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{ pkgs, ... }:
pkgs.writeDashBin "untilport" ''
set -euf
usage() {
echo 'untiport $target $port'
echo 'Sleeps until the destinated port is reachable.'
echo 'ex: untilport google.de 80 && echo "google is now reachable"'
}
if [ $# -ne 2 ]; then
usage
else
until ${pkgs.netcat-openbsd}/bin/nc -z "$@"; do sleep 1; done
fi
''
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