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5c4acc8ee1
Notification is sent using an OSC 777 escape sequence as described at http://known.phyks.me/2014/local-notifications-for-weechat-and-urxvt. The specific notification is crafted to match that emitted by bash when running under Fedora 22 with the "vte-profile" RPM installed. See the code for "__vte_prompt_command" starting at http://pkgs.fedoraproject.org/cgit/vte291.git/tree/vte291-command-notify.patch#n307 to see exactly what bash produces. My approach is, however, a bit more paranoid about control characters embedded in commands. Gnome-terminal 3.16 responds to this escape sequence by posting a desktop notification if the containing terminal window does not have focus. This lets the user know that a long-running background command has completed. Job notification is promoted as a Fedora 22 feature (http://fedoramagazine.org/terminal-job-notifications-in-fedora-22-workstation/), so it would be good for fish users to be benefit from it. Conversely, anyone who does not want this feature can use "functions --erase __notify_vte_command_completed" to turn it off.