FROM debian:stretch

RUN apt-get update \
    && apt-get install -y \
        curl ca-certificates \
        checkinstall unzip build-essential \
        automake libtool libtool-bin pkg-config \
        bison \
        dpkg-dev \
        gcc \
        libbz2-dev \
        libgdbm-dev \
        libglib2.0-dev \
        libncurses-dev \
        libreadline-dev \
        libxml2-dev \
        libxslt-dev \
        libjemalloc-dev \
        --no-install-recommends

ENV RUBY_VERSION=2.5.5 \
    RUBY_MAJOR=2.5 \
    RUBY_DOWNLOAD_SHA256=9bf6370aaa82c284f193264cc7ca56f202171c32367deceb3599a4f354175d7d

# Ruby with jemalloc
# Taken from https://github.com/zhulux/debian-ruby-jemalloc/blob/master/Dockerfile
# --------------------------------------------------------------------------------
WORKDIR /tmp
RUN curl -sfL "https://cache.ruby-lang.org/pub/ruby/${RUBY_MAJOR%-rc}/ruby-$RUBY_VERSION.tar.xz" \
     -o ruby.tar.xz
RUN sha256sum *ruby.tar.xz \
    && echo "$RUBY_DOWNLOAD_SHA256 *ruby.tar.xz" | sha256sum -c -

RUN mkdir -p /usr/src/ruby
RUN tar -xJf ruby.tar.xz -C /usr/src/ruby --strip-components=1

WORKDIR /usr/src/ruby

# Suppress "warning: Insecure world writable dir"
RUN { \
            echo '#define ENABLE_PATH_CHECK 0'; \
            echo; \
            cat file.c; \
    } > file.c.new \
    && mv file.c.new file.c

RUN autoconf

RUN GNU_ARCH="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
    && ./configure \
            --build="$GNU_ARCH" \
            --disable-install-doc \
            --enable-shared \
            --with-jemalloc
RUN make -j "$(nproc)"

RUN checkinstall -d2 -D -y --install=no --fstrans=no  \
    --nodoc --pkgversion="$RUBY_VERSION" --pakdir=/packages make install

# Sanity check for jemalloc
RUN ruby --version \
    && ruby -r rbconfig -e "RbConfig::CONFIG['LIBS'].include?('jemalloc') \
        ? puts('Ruby is compiled with jemalloc.') \
        : raise('jemalloc is missing from Ruby!')"