06. Enterprise Branching: Trunk-Based Development vs GitFlow vs Feature Flag Architecture • Git, System Design & Web Security (OWASP Top 10) • Rishabh Ki Kaksha

Git, System Design & Web Security (OWASP Top 10) › 06. Enterprise Branching: Trunk-Based Development vs GitFlow vs Feature Flag Architecture

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Course Syllabus

Module 1: Git Internals, Plumbing Commands & DAG Graph Architecture

01. Git Internals: Blobs, Trees, Commits & Annotated Tags (The .git Directory Anatomy) 02. Git DAG (Directed Acyclic Graph) & Plumbing Commands (cat-file, hash-object, write-tree) 03. Git Three Trees Architecture: Working Directory, Staging Index & HEAD

Part 1: Git Mastery, Security Defense & Caching

Module 2: Advanced Branching Strategies & Disaster Recovery

04. Advanced Rebasing: Interactive Rebase (squash, edit, fixup) vs Merge 05. Git Disaster Recovery: git reflog, Cherry-Pick & Recovering Deleted Commits/Branches 06. Enterprise Branching: Trunk-Based Development vs GitFlow vs Feature Flag Architecture

Module 3: Web Application Security: OWASP Top 10 Defenses

07. OWASP #1 & #3: SQL Injection (SQLi) & Server-Side Request Forgery (SSRF) Hardening 08. Cross-Site Scripting (XSS): Stored, Reflected, DOM-based & Content Security Policy (CSP) 09. CSRF vs Cross-Origin Traps: SameSite Cookies, Anti-CSRF Tokens & CORS Preflight Rules 10. Broken Object-Level Authorization (BOLA/IDOR) & Role-Based Access Control (RBAC/ABAC)

Module 4: Cryptography, PKI, SSL/TLS & Mutual Auth (mTLS)

11. Asymmetric Cryptography (RSA vs ECC) & Digital Signatures with GPG Keys 12. Public Key Infrastructure (PKI), TLS 1.3 Handshake & Let's Encrypt Automation 13. Mutual TLS (mTLS) for Zero-Trust Service-to-Service Communication

Module 5: DevSecOps, Secret Scanning & Zero-Trust Security Architecture

14. Automated Secret Scanning (Gitleaks, Trufflehog) & Git Pre-Commit Hooks 15. Software Supply Chain Security: Dependabot, SBOM (Software Bill of Materials) & Signed Commits 16. Enterprise Zero-Trust Architecture: Cloud IAM, Bastion Hosts & WireGuard VPN Networks

Interactive Lesson Studio

# 06. Enterprise Branching: Trunk-Based Development vs GitFlow vs Feature Flag Architecture

> Git & Web Security Notes by Rishabh - Topic 06

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### 1. The Branching Evolution: GitFlow vs Trunk-Based 🌳

*   **GitFlow (Legacy Waterfall):** Multiple long-lived branches (`master`, `develop`, `release/*`, `hotfix/*`, `feature/*`).
    *   *Problem:* Massive Merge Hell, slow release cycles (Months), integration friction.
*   **Trunk-Based Development (Big Tech Standard - Google, Meta, Netflix 🚀):** Saare engineers **single `main` (trunk) branch par daily short-lived branches merge karte hain!**

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### 2. Feature Flags (Decoupling Deployment from Release 🚩)

Trunk-based development me unfinished incomplete code bhi `main` branch me merge hota hai — **Feature Flag** ke piche hide karke:

```typescript
import { isFeatureEnabled } from "@/lib/featureFlags";

export async function CheckoutButton({ user }: { user: User }) {
    // 🚩 Feature Flag Gate:
    const showNewAIOneClickCheckout = await isFeatureEnabled("ai_checkout_v2", user);

if (showNewAIOneClickCheckout) {
        return <AIOneClickCheckoutModal />;
    }

return <StandardStripeCheckoutButton />;
}
```

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### 3. Master Comparison Matrix

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### 4. Interview Ke 3 Sawal Is Topic Se

1. **Trunk-Based development me broken builds se kaise bacha jata hai?** -> Strict automated CI pipelines (Linters, Unit Tests, Integration Tests) jo PR merge hone se pehle green hona mandatory hoti hain.
2. **Canary Deployment aur Feature Flags me kya connection hai?** -> Feature flags ke zariye naya feature pehle 1% users (Internal employees) ko expose kiya jata hai, metrics monitor karke 10%, 50%, fir 100% rollout kiya jata hai.
3. **Branch by Abstraction pattern kab use hota hai?** -> Purani monolithic subsystem (jaise legacy authentication) ko zero-downtime me naye microservice se replace karne ke liye abstraction layer ke piche gradual migration karna.

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**Next Topic:** 07. OWASP #1 & #3: SQL Injection (SQLi) & Server-Side Request Forgery (SSRF) Hardening

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