fish-shell/share/functions/__fish_prepend_sudo.fish

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function __fish_prepend_sudo -d "Prepend 'sudo ' to the beginning of the current commandline"
set -l cmd (commandline -boc)
if test "$cmd[1]" != "sudo"
commandline -C 0
commandline -i "sudo "
commandline -f end-of-line
end
end