Trailrunner

Trailrunner is a simple Python library for walking paths on the filesystem and executing functions for each file found. It efficiently handles large codebases by respecting project-level `.gitignore` files and leveraging a process pool for concurrent function execution. It's designed for use by linting, formatting, and other developer tools that need to find and operate on all files in a project in a predictable fashion with a minimal API. The current version is 1.4.0, and it generally sees a few releases per year, often for bug fixes or minor feature additions.