🛡️ Security & Code Quality: Snyk, SonarCloud & CodeQL

NOTE

DevSecOps embraces Shift-Left Security — finding and remediating security vulnerabilities, architectural flaws, and technical debt the exact moment code is written and submitted in a Pull Request.

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🎯 1. The Four Continuous Audit Pillars

graph TD
    PR["📥 Open Pull Request"] --> SAST["🔍 SAST (Static Analysis)<br/>SonarCloud / CodeQL"]
    PR --> SCA["📦 SCA (Dependencies)<br/>Snyk / Dependabot"]
    PR --> Secrets["🔑 Secret Scanning<br/>GitHub Native"]
    PR --> Lint["🧹 Linters & Quality Gates"]

    SAST --> Decision{"Passed all checks?"}
    SCA --> Decision
    Secrets --> Decision
    Lint --> Decision

    Decision -- Yes --> Merge["✅ Merge Allowed"]
    Decision -- No --> Block["❌ Block with PR Decoration"]

1. SAST (Static Application Security Testing): Scans source code for logic bugs, SQL injections, XSS, and code smells (SonarCloud, CodeQL).
2. SCA (Software Composition Analysis): Scans direct and transitive dependencies for known CVEs (Snyk, Dependabot).
3. Secret Scanning: Prevents accidental commits of API tokens, certificates, and credentials.
4. Quality Gates: Automated merge blocks if test coverage decreases or technical debt increases.

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☁️ 2. SonarCloud: Quality & Quality Gates

SonarCloud provides managed continuous inspection of code quality and security.

Key Metrics Evaluated:

• Bugs: Runtime exceptions waiting to happen.
• Vulnerabilities: Direct security exposures.
• Security Hotspots: Sensitive security code requiring human review (e.g. cryptography, complex regexes).
• Code Smells: Maintainability degradations.
• Coverage: Target at least 80% coverage on new code.

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🐶 3. Snyk: Dependency & Container Security

Snyk scans third-party packages, Docker images, and Terraform/Kubernetes configurations.

Local CLI Testing:

# Install Snyk CLI
npm install -g snyk
 
# Authenticate
snyk auth
 
# Test current folder dependencies
snyk test
 
# Monitor continuous snapshots
snyk monitor
 
# Test a local Docker image
snyk container test my-app:latest

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📚 Official Documentation & References

• 🌐 Git SCM Official Documentation — Official Pro Git book and command manual.
• 🐙 GitHub Docs — Official guides on GitHub Actions, PRs, Security, and REST/GraphQL APIs.
• 📦 Conventional Commits 1.0.0 Specification — Official specification.
• 🛡️ SonarCloud Documentation & Snyk Docs — Official SAST & SCA security docs.

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🔗 Second Brain Links

• Combine security checks into your pipeline in GitHub Actions & CI/CD.
• Enforce pull request gating in Workflows: Issues, PRs & Governance.
• Back to the main overview in GitHub & Git Ecosystem.