.gitpod.Dockerfile

FROM buildpack-deps:focal

### base ###
RUN yes | unminimize \
    && apt-get install -yq \
        zip \
        unzip \
        bash-completion \
        build-essential \
        htop \
        jq \
        less \
        locales \
        man-db \
        nano \
        software-properties-common \
        sudo \
        time \
        vim \
        multitail \
        lsof \
    && locale-gen en_US.UTF-8 \
    && mkdir /var/lib/apt/dazzle-marks \
    && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/*

ENV LANG=en_US.UTF-8

### Git ###
RUN add-apt-repository -y ppa:git-core/ppa \
    && apt-get install -yq git \
    && rm -rf /var/lib/apt/lists/*

### Gitpod user ###
# '-l': see https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#user
RUN useradd -l -u 33333 -G sudo -md /home/gitpod -s /bin/bash -p gitpod gitpod \
    # passwordless sudo for users in the 'sudo' group
    && sed -i.bkp -e 's/%sudo\s\+ALL=(ALL\(:ALL\)\?)\s\+ALL/%sudo ALL=NOPASSWD:ALL/g' /etc/sudoers
ENV HOME=/home/gitpod
WORKDIR $HOME
# custom Bash prompt
RUN { echo && echo "PS1='\[\e]0;\u \w\a\]\[\033[01;32m\]\u\[\033[00m\] \[\033[01;34m\]\w\[\033[00m\] \\\$ '" ; } >> .bashrc

### Gitpod user (2) ###
USER gitpod
# use sudo so that user does not get sudo usage info on (the first) login
RUN sudo echo "Running 'sudo' for Gitpod: success" && \
    # create .bashrc.d folder and source it in the bashrc
    mkdir /home/gitpod/.bashrc.d && \
    (echo; echo "for i in \$(ls \$HOME/.bashrc.d/*); do source \$i; done"; echo) >> /home/gitpod/.bashrc

### Java ###
## Place '.gradle' and 'm2-repository' in /workspace because (1) that's a fast volume, (2) it survives workspace-restarts and (3) it can be warmed-up by pre-builds.
USER gitpod
RUN curl -fsSL "https://get.sdkman.io" | bash \
 && bash -c ". /home/gitpod/.sdkman/bin/sdkman-init.sh \
             && sdk install java 11.0.10-zulu \
             && sdk install maven \
             && sdk flush archives \
             && sdk flush temp \
             && mkdir /home/gitpod/.m2 \
             && printf '<settings>\n  <localRepository>/workspace/m2-repository/</localRepository>\n</settings>\n' > /home/gitpod/.m2/settings.xml \
             && echo 'export SDKMAN_DIR=\"/home/gitpod/.sdkman\"' >> /home/gitpod/.bashrc.d/99-java \
             && echo '[[ -s \"/home/gitpod/.sdkman/bin/sdkman-init.sh\" ]] && source \"/home/gitpod/.sdkman/bin/sdkman-init.sh\"' >> /home/gitpod/.bashrc.d/99-java"