trying to fix conda for travis

.travis.yml

@@ -4,6 +4,8 @@ python:
   - "3.5"
 
 install:
+  - sudo apt-get update
+
   - pip install --upgrade pip
   - pip install pep257
 
@@ -13,10 +15,22 @@ install:
   - pip install requests
   - pip install pycosat
 
-  # TODO: apparently it's not safe to use pip to install conda
+  # apparently it's not safe to use pip to install conda
   # https://github.com/conda/conda/issues/2420
   # http://conda.pydata.org/docs/travis.html
-  - pip install conda
+  - if [[ "$TRAVIS_PYTHON_VERSION" == "2.7" ]]; then
+      wget https://repo.continuum.io/miniconda/Miniconda2-latest-Linux-x86_64.sh -O miniconda.sh;
+    else
+      wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh;
+    fi
+  - 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 update -q conda
+  # Useful for debugging any issues with conda
+  - conda info -a
+
   - conda create -y -n newenv numba futures
   - source activate newenv