drywall 0.1.3

Polyglot AST subtree DRY analyzer. A Rust port of unclebob/dry4go, extended to Rust, JavaScript, TypeScript, and Python.

drywall

Polyglot AST subtree DRY analyzer. Detects duplicate code across files using Jaccard similarity over normalized AST fingerprints.

A Rust port of unclebob/dry4go, extended to work across Rust, JavaScript, TypeScript, and Python (dry4go is Go-only).

Install

# Rust
cargo install drywall

# Python
pip install drywall
# or, without installing:
uvx drywall ./src

# Node.js
npm install --save-dev drywall-cli
# then: npx drywall ./src, or add a package.json script

Or download the binary for your platform from the latest release:

Platform	Binary
Linux x86_64	drywall-linux-x86_64
macOS Apple Silicon	drywall-macos-aarch64
macOS Intel	drywall-macos-x86_64

# Linux
curl -sL https://github.com/gabadi/drywall/releases/latest/download/drywall-linux-x86_64 -o drywall
chmod +x ./drywall

# macOS Apple Silicon
curl -sL https://github.com/gabadi/drywall/releases/latest/download/drywall-macos-aarch64 -o drywall
chmod +x ./drywall

# macOS Intel
curl -sL https://github.com/gabadi/drywall/releases/latest/download/drywall-macos-x86_64 -o drywall
chmod +x ./drywall

The Linux binary is statically linked (musl) — no runtime dependencies.

Usage

drywall [--threshold 0.82] ./src

--threshold is the Jaccard similarity cutoff (default 0.82, same as dry4go). Pairs at or above the threshold are reported. Exit codes: 0 = no duplicates, 1 = duplicates found, 2 = bad arguments.

Use as a CI gate

Add to any project's CI pipeline:

- name: Install drywall
  run: |
    curl -sL https://github.com/gabadi/drywall/releases/latest/download/drywall-linux-x86_64 -o drywall
    chmod +x ./drywall

- name: DRY check
  run: ./drywall --threshold 0.82 ./src

--threshold sets the Jaccard similarity cutoff (default 0.82). Pairs at or above the threshold are flagged. The step fails (exit 1) if any duplicates are found.

Build from source

Requires Rust 1.96+:

cargo build --release
./target/release/drywall ./src