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fswatch

A cross-platform file change monitor.

More information.

Run a Bash command on file creation, update or deletion:

fswatch {path/to/file} | xargs -n 1 {bash_command}

Watch one or more files and/or directories:

fswatch {path/to/file} {path/to/directory} {path/to/another_directory/**/*.js} | xargs -n 1 {bash_command}

Print the absolute paths of the changed files:

fswatch {path/to/directory} | xargs -n 1 -I {} echo {}

Filter by event type:

fswatch --event {Updated|Deleted|Created} {path/to/directory} | xargs -n 1 {bash_command}

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This work is licensed under the Creative Commons Attribution 4.0 International License (CC-BY).

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