Add Alpine3.9-Ruby2.6

lxc-shared/alpine3.9-ruby2.6/lxcfile

@@ -0,0 +1,33 @@
+IMAGE alpine3.9-ruby2.6_2.6.3-190620
+
+LAYER alpine3.9_3.9.4-190620
+
+RUN EOF
+    # Install Ruby runtime dependencies
+    apk --no-cache add gdbm libressl readline zlib
+
+    # 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
+    mkdir -p /usr/src/ruby
+    wget http://cache.ruby-lang.org/pub/ruby/2.6/ruby-2.6.3.tar.xz -O - | tar xJf - -C /usr/src/ruby --strip-components=1
+
+    # Compile and install Ruby
+    cd /usr/src/ruby
+    autoconf
+    ./configure --build=x86_64-linux-musl --disable-install-doc --enable-shared
+    make -j $(getconf _NPROCESSORS_ONLN)
+    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
+    apk --no-cache del .deps
+    cd /root
+    rm -r /usr/src/ruby
+    rm -rf /root/.gem
+EOF