Spotter-VM/ruby/Dockerfile

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FROM alpine:3.7
MAINTAINER Disassembler <disassembler@dasm.cz>
RUN \
# Install Ruby runtime dependencies
apk --no-cache add gdbm libressl readline zlib
RUN \
# Install Ruby build dependencies
apk --no-cache add --virtual .deps build-base autoconf gdbm-dev libressl-dev linux-headers readline-dev zlib-dev \
# Download and unpack Ruby
&& wget http://cache.ruby-lang.org/pub/ruby/2.3/ruby-2.3.6.tar.xz -O ruby.tar.xz \
&& mkdir -p /usr/src/ruby \
&& tar -xJf ruby.tar.xz -C /usr/src/ruby --strip-components=1 \
&& rm ruby.tar.xz \
&& cd /usr/src/ruby \
# Hackfix to suppress "Insecure world writable dir" warning
&& sed -ni 'p;13a #define ENABLE_PATH_CHECK 0' file.c \
# Configure compilation + hackfix to detect isnan/isinf macros
&& autoconf \
&& ac_cv_func_isnan=yes ac_cv_func_isinf=yes ./configure --build=x86_64-linux-musl --disable-install-doc --enable-shared \
# Compile and install Ruby
&& make -j $(nproc) \
&& make install \
# Install RubyGems and Bundler
&& mkdir -p /usr/local/etc \
&& echo -e 'install: --no-document\nupdate: --no-document' >/usr/local/etc/gemrc \
&& gem update --system \
# Cleanup
&& cd /tmp \
&& rm -r /usr/src/ruby \
&& apk --no-cache del .deps \
&& rm -rf /root/.gem