Arch: yip and yarr pacman+yay scripts to update like a boss

File: /usr/local/bin/yarr
USAGE: $ yarr    <-- Update the mirrors list and then update the system with yip script.

    #!/bin/bash

    # Installation:
    #     $ sudo cp ./yarr /usr/local/bin/
    #     $ sudo chmod +x /usr/local/bin/yarr

    # If reflector is not installed.
    if ! command -v reflector >/dev/null 2>&1
    then
        # NOTE: When installing Arch, the ISO's installation environment includes a copy of $ reflector to assist during install.
        #       Its just not installed to the system by default.
        echo -e "\e[94m::\e[0m Reflector could not be found. Install with: $ sudo pacman -S reflector"
        exit
    fi

    # Update /etc/pacman.d/mirrorlist with the 10 fastest HTTPS mirrors.
    sudo reflector --verbose --country "United States" --latest 10 --protocol https --sort rate --save /etc/pacman.d/mirrorlist
    echo

    # Call yip script.
    yip

File: /usr/local/bin/yip
USAGE: $ yip    <-- Update installed packages, delete downloaded packages, and purge the orphans, like a boss.

    #!/bin/bash

    # Installation:
    #     $ sudo cp ./yip /usr/local/bin/
    #     $ sudo chmod +x /usr/local/bin/yip

    free_space_check() {
        local directory=$1
        local low_space_mb=$2

        # If directory does not exist or is not a directory.
        if [[ ! -d "$directory" ]]; then
            echo -e "\e[31m::\e[0m ERROR: Directory '$directory' does not exist."
            exit 1
        fi

        # Get all space values in bytes.
        local low_space_bytes=$(awk "BEGIN {print $low_space_mb * 1024 * 1024}") # Using awk because bash will overflow: $ echo $((9999999999999 * 1024 * 1024)) # will display -7960984073710600192.
        local free_space_bytes=$(df --block-size=1 --output=avail "$directory" 2>/dev/null | tail -n1)
        local total_space_bytes=$(df --block-size=1 --output=size "$directory" 2>/dev/null | tail -n1)

        # If free space is less than low space.
        if awk -v free="$free_space_bytes" -v low="$low_space_bytes" 'BEGIN { exit !(free < low) }'; then
            local si_scalars=(1208925819614629174706176 1180591620717411303424 1152921504606846976 1125899906842624 1099511627776 1073741824 1048576 1024)
            local si_prefixes=("YiB" "ZiB" "EiB" "PiB" "TiB" "GiB" "MiB" "KiB")

            # Find the appropriate SI prefix.
            local scalar=1
            local prefix="KiB"
            for i in ${!si_scalars[@]}; do
                if awk -v space="$total_space_bytes" -v scalar="${si_scalars[$i]}" 'BEGIN { exit !(space >= scalar) }'; then
                    scalar="${si_scalars[$i]}"
                    prefix="${si_prefixes[$i]}"
                    break
                fi
            done

            # Calculate output space info.
            local free_space_scaled=$(awk -v bytes="$free_space_bytes" -v scalar="$scalar" 'BEGIN { printf "%.1f", bytes / scalar }')
            local total_space_scaled=$(awk -v bytes="$total_space_bytes" -v scalar="$scalar" 'BEGIN { printf "%.1f", bytes / scalar }')
            local used_percent=$(awk -v free="$free_space_bytes" -v total="$total_space_bytes" 'BEGIN { printf "%.f", (1 - free / total) * 100 }')

            while true; do
                # Displays disk space info like Dolphin properties window.
                echo -e "\e[31m:: WARNING: Low disk space detected. ${free_space_scaled} ${prefix} free of ${total_space_scaled} ${prefix} (${used_percent}% used) on drive '${directory}'."
                echo -e "            This can cause incomplete installations, system crashes, or render the system unbootable.\e[0m"
                echo
                read -p "Do you want to continue? [Y/N]: " response
                # Sets response to 'Y' if you didn't press Y|N, so Enter allows you to continue like it does with Yay/Pacman.
                response=${response:-Y}
                case "$response" in
                    y|Y) echo; break ;;
                    n|N) exit 1 ;; # Exit script with status 1 to indicate failure.
                    *) echo; echo "Please answer Y or N."; echo ;;
                esac
            done
        fi
    }

    # WIP low-space thresholds. Feel free to mod.
    # If paths are on the same drive then you can remove redundant checks.
    free_space_check /boot/efi 50
    free_space_check /boot     500
    free_space_check /         10240
    free_space_check "$HOME"   10240

    # Update packages including AUR.
    yay -Syyu
    # I actually use this one:
    # yay -Syyu --noconfirm

    # Remove unneeded dependencies.
    # NOTE: Strangely both [$ yes | yay -Scc] and [$ yay -Scc --noconfirm] will prompt you to remove dependencies so [yay -Ycc --noconfirm] needs to be called first to prevent that prompt from displaying.
    #
    # NOTE: The command [yay -Ycc --noconfirm] is implemented in https://github.com/Jguer/yay/blob/next/cmd.go
    #       It calls cleanDependencies(...) defined in https://github.com/Jguer/yay/blob/next/clean.go
    #       Which calls hangingPackages(...) defined in https://github.com/Jguer/yay/blob/next/query.go
    #
    # WARNING: This version will not work [$ yes | yay -Scc --noconfirm].
    #          The prompt will still be displayed to delete dependencies,
    #          Yay AUR build directory $HOME/.cache/yay/ will be purged,
    #          but no cleaning will take place in Pacman cache directory /var/cache/pacman/pkg/ and Pacman database directory /var/lib/pacman/
    #          because the --noconfirm forces the "yes |" to be ignored, resulting in the default Pacman behavior of not cleaning anything to occur.
    echo -e "\e[94m::\e[0m Remove unneeded dependencies..."
    yay -Ycc --noconfirm

    # Clean Pacman cache directory /var/cache/pacman/pkg/, Pacman database directory /var/lib/pacman/, and Yay AUR build directory $HOME/.cache/yay/.
    # If you need to downgrade or install an outdated package then you will need to download it again.
    #
    # NOTE: To just clean the Pacman directories the command is [$ yes | sudo pacman -Scc].
    # WARNING: This version doesn't do anything: [$ sudo pacman -Scc --noconfirm]
    #          SEE: https://bbs.archlinux.org/viewtopic.php?id=236186
    #          SEE: https://unix.stackexchange.com/questions/52277/pacman-option-to-assume-yes-to-every-question
    # WARNING: This command is broken as well [$ yay -Scc --noconfirm]. It will only clean Yay AUR build directory: $HOME/.cache/yay/
    echo -e "\e[94m::\e[0m Clean Pacman and Yay caches..."
    yes | yay -Scc
    echo

    # Purge the orphans.
    # NOTE: This code might be redundant because of [yay -Ycc --noconfirm]. I've yet to see it actually find an orphan.
    orphans=$(pacman -Qdtq)
    if [[ -n "$orphans" ]]; then
        echo -e "\e[94m::\e[0m Remove orphaned packages..."
        sudo pacman -Rns $orphans
    else
        echo -e "\e[94m::\e[0m No orphaned packages found..."
    fi

    # Update gvim plugins.
    # Assumes vim-plug is installed: https://github.com/junegunn/vim-plug
    echo
    echo -e "\e[94m::\e[0m Updating vim plugins..."
    # Update ~/.vim/ plugins.
    gvim +PlugUpgrade +PlugUpdate +qall
    # Update /root/.vim/ plugins.
    # NOTE: I have GVIM_ENABLE_WAYLAND=1 in my /etc/environment so gvim is resizable in Wayland.
    # -E is needed so the environment variables are available to the sudo instance of gvim.
    # -H is needed so $HOME=/root instead of ~/home/wolf (a side effect of using the -E option).
    sudo -EH gvim +PlugUpgrade +PlugUpdate +qall