# File lib/guard/notifiers/notifysend.rb, line 30 def available?(silent = false) if (RbConfig::CONFIG['host_os'] =~ /linux|freebsd|openbsd|sunos|solaris/) and (not `which notify-send`.empty?) true else ::Guard::UI.error 'The :notifysend notifier runs only on Linux, FreeBSD, OpenBSD and Solaris with the libnotify-bin package installed.' unless silent false end end