entr is a utility that runs arbitrary commands when files change.
This command-line tool uses kqueue or inotify to avoid polling. entr was written to facilitate rapid feedback on the command line.
This is free and open source software.
Examples of commands:
Rebuild a project if source files change, limiting output to the first 20 lines:
$ find src/ | entr -s '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
Website: github.com/eradman/entr
Support:
Developer: Eric Radman
License: ISC-style License
entr is written in C. Learn C with our recommended free books and free tutorials.
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