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tldr/pages/common/watchman.md

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# watchman
> A service that watches files, and triggers actions when changes occur.
> More information: <https://facebook.github.io/watchman/docs/cli-options>.
- Start watching a directory for changes:
`watchman watch {{path/to/directory}}`
- Add a trigger to run a command when files with a specified filename pattern in a watched directory change:
`watchman -- trigger {{path/to/watched_directory}} {{trigger_name}} '{{pattern}}' -- {{command}}`
- List all watched directories:
`watchman watch-list`
- Delete a watch on a directory:
`watchman watch-del {{path/to/watched_directory}}`
- List all triggers on a watched directory:
`watchman trigger-list {{path/to/watched_directory}}`
- Delete a trigger from a watched directory:
`watchman trigger-del {{path/to/watched_directory}} {{trigger_name}}`