Dockerfile.jruby

FROM ubuntu:20.04

ENV DEBIAN_FRONTEND noninteractive
RUN apt-get -y update && \
    apt-get install -y sudo wget curl git-core build-essential xz-utils unzip dirmngr && \
    apt-get install -y openjdk-11-jdk-headless maven && \
    rm -rf /var/lib/apt/lists/*

##
##  install rbenv and ruby-build
##
RUN groupadd -r rubyuser && useradd -r -g rubyuser -G sudo -p "" --create-home rubyuser

ENV RBENV_ROOT=/usr/local/rbenv RBENV_RUBIES="jruby-9.4.0.0"

# chown after running `rbenv init` because that command creates some subdirectories
RUN git clone https://github.com/rbenv/rbenv.git      ${RBENV_ROOT} && \
    git clone https://github.com/rbenv/ruby-build.git ${RBENV_ROOT}/plugins/ruby-build && \
    \
    echo "export RBENV_ROOT=/usr/local/rbenv" >> /etc/rubybashrc && \
    echo "export PATH=$RBENV_ROOT/bin:\$PATH" >> /etc/rubybashrc && \
    $RBENV_ROOT/bin/rbenv init - --no-rehash bash >> /etc/rubybashrc && \
    echo "source /etc/rubybashrc" >> /etc/bashrc && \
    echo "source /etc/rubybashrc" >> /etc/bash.bashrc && \
    \
    chown -R rubyuser:rubyuser ${RBENV_ROOT} && \
    find ${RBENV_ROOT} -type d -print0 | sudo xargs -0 chmod g+sw
ENV BASH_ENV=/etc/rubybashrc


##
##  set up rake-compiler and install bootstrap rubies
##
USER rubyuser

# Install the bootstrap rubies
RUN bash -c " \
      echo 'gem: --no-ri --no-rdoc --no-document' >> ~/.gemrc && \
      export CFLAGS='-s -O3 -fno-fast-math -fPIC' && \
      for v in ${RBENV_RUBIES} ; do \
        rbenv install \$v -- --disable-install-doc ; \
      done && \
      find ${RBENV_ROOT} -type d -print0 | sudo xargs -0 chmod g+w \
    "

# Install rake-compiler and patch it to build and install static libraries for Linux rubies
COPY build/patches /home/rubyuser/patches
RUN bash -c " \
      for v in ${RBENV_RUBIES} ; do \
        rbenv shell \$v && \
        gem install rake-compiler -v1.2.9 && \
        cd ${RBENV_ROOT}/versions/\$v/lib/ruby/gems/*/gems/rake-compiler-1.2.9 && \
        for patch in /home/rubyuser/patches/rake-compiler-1.2.9/*.patch ; do \
          patch -p1 < \$patch ; \
        done \
      done \
    "

# Install rake-compiler's cross rubies in global dir instead of /root
RUN sudo mkdir -p /usr/local/rake-compiler && \
    sudo chown rubyuser.rubyuser /usr/local/rake-compiler && \
    ln -s /usr/local/rake-compiler ~/.rake-compiler


USER root

# Install SIGINT forwarder
COPY build/sigfw.c /root/
RUN gcc $HOME/sigfw.c -o /usr/local/bin/sigfw

# Install user mapper
COPY build/runas /usr/local/bin/

# Install sudoers configuration
COPY build/sudoers /etc/sudoers.d/rake-compiler-dock

RUN bash -c "rbenv global jruby-9.4.0.0"

CMD bash