DRY
Duplicate Detection + Refactor Assistant for VS Code
Catch repeated code while you write, then refactor it in one click.
Overview
DRY is a VS Code extension that scans your workspace for duplicate or near-duplicate code blocks across JS/TS files.
It raises duplicates as native diagnostics in the editor and Problems panel, then offers Quick Fix actions to extract repetition into reusable code.
If copy-paste creeps in, DRY shows where it is and helps you clean it up fast.
Features
- Duplicate block detection across
.js, .jsx, .ts, .tsx
- Exact duplicate matching
- Normalized structure matching (ignores comments, literals, and identifier names)
- Problems panel diagnostics with related duplicate links
- Status bar DRY indicator (click opens Quick Options)
- Quick Fix actions:
DRY: Extract duplicate to function for same-file exact duplicatesDRY: Move duplicate to shared util for cross-file exact duplicates
- Sidebar
DRY Report with:
- Project DRY score
- Top duplicate clusters
- Duplication hotspots by file
Commands
Open Command Palette and run:
DRY: Scan Workspace for DuplicatesDRY: Extract Duplicate to FunctionDRY: Move Duplicate to Shared UtilDRY: Open Settings UIDRY: Quick OptionsDRY: Reset Settings
Configuration
DRY settings are available in VS Code Settings:
dry.minLines - Minimum block size to consider as duplicatedry.maxLines - Maximum block size scanned per windowdry.enableNormalizedDetection - Enable near-duplicate structural matchingdry.excludeGlob - Files/folders excluded from scan
Use Case
DRY is useful when you:
- Copy fetch/validation/error-handling logic across files
- Repeat similar JSX sections with small prop/text changes
- Duplicate utility logic in multiple modules
- Want abstraction opportunities surfaced before CI or review
Press F5 in VS Code to run the extension in Extension Development Host.
Notes
- Refactor quick fixes are intentionally conservative in MVP.
- Auto-refactor is enabled only for exact duplicate clusters.
- Normalized clusters are reported for awareness and manual follow-up.
- Settings UI includes quick actions for save, reset defaults, and instant scan.
License
MIT License © Toufiq Hasan Kiron
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