# reflex

> Watch a directory and rerun a command when certain files change.
> More information: <https://github.com/cespare/reflex>.

- Rebuild with `make` if any file changes:

`reflex make`

- Compile and run Go application if any `.go` file changes:

`reflex --regex='{{\.go$}}' {{go run .}}`

- Ignore a directory when watching for changes:

`reflex --inverse-regex='{{^dir/}}' {{command}}`

- Run command when reflex starts and restarts on file changes:

`reflex --start-service=true {{command}}`

- Substitute the filename that changed in:

`reflex -- echo {}`