Arid is a command-line tool that detects duplicated source code in Python projects.
It provides a focused alternative to Pylint’s R0801 duplicate-code checker and is intended to complement broader tools such as Ruff. Arid analyses Python syntax rather than simply comparing raw text, allowing it to identify duplicate blocks while retaining accurate locations in the original source. It can be used interactively during development or incorporated into automated quality checks.
This is free and open source software.
Key Features
- Detects duplicate blocks across different files and within the same file.
- Can ignore comments, docstrings, imports and function signatures during normalization.
- Supports configurable minimum duplicate lengths and path exclusions.
- Reads project configuration from
pyproject.toml. - Offers text, JSON, Markdown and SARIF output formats.
- Supports baselines for accepting existing duplication while identifying newly introduced duplicate code.
- Provides focused reporting while retaining whole-project duplicate detection.
- Supports source-level suppression regions together with auditing for stale suppressions.
- Can produce multiple reports from a single analysis run.
- Provides summary metrics, breakdowns and duplicate-code hotspots.
- Supports parallel file preparation with configurable worker counts.
- Can continue processing independent files after parsing or reading errors with its keep-going mode.
Website: github.com/sponge-b0b/arid
Support:
Developer: sponge-b0b
License: MIT License or Apache License 2.0
Arid is written in Rust. Learn Rust with our recommended free books and free tutorials.
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