An improved sudo command for fish shell.

Enter a superuser shell with a single word.
No fiddling with environment variables or having to type sudo fish.
Just type sudo and press enter!

sudo

Press CTRL+S to toggle between a sudo and non-sudo command.
One of the most convenient features of bash is the sudo !! substitution.
While fish may not support !!, it can do one better with key bindings.

If you run a command and find out you need to run it as a superuser, simply press UP and CTRL+S to get that command with the word sudo in front of it.

apt-get update       # No permission.
sudo apt-get update  # After pressing UP and CTRL+S.

With fisher:

fisher install eth-p/fish-plugin-sudo

The Ctrl+S hotkey is not added by default. In order to bind the hotkey, add the following to your config.fish file:

bind \cs '__ethp_commandline_toggle_sudo.fish'