Add the output of the following command to your preferred completions file(e.g. ~/.config/bash_completions.d/stack).
stack --bash-completion-script $(which stack)You may need to source this.
Add the output of the following command to your preferred completions file(e.g. ~/.config/zsh/completions/_stack).
stack --zsh-completion-script $(which stack)You won't need to source this, but do update your fpath:
fpath=($HOME/.config/zsh/completions $fpath)autoload -U compinit && compinitAdd the output of the following command to your preferred completions file(e.g. ~/.config/fish/completions/stack.fish).
stack --fish-completion-script $(which stack)