[duplicate-code] Duplicate Code Analysis Report

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🔍 Duplicate Code Analysis Report

Analysis of commit 3a84ef2

Summary

This analysis identified 3 significant duplication patterns across the MCP Gateway codebase. The duplication affects critical areas including command-line flag handling, configuration management, and logger initialization, creating maintainability challenges and increasing the risk of inconsistent updates.

Detected Patterns

1. Environment Variable Default Getters in Flag Files - Severity: High - See sub-issue [duplicate-code] Duplicate Code Pattern: Environment Variable Default Getters #603

   • 3 nearly identical functions with 15-17 lines each
   • Located in internal/cmd/flags_difc.go and internal/cmd/flags_logging.go

2. Logger Initialization Boilerplate - Severity: Medium - See sub-issue #aw_g2h3i4j5k6l7

   • 3 similar initialization functions (40-66 lines each)
   • Located in internal/logger/file_logger.go, jsonl_logger.go, and markdown_logger.go

3. Flag File Structure and Init Pattern - Severity: Medium - See sub-issue #aw_h3i4j5k6l7m8

   • Repeated structural patterns across 4 flag files
   • Located in internal/cmd/flags_*.go files

Overall Impact

• Total Duplicated Lines: ~200+ lines of similar/duplicated code
• Affected Files: 7 files with significant duplication
• Maintainability Risk: High - Changes to flag handling or logger initialization require updating multiple files
• Refactoring Priority: High - Especially for Pattern Configure as a Go CLI tool #1 (environment variable getters)

Next Steps

1. Review individual pattern sub-issues for detailed analysis and specific code examples
2. Prioritize refactoring based on severity (start with Pattern Configure as a Go CLI tool #1)
3. Create implementation plan for extracting common utilities
4. Ensure tests are updated to cover refactored code

Analysis Metadata

• Analyzed Files: 61 Go files from recent commit
• Detection Method: Code pattern analysis and semantic comparison
• Commit: 3a84ef2 (chore: update gh-aw-mcpg container to v0.0.94)
• Analysis Date: 2026-02-03