Event Notify Test Runner
A utility for running arbitrary commands when files change. Uses kqueue(2) or inotify(7) to avoid polling.
entr was written to make rapid feedback and automated testing natural and completely ordinary.
Source Installation - BSD, Mac OS, and Linux
./configure make test make install
To see available build options run
Docker and Windows Subsystem for Linux
Incomplete inotify support on WSL and Docker for Mac can cause
entr to respond inconsistently. Since version 4.4,
entr includes a workaround: Set the environment variable
entr will confirm the workaround is enabled:
entr: broken inotify workaround enabled
Man Page Examples
Rebuild a project if source files change, limiting output to the first 20 lines:
$ find src/ | entr sh -c 'make | head -n 20'
Launch and auto-reload a node.js server:
$ ls *.js | entr -r node app.js
Clear the screen and run a query after the SQL script is updated:
$ echo my.sql | entr -cp psql -f /_
Rebuild project if a source file is modified or added to the src/ directory:
$ while sleep 0.1; do ls src/*.rb | entr -d make; done
Auto-reload a web server, or terminate if the server exits
$ ls * | entr -rz ./httpd
A release history as well as features in the upcoming release are covered in the NEWS file.