FROM ubuntu:20.04

ENV TZ=Asia/Shanghai

USER root

ARG USER=user

RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone && \
    apt-get update -qq && \
    apt-get install -qqy gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf build-essential asciidoc binutils bzip2 gawk gettext git libncurses5-dev libz-dev patch python3 python2.7 unzip zlib1g-dev subversion flex uglifyjs git-core p7zip p7zip-full msmtp libssl-dev texinfo libglib2.0-dev xmlto qemu-utils upx libelf-dev autoconf automake libtool autopoint device-tree-compiler antlr3 gperf wget curl swig rsync sudo golang-go&& \
    apt-get autoremove --purge && \
    apt-get clean && \
    useradd -m -s $(which bash) $USER && \
    echo "$USER:$USER" | chpasswd && \
    echo "$USER ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers.d/$USER && \
    chmod 440 /etc/sudoers.d/$USER && \
    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

USER user
WORKDIR /home/user