How to automatically run a command when directory updates?

1. entr

   1 5 609 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. InfluxDB

   www.influxdata.com featured

   InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.

   

3. watchexec

   2 21 6,148 9.0 Rust

   Executes commands in response to file modifications

   

   I prefer watchexec as it's cross-platform.

4. entr

   3 54 5,134 6.2 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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