entr (Event Notify Test Runner)

A utility for running arbitrary commands when files change.

Usage

entr takes a list of filenames from standard input and executes the utility specified as the first argument.

Syntax

<file_listing_command> | entr <utility> [arguments]

Options

• -c: Clear the screen before invoking the utility.
• -r: Reload a persistent child process (e.g., a server).
• -s: Evaluate the first argument using the interpreter specified by SHELL.

Examples

Rebuild project when sources change:

find src/ -name "*.c" | entr make

Run tests when JS files change:

git ls-files | grep '\.js

Auto-reload a Node server:
ls *.js | entr -r node app.js

Agent Notes
entr blocks the terminal. When using it as an agent:
Use process tool to run it in the background if you need to do other things.
Or use it for a quick "watch mode" session where you intend to monitor output for a while.
 | entr npm test

Auto-reload a Node server:
__CODE_BLOCK_3__

Agent Notes

__INLINE_CODE_5__ blocks the terminal. When using it as an agent:

Use __INLINE_CODE_6__ tool to run it in the background if you need to do other things.

Or use it for a quick "watch mode" session where you intend to monitor output for a while.