Command line file watch

My scenario is that I would like to do some tasks or commands if a file in the directory changed. I have come across this little command (fswatch) which saved me lots of development time.

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Here is the command which helped me a lot

fswatch -d <directory> | (while read; do <command>; done)

Just replace the directory and the command to execute in the above command. I have tired only in mac but as per the docs it would support other platforms also

Here you could find documentation regarding the fswatch https://github.com/emcrisostomo/fswatch