bangbang-fish/bangbang.fish

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Fish
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function bangbang --on-event fish_preexec
set -l command $argv
set -l last_command (history --max 1)
set -l new_command (echo $command | sed -e "s/\!\!/$last_command/g")
# TODO: Figure out how to replace the current command and run that instead
echo "*** New command: $new_command ***"
end