separated before_install and install sh files

before_install_nix_win_cache.sh

@@ -0,0 +1,29 @@
+  # Set conda path info
+if [[ "$TRAVIS_OS_NAME" != "windows" ]]; then
+    export MINICONDA_PATH=$HOME/miniconda;
+    export MINICONDA_SUB_PATH=$MINICONDA_PATH/bin;
+elif [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
+    export MINICONDA_PATH=/c/tools/miniconda3;
+    export MINICONDA_PATH_WIN=`cygpath --windows $MINICONDA_PATH`;
+    export MINICONDA_SUB_PATH=$MINICONDA_PATH/Scripts;
+fi;
+export MINICONDA_LIB_BIN_PATH=$MINICONDA_PATH/Library/bin;
+  # Obtain miniconda installer
+if [[ "$TRAVIS_OS_NAME" != "windows" ]]; then
+    if [[ -f $HOME/download/miniconda.sh ]]; then
+    echo "miniconda.sh for posix already available";
+    else
+    mkdir -p $HOME/download;
+    if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
+        echo "downloading miniconda.sh for linux";
+        wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O $HOME/download/miniconda.sh;
+    elif  [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
+        echo "downloading miniconda.sh for osx";
+        wget https://repo.continuum.io/miniconda/Miniconda3-latest-MacOSX-x86_64.sh -O $HOME/download/miniconda.sh;
+    fi;
+    fi;
+fi;
+  # Install openssl for Windows
+if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
+    choco install openssl.light;
+fi;

install_nix_win_cache.sh

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+  # Install miniconda
+if [[ "$TRAVIS_OS_NAME" != "windows" ]]; then
+    if [[ -d $MINICONDA_SUB_PATH ]]; then
+        echo "miniconda for posix already available";
+    else
+        echo "installing miniconda for posix";
+        bash $HOME/download/miniconda.sh -b -u -p $MINICONDA_PATH;
+    fi;
+elif  [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
+    if [[ -d $MINICONDA_SUB_PATH ]]; then
+        echo "miniconda for Windows already installed";
+    else
+        echo "installing miniconda for windows";
+        choco install miniconda3 --params="'/JustMe /AddToPath:1 /D:$MINICONDA_PATH_WIN'";
+    fi;
+fi;
+export PATH="$MINICONDA_PATH:$MINICONDA_SUB_PATH:$MINICONDA_LIB_BIN_PATH:$PATH";
+source $MINICONDA_PATH/etc/profile.d/conda.sh;
+hash -r;
+echo $TRAVIS_OS_NAME
+python --version
+conda config --set always_yes yes --set changeps1 no;
+conda update -q conda;
+# Useful for debugging any issues with conda
+conda info -a
+# See if test-environment already available
+# As necessary, apply python module recipies
+if [[ ! -d $MINICONDA_PATH/envs/test-environment ]]; then
+    echo "create test-environment";
+    conda env create -n test-environment python=$CONDA_PYTHON -f ./tests/environment.${CONDA_PYTHON}.yml;
+else
+    echo "update test-environment";
+    conda env update -n test-environment python=$CONDA_PYTHON -f ./tests/environment.${CONDA_PYTHON}.yml;
+fi;
+conda activate test-environment
+conda list