A plugin for the Z shell (on OS X) that posts desktop notifications when a command terminates with a non-zero exit status or when it took more than 30 seconds to complete, if the terminal application is in the background (or the command's terminal tab is inactive).
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Either Terminal.app or iTerm2.
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terminal-notifier.app is required for posting to Mountain Lion's Notification Center
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growlnotify is required for posting to Growl in previous versions of Mac OS X.
Just source notify.plugin.zsh.
While notifications about failed commands are always posted, notifications for successful commands are posted only if they took at least 30 seconds to complete. To change the timeout set the NOTIFY_COMMAND_COMPLETE_TIMEOUT environment variable to a different value in seconds.
Also, the plugin assumes that both terminal-notifier and growlnotify are
installed in /usr/local/bin. You can change these defaults by setting the
$SYS_NOTIFIER or $GROWL_NOTIFIER environment variables.