Run commands when paths change.
npm install -g watchy
and you should have the
watchy command available!
Usage: watchy [options] -- command arg1 arg2... Options: -h, --help output usage information -V, --version output the version number -w, --watch [paths] rerun the command when [paths] change -i, --ignore [regex] [default /\.] ignore changes to paths matching [regex] -k, --keep-alive restart on exit, useful for servers -W, --wait [sec] time after SIGTERM to SIGKILL -s, --silent be quieter, only output errors -n, --no-color disable colored output -S, --no-init-spawn prevent spawn when the watcher is created -r, --restart [string] [default rs] enter this command to manually restart the process. Set to - to disable. -p, --use-polling slower, but useful when watching over NFS
# The simple casewatchy -w lib -- say "The lib directory changed."# Piping works as wellwatchy -w styles -- bash -c "lessc styles/main.less | autoprefixer -o .tmp/styles/main.css"# Keep a process alive, restarting it as soon as it exits or "server.js"# changes.watchy -kw server.js -- node server.js# Watch every file except dotfiles, the node_modules folder, and JSON files.# NOTE: Listen to as few files as possible for better performance.watchy -w . -i '/\.|/node_modules|\.json$' -- node server.js# Tick tock!watchy -ks -- bash -c 'date && sleep 1'# Tick tock (annoying version)!watchy -ks -- bash -c 'say "In case you were wondering, it is `date`" && sleep 5'# $EVENT and $FILE are passed to the process from chokidar (thanks @remy).watchy -w . -- bash -c 'echo $EVENT $FILE'# => change /Users/casey/projects/watchy/README.md
Note: If you're using
watchyfor help with preprocessing, I'd recommend checking out my cogs project that is highly optimized for that case with in-memory processed file caching, directives, AMD support, and much more.
watchy will send
SIGTERM to the running process after a change and wait for it to exit gracefully. By sending the
--wait|-W n option, you can tell
watchy to forcefully
SIGKILL the process after
n seconds. In general, you should try to clean up connections in your processes like so: