# shellcheck shell=bash
install_bin() {
    name="$1"
    file="$2"
    source="$3"
    flag="$4"

    if file "$file" | grep -Eqv 'ELF|executable'; then
        diag "$(red "error: file from $source not an executable")"
        exit 1
    fi

    if [ "$flag" != "--no-backup" ] && [ -f "/usr/local/bin/$name" ]; then
        sudo cp "/usr/local/bin/$name" "/usr/local/bin/$name.old"
    fi
    sudo install -m 755 "$file" "/usr/local/bin/$name"
}