Modified File Browser installer for USB

fb_install.sh

#!/usr/bin/env bash
#
#           File Browser Installer Script
#
#   GitHub: https://github.com/filebrowser/filebrowser
#   Issues: https://github.com/filebrowser/filebrowser/issues
#   Requires: bash, mv, rm, tr, type, grep, sed, curl/wget, tar
#

install_filemanager()
{
    trap 'echo -e "Aborted, error $? in command: $BASH_COMMAND"; trap ERR; return 1' ERR
    filemanager_os="linux"
    filemanager_arch="amd64"
    install_path="$HOME/bin"

    filemanager_bin="filebrowser"
    filemanager_dl_ext=".tar.gz"

    echo "Downloading File Browser for $filemanager_os/$filemanager_arch..."
    filemanager_file="${filemanager_os}-$filemanager_arch-filebrowser$filemanager_dl_ext"
    filemanager_tag="$(curl -s https://api.github.com/repos/filebrowser/filebrowser/releases/latest | grep -o '"tag_name": ".*"' | sed 's/"//g' | sed 's/tag_name: //g')"
    filemanager_url="https://github.com/filebrowser/filebrowser/releases/download/$filemanager_tag/$filemanager_file"
    echo "$filemanager_url"

    rm -rf "$HOME/tmp/$filemanager_file"

    if type -p curl >/dev/null 2>&1; then
        curl -fsSL "$filemanager_url" -o "$HOME/tmp/$filemanager_file"
    elif type -p wget >/dev/null 2>&1; then
        wget --quiet "$filemanager_url" -O "$HOME/tmp/$filemanager_file"
    else
        echo "Aborted, could not find curl or wget"
        return 7
    fi

    echo "Extracting..."
    case "$filemanager_file" in
        *.zip)    unzip -o "$HOME/tmp/$filemanager_file" "$filemanager_bin" -d "$HOME/tmp/" ;;
        *.tar.gz) tar -xzf "$HOME/tmp/$filemanager_file" -C "$HOME/tmp/" "$filemanager_bin" ;;
    esac
    chmod +x "$HOME/tmp/$filemanager_bin"

    echo "Putting filemanager in $install_path"
    mv "$HOME/tmp/$filemanager_bin" "$install_path/$filemanager_bin"
    rm -- "$HOME/tmp/$filemanager_file"

    if type -p $filemanager_bin >/dev/null 2>&1; then
        echo "Successfully installed"
        trap ERR
        return 0
    else
        echo "Something went wrong, File Browser is not in your path"
        trap ERR
        return 1
    fi
}

install_filemanager