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reflex

Tool to 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 {}