GitHub Enterprise Migration: 3000+ Repositories Automated

🚀 From Chaos to Control: Migrating 3000+ Repositories to GitHub Enterprise One of the most challenging and rewarding DevOps projects I worked on was migrating 3000+ repositories from Bitbucket to GitHub Enterprise. At this scale, it’s never just a “repo copy”. We faced common enterprise challenges: ❌ No centralized repo visibility ❌ Inconsistent permissions ❌ Unknown tech stacks ❌ No standardized CI/CD ❌ Risk of data inconsistency Instead of relying on expensive tools, I took an automation-first approach. 🔍 Pre-Migration Automated repo inventory & permission mapping Identified tech stacks (Maven, npm, Yarn) Analyzed branches, commits, tags, default branches ⚙️ Migration Bulk migration using custom Bash automation Standardized repositories Automated master → main transition ✅ Post-Migration Validated branches, commits, tags across systems Built automated validation reports 🚀 Platform Standardization Reusable GitHub Actions workflows (Maven, Gradle, npm, Yarn) CODEOWNERS implementation Branch protection & deployment rules GitHub teams & access control 📊 Impact ✔ 3000+ repositories migrated successfully ✔ Significant reduction in manual effort ✔ Improved governance, security, and developer experience ✔ Standardized CI/CD across teams 👉 Key takeaway: Automation + standardization are critical at enterprise scale #DevOps #DevSecOps #GitHub #Automation #PlatformEngineering #Cloud #SRE #Migration #GitHubEnterprise #SourceControl

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