Guix

watchexec is a simple, standalone tool that watches a path and runs a command whenever it detects modifications.

Example use cases:

• Automatically run unit tests

• Run linters/syntax checkers

Features:

• Coalesces multiple filesystem events into one, for editors that use swap/backup files during saving

• By default, uses .gitignore and .ignore to determine which files to ignore notifications for

• Supports watching files with a specific extension

• Supports filtering/ignoring events based on glob patterns

• Launches child processes in a new process group

• Sets environment variables that allow the executed program to learn the details of how it was triggered.