BLD: make 3.6 use *only* conda-forge channels

Author: jreback

.travis.yml

@@ -86,6 +86,7 @@ matrix:
         - JOB_NAME: "36"
         - TEST_ARGS="--skip-slow --skip-network"
         - PANDAS_TESTING_MODE="deprecate"
+        - CONDA_FORGE=true
       addons:
         apt:
           packages:

ci/install_travis.sh

@@ -53,14 +53,17 @@ conda config --set ssl_verify false || exit 1
 conda config --set always_yes true --set changeps1 false || exit 1
 conda update -q conda
 
+echo "[add channels]"
 # add the pandas channel to take priority
 # to add extra packages
-echo "[add channels]"
 conda config --add channels pandas || exit 1
 conda config --remove channels defaults || exit 1
 conda config --add channels defaults || exit 1
 
-conda install anaconda-client
+if [ "$CONDA_FORGE" ]; then
+    # add conda-forge channel as priority
+    conda config --add channels conda-forge || exit 1
+fi
 
 # Useful for debugging any issues with conda
 conda info -a || exit 1

ci/requirements-3.6.run

@@ -14,6 +14,7 @@ html5lib
 jinja2
 sqlalchemy
 pymysql
+feather-format
 # psycopg2 (not avail on defaults ATM)
 beautifulsoup4
 s3fs