updated contrib/docker Dockerfiles to include dependencies required to build docs (#940)

contrib/docker/Dockerfile.ngraph

@@ -23,7 +23,8 @@ RUN apt-get update && apt-get install -y \
         clang-3.9 clang-format-3.9 \
         git \
         wget patch diffutils zlib1g-dev libtinfo-dev \
-        doxygen python-pip
+        doxygen graphviz \
+        python-pip
 
 RUN apt-get clean autoclean && \
     apt-get autoremove -y
@@ -37,4 +38,7 @@ RUN pip install --upgrade pip
 RUN pip install sphinx
 RUN pip install breathe
 
+# need numpy to successfully build docs for python_api
+RUN pip install numpy
+
 WORKDIR /home

contrib/docker/Dockerfile.ngraph.centos74

@@ -31,7 +31,7 @@ RUN yum -y update && \
     git \
     wget patch diffutils zlib-devel ncurses-devel libtinfo-dev \
     python python-devel python-setuptools \
-    doxygen \
+    doxygen graphviz \
     which \
     'perl(Data::Dumper)'
 
@@ -46,7 +46,6 @@ RUN easy_install pip
 RUN pip install virtualenv
 
 # Install some pip packages
-RUN pip install numpy
 
 # need to use sphinx version 1.6 to build docs
 # installing with apt-get install python-sphinx installs sphinx version 1.3.6 only
@@ -58,4 +57,7 @@ RUN pip install sphinx
 # breathe package required to build documentation
 RUN pip install breathe
 
+# need numpy to successfully build docs for python_api
+RUN pip install numpy
+
 WORKDIR /home

contrib/docker/Dockerfile.ngraph.centos74_gpu

@@ -13,7 +13,7 @@ RUN yum -y update && \
     git \
     wget patch diffutils zlib-devel ncurses-devel libtinfo-dev \
     python python-devel python-setuptools \
-    doxygen \
+    doxygen graphviz \
     which \
     'perl(Data::Dumper)'
 
@@ -29,7 +29,6 @@ RUN easy_install pip
 RUN pip install virtualenv
 
 # Install some pip packages
-RUN pip install numpy
 
 # need to use sphinx version 1.6 to build docs
 # installing with apt-get install python-sphinx installs sphinx version 1.3.6 only
@@ -41,4 +40,7 @@ RUN pip install sphinx
 # breathe package required to build documentation
 RUN pip install breathe
 
+# need numpy to successfully build docs for python_api
+RUN pip install numpy
+
 WORKDIR /home

contrib/docker/Dockerfile.ngraph.ubuntu1604

@@ -23,7 +23,8 @@ RUN apt-get update && apt-get install -y \
         clang-3.9 clang-format-3.9 \
         git \
         wget patch diffutils zlib1g-dev libtinfo-dev \
-        doxygen python-pip
+        doxygen graphviz \
+        python-pip
 
 RUN apt-get clean autoclean && \
     apt-get autoremove -y
@@ -37,4 +38,7 @@ RUN pip install --upgrade pip
 RUN pip install sphinx
 RUN pip install breathe
 
+# need numpy to successfully build docs for python_api
+RUN pip install numpy
+
 WORKDIR /home

contrib/docker/Dockerfile.ngraph.ubuntu1604_gpu

@@ -35,7 +35,7 @@ RUN apt-get update && apt-get install -y \
         clang-3.9 clang-format-3.9 \
         git \
         wget patch diffutils zlib1g-dev libtinfo-dev \
-        doxygen && \
+        doxygen graphviz && \
         apt-get clean autoclean && \
         apt-get autoremove -y
 
@@ -52,5 +52,7 @@ RUN pip install sphinx
 # breathe package required to build documentation
 RUN pip install breathe
 
-WORKDIR /home
+# need numpy to successfully build docs for python_api
+RUN pip install numpy
 
+WORKDIR /home