nwiizo Similarity - Code Similarity Analysis
Execution Steps
- Run
similarity-rsto detect code similarities - Analyze detected duplicates (95%+: immediate, 85-95%: review)
- Create refactoring plan
Commands
# Basic scan
similarity-rs ./src
# With threshold
similarity-rs ./src --threshold 0.85
# Skip test functions
similarity-rs ./src --skip-test
# Show code in output
similarity-rs ./src --print
# Strict detection (95%+)
similarity-rs ./src --threshold 0.95 --skip-test
# Include type similarity
similarity-rs ./src --experimental-types
# CI integration
similarity-rs ./src --threshold 0.95 --skip-test --fail-on-duplicates
Options
| Option | Description | Default |
|---|---|---|
-t, --threshold |
Similarity threshold (0.0-1.0) | 0.85 |
-m, --min-lines |
Minimum lines | 3 |
--min-tokens |
Minimum tokens | 30 |
-p, --print |
Show code in output | - |
--skip-test |
Skip test functions | - |
--exclude |
Exclude directories | - |
--experimental-types |
Check type similarity | - |
--fail-on-duplicates |
Exit 1 if duplicates found | - |
Interpretation
| Similarity | Category | Action |
|---|---|---|
| 95%+ | Near-exact duplicate | Extract to common function |
| 85-95% | Structural similarity | Consider generics/traits |
| < 85% | Possible false positive | Review manually |
Workflow with cargo-coupling
# 1. Detect similar code
similarity-rs ./src --threshold 0.85 --skip-test
# 2. Check coupling impact
cargo run -- coupling ./src
# 3. Visualize in Web UI
cargo run -- coupling --web ./src
Recommended Workflow
- Initial scan:
similarity-rs . --threshold 0.8 --skip-test - Detailed analysis:
similarity-rs ./src --threshold 0.95 --print - Type check:
similarity-rs ./src --experimental-types --threshold 0.85