TST: separate conda install from nox use

Author: tswast

.travis.yml

@@ -13,37 +13,35 @@ before_install:
   - source ci/travis_process_gbq_encryption.sh
 
 install:
-  - wget http://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh;
-  - bash miniconda.sh -b -p $HOME/miniconda
-  - export PATH="$HOME/miniconda/bin:$PATH"
-  - hash -r
-  - conda config --set always_yes yes --set changeps1 no
-  - conda config --add channels pandas
-  - conda config --add channels conda-forge
-  - conda update -q conda
-  - conda info -a
-  - conda create -q -n test-environment python=$PYTHON
-  - source activate test-environment
-  - if [[ "$PANDAS" == "MASTER" ]]; then
-      conda install -q numpy pytz python-dateutil;
-    else
-      conda install -q pandas=$PANDAS;
-    fi
-  - pip install --upgrade pip setuptools
-  - pip install --upgrade nox-automation
   - REQ="ci/requirements-${PYTHON}-${PANDAS}"
-  - if [ -f "$REQ.pip" ]; then
-      pip install -r "$REQ.pip";
+    if [ -f "$REQ.pip" ]; then
+      pip install --upgrade nox-automation
     else
+      wget http://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh;
+      bash miniconda.sh -b -p $HOME/miniconda
+      export PATH="$HOME/miniconda/bin:$PATH"
+      hash -r
+      conda config --set always_yes yes --set changeps1 no
+      conda config --add channels pandas
+      conda config --add channels conda-forge
+      conda update -q conda
+      conda info -a
+      conda create -q -n test-environment python=$PYTHON
+      source activate test-environment
+      conda install -q pandas=$PANDAS;
+      pip install coverage pytest pytest-cov flake8 codecov
       conda install -q --file "$REQ.conda";
+      conda list
+      python setup.py install
     fi
-  - conda list
-  - python setup.py install
 
 script:
   - if [[ $PYTHON == '2.7' ]]; then nox -s test27 ; fi
   - if [[ $PYTHON == '3.5' ]]; then nox -s test35 ; fi
   - if [[ $PYTHON == '3.6' ]] && [[ "$PANDAS" == "MASTER" ]]; then nox -s test36master ; fi
-  - if [ -f "$REQ.conda" ]; then pip install coverage pytest pytest-cov codecov ; pytest -v --cov=pandas_gbq --cov-report xml:/tmp/pytest-cov.xml pandas_gbq ; fi
+  - if [ -f "$REQ.conda" ]; then
+      pip install coverage pytest pytest-cov codecov ;
+      pytest -v --cov=pandas_gbq --cov-report xml:/tmp/pytest-cov.xml pandas_gbq ;
+    fi
   - if [[ $COVERAGE == 'true' ]]; then nox -s coverage ; fi
   - if [[ $LINT == 'true' ]]; then nox -s lint ; fi