Introduce separate Docker image for Ruby 2.3.6 runtime

ruby.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+SOURCE_DIR=$(realpath $(dirname "${0}"))/ruby
+
+# Build Docker container
+docker build -t ruby ${SOURCE_DIR}

ruby/Dockerfile

@@ -0,0 +1,33 @@
+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