Adding ubuntu based build and test docker image (#624)

Adding ubuntu based build and test image. There was no gitlab based CI for python 3.7

Author: Keith-Wyss

.gitlab-ci.yml

@@ -40,6 +40,12 @@ build_wheel_linux_py36:
   variables:
     PYTHON: /usr/local/bin/python3
 
+build_wheel_linux_py37:
+  <<: *build_linux
+  image: registry.gitlab.com/coremltools/coremltools/build-image-ubuntu:1.0.0
+  variables:
+    PYTHON: /usr/local/bin/python3.7
+
 .test_linux: &test_linux
   tags:
     - dockerized
@@ -74,6 +80,16 @@ test_wheel_linux_py36:
     WHEEL_PATH: build/dist/coremltools*cp36-none-manylinux1_x86_64.whl
     PYTHON: /usr/local/bin/python3
 
+test_wheel_linux_py37:
+  <<: *test_linux
+  image: registry.gitlab.com/coremltools/coremltools/build-image-ubuntu:1.0.0
+  dependencies:
+    - build_wheel_linux_py37
+  variables:
+    WHEEL_PATH: build/dist/coremltools*cp37-none-manylinux1_x86_64.whl
+    PYTHON: /usr/local/bin/python3.7
+
+
 #########################################################################
 ##
 ##                         macOS - Build & Test

docker/Dockerfile-python3.7-build

@@ -0,0 +1,32 @@
+# An Ubuntu based image that is used for gitlab based ci infrastructure
+FROM ubuntu:16.04
+# Install dependencies, particularly libraries that python or CMake need
+RUN  apt-get -y update \                                                                                                                            
+     && apt-get -y install gcc-5 g++-5 libstdc++6 \
+        python-setuptools curl git libssl-dev \
+        make vim-common zlib1g-dev libffi-dev \
+        libbz2-dev libopenblas-dev liblapack-dev \
+     && ln -s /usr/bin/g++-5 /usr/bin/g++
+WORKDIR /                                                                                                                            
+RUN  mkdir src                                                                                                                                   
+ENV PATH=/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin                                                
+ENV LD_LIBRARY_PATH=/usr/local/lib:/usr/local/lib64:                                                                                
+WORKDIR /src                                                                                                                         
+RUN  curl -O https://www.python.org/ftp/python/3.7.6/Python-3.7.6.tgz \
+     && tar xvf Python-3.7.6.tgz
+WORKDIR /src/Python-3.7.6
+RUN  ./configure --prefix=/usr/local --enable-unicode=ucs4 --enable-shared --enable-loadable-sqlite-extensions \
+     && make -j16 && make install
+WORKDIR /opt
+RUN  curl -L https://github.com/Kitware/CMake/releases/download/v3.13.4/cmake-3.13.4-Linux-x86_64.tar.gz -o cmake-3.13.4-Linux-x86_64.tar.gz \
+     && tar xf cmake-3.13.4-Linux-x86_64.tar.gz 
+ENV PATH=/opt/cmake-3.13.4-Linux-x86_64/bin:/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+WORKDIR /src
+RUN curl -O https://bootstrap.pypa.io/get-pip.py
+RUN python3 get-pip.py
+RUN pip3 install virtualenv
+WORKDIR /root
+# Give Cmake hints about compilers to use.
+ENV CC="/usr/bin/gcc"
+ENV CXX="/usr/bin/g++"
+CMD ["/bin/bash"]