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Command duration in fish shell

If you're interested in how long your commands run you might want to display the
duration of the last command in the right prompt. I've made a similar blog post for ZSH in 2013 but I'm now using the fish shell.

To make it work create the file ~/.config/fish/functions/rprompt.fish with this content:

function fish_right_prompt
if test $CMD_DURATION
# Show duration of the last command in seconds
set duration (echo "$CMD_DURATION 1000" | awk '{printf "%.3fs", $1 / $2}')
echo $duration
end
echo "😄"
end

And then source it in your ~/.config/fish/config.fish:

. ~/.config/fish/functions/rprompt.fish

Update: Adding OS X notifications

Sometimes it is nice to be notified when a long running command (> 10 sec) finishes.
But because displaying notifications all the time can get quite annoying I've limited
the notifications to be only shown for some commands and when iTerm is not in focus.

function fish_right_prompt
if test $CMD_DURATION
# Show duration of the last command
set duration (echo "$CMD_DURATION 1000" | awk '{printf "%.3fs", $1 / $2}')
echo $duration
# OS X notification when a command takes longer than notify_duration
set notify_duration 10000
set exclude_cmd "bash|less|man|more|ssh"
if begin
test $CMD_DURATION -gt $notify_duration
and echo $history[1] | grep -vqE "^($exclude_cmd).*"
end
# Only show the notification if iTerm is not focused
echo "
tell application \"System Events\"
set activeApp to name of first application process whose frontmost is true
if \"iTerm\" is not in activeApp then
display notification \"Finished in $duration\" with title \"$history[1]\"
end if
end tell
" | osascript
end
end
# Be nice :)
echo "😄"
end
© 2020 by Adrian Philipp