Security

Untrusted PRs:

on:
  pull_request_target:  # Runs with repo secrets
    types: [labeled]

jobs:
  build:
    if: contains(github.event.pull_request.labels.*.name, 'safe-to-test')

Rationale: Prevent secrets leak via malicious PRs

3. Artifact Signing

All artifacts must be signed: - Windows: Authenticode - macOS: codesign + notarization - Linux: GPG signatures

4. Dependency Scanning

- name: Scan Dependencies
  run: |
    npm audit
    safety check  # Python
    cargo audit   # Rust

🔗 Related Documents

• ../03_05_00_pipeline_templates/TEMPLATE_PHILOSOPHY.md - Template design
• ../03_05_01_runner_configuration/RUNNER_SETUP.md - Runner configuration
• ../03_05_02_hooks_integration/HOOKS_ARCHITECTURE.md - Git hooks
• SETUP_GUIDE.md - Step-by-step setup
• ../../03_07_security_infrastructure/03_07_01_secrets_management/ - Secrets management