Update Brave browser on a Void Linux system (makes use of xdeb tool and Brave Debian package releases).

update-brave-void.sh

#!/usr/bin/env bash
# Update Brave browser on a Void system.

install_latest_brave_deb() {
    # Get machine architecture.
    local arch
    arch=$(uname -m)
    if [ "$arch" == "x86_64" ]; then
        arch="amd64"
    elif [ "$arch" == "aarch64" ]; then
        arch="arm64"
    fi

    # Download latest Brave debian package.
    echo "Downloading latest stable version of Brave..."
    wget "https://github.com/brave/brave-browser/releases/download/${2}/brave-browser_${1}_${arch}.deb"

    # Download SHA-256 checksum file and compare package against it.
    wget "https://github.com/brave/brave-browser/releases/download/${2}/brave-browser_${1}_${arch}.deb.sha256"

    local chksum
    chksum=$(sha256sum -c "brave-browser_${1}_${arch}.deb.sha256" > /dev/null)
    rm -f "brave-browser_${1}_${arch}.deb.sha256"

    if (( chksum == 0)); then
        echo "SHA-256 checksum OK for downloaded Brave deb package."
    else
        echo "SHA-256 checksum failed for downloaded Brave deb package."
        echo "Aborting..."
        exit 1
    fi

    # Convert Debian package to XBPS installable package and install it.
    echo "Installing Brave for a Void system..."
    xdeb -Sedf "brave-browser_${1}_${arch}.deb"
    doas xbps-install -Syu -R ./binpkgs brave-browser
    rm -f "brave-browser_${1}_${arch}.deb"
    rm -f shlibs
    rm -rf workdir
    rm -rf datadir
    rm -rf destdir
    rm -rf binpkgs
}

# Check latest version of Brave against currently installed version.
check_for_brave_updates() {
    local vers_file
    vers_file='.brave_version'
    if ! [[ -f "${vers_file}" ]]; then
        echo "0" > "${vers_file}" # Create 0 version as placeholder.
    fi

    local releases_file
    releases_file='.brave_releases.json'
    if ! [[ -f "${releases_file}" ]]; then
        touch "${releases_file}"
    fi

    local now
    local updated
    local timediff
    now=$(date +%s)
    updated=$(stat -c %Y $releases_file)
    time_diff=$((now - updated))

    if [[ $time_diff -ge 86400 ]] || ! [[ -s "${releases_file}" ]]; then
        echo "Updating Brave releases file as >= 24 hrs since last check..."
        curl -s "https://api.github.com/repos/brave/brave-browser/releases?per_page=100&page=1" >  "${releases_file}"
        echo
    fi

    local vers
    vers=$(grep "Release" "$releases_file" | head -n 1 | awk '{ print $3 }')
    local v
    v="${vers:1}"

    echo "Latest Brave version is ${v}."

    if [[ -s "${vers_file}" ]]; then
        local installed
        read -r installed < "${vers_file}"
        installed=$(printf "%s" "$installed")
        echo "Installed Brave version is ${installed}."
    fi

    if [[ "$installed" != "$v" ]]; then
        echo
        install_latest_brave_deb "$v" "$vers"
        echo "$v" > "${vers_file}"
    fi
    echo "Done."
    exit 0
}

check_for_brave_updates

This script makes use of curl, wget and the xdeb tool.