if not functions -q __cd_orig
    functions --copy cd __cd_orig
end

function cd --wraps=cd --description "Change directory. No args goes to git root or $HOME."
    git rev-parse --is-inside-work-tree &>/dev/null
    set -l is_git $status
    if test (count $argv) -ne 0; or not test $is_git -eq 0
        __cd_orig $argv
    else
        __cd_orig (git rev-parse --show-toplevel)
    end
end