Replaced ignore-installed flag by force-reinstall (#3918)

scripts/create_testenv.sh

@@ -2,52 +2,47 @@
 
 set -ex # fail on first error, print commands
 
-while test $# -gt 0
-do
-    case "$1" in
-        --global)
-            GLOBAL=1
-            ;;
-        --no-setup)
-            NO_SETUP=1
-            ;;
-    esac
-    shift
+while test $# -gt 0; do
+  case "$1" in
+  --global)
+    GLOBAL=1
+    ;;
+  --no-setup)
+    NO_SETUP=1
+    ;;
+  esac
+  shift
 done
 
 command -v conda >/dev/null 2>&1 || {
-  echo "Requires conda but it is not installed.  Run install_miniconda.sh." >&2;
-  exit 1;
+  echo "Requires conda but it is not installed.  Run install_miniconda.sh." >&2
+  exit 1
 }
 
-ENVNAME="${ENVNAME:-testenv}" # if no ENVNAME is specified, use testenv
+ENVNAME="${ENVNAME:-testenv}"         # if no ENVNAME is specified, use testenv
 PYTHON_VERSION=${PYTHON_VERSION:-3.6} # if no python specified, use 3.6
 
-if [ -z ${GLOBAL} ]
-then
-    if conda env list | grep -q ${ENVNAME}
-    then
-      echo "Environment ${ENVNAME} already exists, keeping up to date"
-    else
-      conda create -n ${ENVNAME} --yes pip python=${PYTHON_VERSION}
-    fi
-    source activate ${ENVNAME}
+if [ -z ${GLOBAL} ]; then
+  if conda env list | grep -q ${ENVNAME}; then
+    echo "Environment ${ENVNAME} already exists, keeping up to date"
+  else
+    conda create -n ${ENVNAME} --yes pip python=${PYTHON_VERSION}
+  fi
+  source activate ${ENVNAME}
 fi
 pip install --upgrade pip
 
 conda install --yes mkl-service
 conda install --yes -c conda-forge python-graphviz
 
-
-#  Install editable using the setup.py
-
 # Travis env is unable to import cached mpl sometimes https://github.com/pymc-devs/pymc3/issues/3423
-pip install --no-cache-dir --ignore-installed -e .
-pip install --no-cache-dir --ignore-installed -r requirements-dev.txt
+pip install --no-cache-dir --force-reinstall -e .
+pip install --no-cache-dir --force-reinstall -r requirements-dev.txt
 
 # Install untested, non-required code (linter fails without them)
 pip install ipython ipywidgets
 
+#  Install editable using the setup.py
 if [ -z ${NO_SETUP} ]; then
-    python setup.py build_ext --inplace
+  python setup.py build_ext --inplace
 fi