chore(Dockerfile): cleanup after installation a bit more than before and keep copyright / license files (#54)

Author: helgi

rootfs/Dockerfile

@@ -2,32 +2,44 @@ FROM quay.io/deis/base:v0.3.4
 
 COPY . /
 
-RUN apt-get update \
-  && apt-get install -y \
-    g++ \
-    gcc \
-    make \
-    ruby \
-    ruby-dev \
-  && export FLUENTD_VERSION=0.14.4 \
-  && gem install --no-document fluentd -v $FLUENTD_VERSION \
-  && gem install bundler \
-  && bundle install --gemfile=/opt/fluentd/deis-output/Gemfile \
-  && rake --rakefile=/opt/fluentd/deis-output/Rakefile build \
-  && fluent-gem install --no-document fluent-plugin-kubernetes_metadata_filter -v 0.25.3  \
-  && fluent-gem install --no-document fluent-plugin-elasticsearch -v 1.6.0 \
-  && fluent-gem install --no-document fluent-plugin-remote_syslog -v 0.3.2 \
-  && fluent-gem install --no-document fluent-plugin-sumologic-mattk42 -v 0.0.4 \
-  && fluent-gem install --no-document influxdb -v 0.3.2 \
-  && fluent-gem install --no-document nsq-ruby -v 1.7.0 \
-  && fluent-gem install --local /opt/fluentd/deis-output/pkg/fluent-plugin-deis_output-0.1.0.gem \
-  && apt-get remove -y --auto-remove --purge \
-    g++ \
-    gcc \
-    make \
-    ruby-dev \
-  && apt-get clean \
-  && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /usr/share/man /usr/share/doc
+RUN buildDeps='g++ gcc make ruby-dev'; \
+    apt-get update && \
+    apt-get install -y \
+        $buildDeps \
+        ruby && \
+    export FLUENTD_VERSION=0.14.4 && \
+    gem install --no-document fluentd -v $FLUENTD_VERSION && \
+    gem install bundler && \
+    bundle install --gemfile=/opt/fluentd/deis-output/Gemfile && \
+    rake --rakefile=/opt/fluentd/deis-output/Rakefile build && \
+    fluent-gem install --no-document fluent-plugin-kubernetes_metadata_filter -v 0.25.3  && \
+    fluent-gem install --no-document fluent-plugin-elasticsearch -v 1.6.0 && \
+    fluent-gem install --no-document fluent-plugin-remote_syslog -v 0.3.2 && \
+    fluent-gem install --no-document fluent-plugin-sumologic-mattk42 -v 0.0.4 && \
+    fluent-gem install --no-document influxdb -v 0.3.2 && \
+    fluent-gem install --no-document nsq-ruby -v 1.7.0 && \
+    fluent-gem install --local /opt/fluentd/deis-output/pkg/fluent-plugin-deis_output-0.1.0.gem && \
+    # cleanup
+    apt-get purge -y --auto-remove $buildDeps && \
+    apt-get autoremove -y && \
+    apt-get clean -y && \
+    # package up license files if any by appending to existing tar
+    COPYRIGHT_TAR='/usr/share/copyrights.tar'; \
+    gunzip $COPYRIGHT_TAR.gz; tar -rf $COPYRIGHT_TAR /usr/share/doc/*/copyright; gzip $COPYRIGHT_TAR && \
+    rm -rf \
+        /usr/share/doc \
+        /usr/share/man \
+        /usr/share/info \
+        /usr/share/locale \
+        /var/lib/apt/lists/* \
+        /var/log/* \
+        /var/cache/debconf/* \
+        /etc/systemd \
+        /lib/lsb \
+        /lib/udev \
+        /usr/lib/x86_64-linux-gnu/gconv/IBM* \
+        /usr/lib/x86_64-linux-gnu/gconv/EBC* && \
+    bash -c "mkdir -p /usr/share/man/man{1..8}"
 
 COPY /var /var