How to automatically run a command when directory updates?

1. entr

   1 5 619 5.6 C

   A utility for running arbitrary commands when files change. Uses kqueue(2) or inotify(7) to avoid polling. entr responds to file system events by executing command line arguments or by writing to a FIFO. entr was written to provide to make rapid feedback and automated testing natural and completely ordinary. (by clibs)

   

   entr is what I usually reach for when I want to monitor a directory or a list of files and then perform some action on them when changes occur

2. SaaSHub

   www.saashub.com featured

   SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

   

3. watchexec

   2 24 7,018 8.6 Rust

   Executes commands in response to file modifications

   

   I prefer watchexec as it's cross-platform.

4. entr

   3 57 5,599 6.0 C

   Run arbitrary commands when files change

   

   FYI that project was last updated Dec 30, 2014. I would stick with the currently maintained repo from the original author.

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