This is just an initial concept to break apart our Docker files.

Dockerfile

@@ -1,24 +1,15 @@
 # Read the Docs - Environment base
-FROM ubuntu:16.04
+FROM readthedocs/build:base
 MAINTAINER Read the Docs <[email protected]>
 LABEL version="latest"
 
-ENV DEBIAN_FRONTEND noninteractive
-ENV APPDIR /app
-ENV LANG C.UTF-8
-
-# System dependencies
-RUN apt-get -y update
-RUN apt-get -y install vim software-properties-common
-
 # Install requirements
-RUN apt-get -y install \
-    bzr subversion git-core mercurial libpq-dev libxml2-dev libxslt-dev \
+RUN apt-get -y install libpq-dev libxml2-dev libxslt-dev \
     libxslt1-dev build-essential postgresql-client libmysqlclient-dev curl \
-    doxygen g++ graphviz-dev libfreetype6 libbz2-dev libcairo2-dev \
+    g++ libfreetype6 libbz2-dev libcairo2-dev \
     libenchant1c2a libevent-dev libffi-dev libfreetype6-dev \
     libgraphviz-dev libjpeg-dev libjpeg8-dev liblcms2-dev libreadline-dev \
-    libsqlite3-dev libtiff5-dev libwebp-dev pandoc pkg-config zlib1g-dev
+    libsqlite3-dev libtiff5-dev libwebp-dev pkg-config zlib1g-dev
 
 # LaTeX -- split to reduce image layer size
 RUN apt-get -y install texlive-fonts-extra
@@ -33,62 +24,4 @@ RUN apt-get -y install \
 # Install plantuml
 RUN apt-get -y install plantuml
 
-# Install Python tools/libs
-RUN apt-get -y install python-pip && pip install -U virtualenv auxlib
-
-# UID and GID from readthedocs/user
-RUN groupadd --gid 205 docs
-RUN useradd -m --uid 1005 --gid 205 docs
-
-USER docs
-WORKDIR /home/docs
-
-# Install Conda
-RUN curl -O https://repo.continuum.io/miniconda/Miniconda2-4.3.11-Linux-x86_64.sh
-RUN bash Miniconda2-4.3.11-Linux-x86_64.sh -b -p /home/docs/.conda/
-env PATH $PATH:/home/docs/.conda/bin
-
-# Install pyenv
-RUN git clone --depth 1 https://github.com/yyuu/pyenv.git ~docs/.pyenv
-ENV PYENV_ROOT /home/docs/.pyenv
-ENV PATH /home/docs/.pyenv/shims:$PATH:/home/docs/.pyenv/bin
-
-# Install supported Python versions
-RUN pyenv install 2.7.13 && \
-    pyenv install 3.6.0 && \
-    pyenv install 3.5.2 && \
-    pyenv install 3.4.5 && \
-    pyenv install 3.3.6 && \
-    pyenv global 2.7.13 3.6.0 3.5.2 3.4.5 3.3.6
-
-WORKDIR /tmp
-
-RUN pyenv local 2.7.13 && \
-    pyenv exec pip install -U pip && \
-    pyenv exec pip install --only-binary numpy,scipy numpy scipy && \
-    pyenv exec pip install pandas matplotlib virtualenv
-
-RUN pyenv local 3.6.0 && \
-    pyenv exec pip install -U pip && \
-    pyenv exec pip install --only-binary numpy,scipy numpy scipy && \
-    pyenv exec pip install pandas matplotlib virtualenv
-
-RUN pyenv local 3.5.2 && \
-    pyenv exec pip install -U pip && \
-    pyenv exec pip install --only-binary numpy,scipy numpy scipy && \
-    pyenv exec pip install pandas matplotlib virtualenv
-
-RUN pyenv local 3.4.5 && \
-    pyenv exec pip install -U pip && \
-    pyenv exec pip install --only-binary numpy,scipy numpy scipy && \
-    pyenv exec pip install pandas matplotlib virtualenv
-
-RUN pyenv local 3.3.6 && \
-    pyenv exec pip install -U pip && \
-    pyenv exec pip install --only-binary numpy,scipy numpy scipy && \
-    pyenv exec pip install "pandas<0.18" "matplotlib<1.5" virtualenv && \
-    pyenv local --unset
-
-WORKDIR /
-
 CMD ["/bin/bash"]

base/Dockerfile

@@ -0,0 +1,83 @@
+# Read the Docs - Sphinx Only Image
+#
+# This image only has a base sphinx and python environment.
+# It can't create PDF's and doesn't have special C libraries.
+
+FROM ubuntu:16.04
+MAINTAINER Read the Docs <[email protected]>
+LABEL version="base"
+
+ENV DEBIAN_FRONTEND noninteractive
+ENV APPDIR /app
+ENV LANG C.UTF-8
+
+# System dependencies
+RUN apt-get -y update
+RUN apt-get -y install vim software-properties-common
+RUN apt-get -y install python-setuptools python3-setuptools python-dev python3-dev
+
+# Version control and basic building utilies
+RUN apt-get -y install bzr subversion git-core mercurial build-essential 
+
+# from readthedocs.build
+RUN apt-get -y install graphviz graphviz-dev pandoc doxygen 
+
+# Install Python tools/libs
+RUN apt-get -y install python-pip && pip install -U virtualenv auxlib
+
+# UID and GID from readthedocs/user
+RUN groupadd --gid 205 docs
+RUN useradd -m --uid 1005 --gid 205 docs
+
+USER docs
+WORKDIR /home/docs
+
+# Install Conda
+RUN curl -O https://repo.continuum.io/miniconda/Miniconda2-4.3.11-Linux-x86_64.sh
+RUN bash Miniconda2-4.3.11-Linux-x86_64.sh -b -p /home/docs/.conda/
+env PATH $PATH:/home/docs/.conda/bin
+
+# Install pyenv
+RUN git clone --depth 1 https://github.com/yyuu/pyenv.git ~docs/.pyenv
+ENV PYENV_ROOT /home/docs/.pyenv
+ENV PATH /home/docs/.pyenv/shims:$PATH:/home/docs/.pyenv/bin
+
+# Install supported Python versions
+RUN pyenv install 2.7.13 && \
+    pyenv install 3.6.0 && \
+    pyenv install 3.5.2 && \
+    pyenv install 3.4.5 && \
+    pyenv install 3.3.6 && \
+    pyenv global 2.7.13 3.6.0 3.5.2 3.4.5 3.3.6
+
+WORKDIR /tmp
+
+RUN pyenv local 2.7.13 && \
+    pyenv exec pip install -U pip && \
+    pyenv exec pip install --only-binary numpy,scipy numpy scipy && \
+    pyenv exec pip install pandas matplotlib virtualenv
+
+RUN pyenv local 3.6.0 && \
+    pyenv exec pip install -U pip && \
+    pyenv exec pip install --only-binary numpy,scipy numpy scipy && \
+    pyenv exec pip install pandas matplotlib virtualenv
+
+RUN pyenv local 3.5.2 && \
+    pyenv exec pip install -U pip && \
+    pyenv exec pip install --only-binary numpy,scipy numpy scipy && \
+    pyenv exec pip install pandas matplotlib virtualenv
+
+RUN pyenv local 3.4.5 && \
+    pyenv exec pip install -U pip && \
+    pyenv exec pip install --only-binary numpy,scipy numpy scipy && \
+    pyenv exec pip install pandas matplotlib virtualenv
+
+RUN pyenv local 3.3.6 && \
+    pyenv exec pip install -U pip && \
+    pyenv exec pip install --only-binary numpy,scipy numpy scipy && \
+    pyenv exec pip install "pandas<0.18" "matplotlib<1.5" virtualenv && \
+    pyenv local --unset
+
+WORKDIR /
+
+CMD ["/bin/bash"]