Display error if pyenv activate was invoked as a command

bin/pyenv-deactivate

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+#
+# Summary: Deactivate virtual environment
+#
+# Usage: pyenv deactivate
+#
+# Deactivate a Python virtual environment.
+
+set -e
+[ -n "$PYENV_DEBUG" ] && set -x
+
+{ printf "\x1B[31;1m"
+  echo
+  echo "Failed to deactivate virtualenv."
+  echo
+  echo "Perhaps pyenv-virtualenv has not been loaded into your shell properly."
+  echo "Please restart current shell and try again."
+  echo
+  printf "\x1B[0m"
+} 1>&2
+exit 1