Update the plugins managment. Add the function 'omz-plugin' (inspired from bash-it)

plugins/available/autoenv/autoenv.plugin.zsh

@@ -0,0 +1,43 @@
+# Activates autoenv or reports its failure
+() {
+if ! type autoenv_init >/dev/null; then
+  for d (~/.autoenv ~/.local/bin /usr/local/opt/autoenv /usr/local/bin); do
+    if [[ -e $d/activate.sh ]]; then
+      autoenv_dir=$d
+      break
+    fi
+  done
+  if [[ -z $autoenv_dir ]]; then 
+    cat <<END >&2
+-------- AUTOENV ---------
+Could not locate autoenv installation.
+Please check if autoenv is correctly installed.
+In the meantime the autoenv plugin is DISABLED.
+--------------------------
+END
+    return 1
+  fi
+  source $autoenv_dir/activate.sh
+fi
+}
+[[ $? != 0 ]] && return $?
+
+# The use_env call below is a reusable command to activate/create a new Python
+# virtualenv, requiring only a single declarative line of code in your .env files.
+# It only performs an action if the requested virtualenv is not the current one.
+
+use_env() {
+    typeset venv
+    venv="$1"
+    if [[ "${VIRTUAL_ENV:t}" != "$venv" ]]; then
+        if workon | grep -q "$venv"; then
+            workon "$venv"
+        else
+            echo -n "Create virtualenv $venv now? (Yn) "
+            read answer
+            if [[ "$answer" == "Y" ]]; then
+                mkvirtualenv "$venv"
+            fi
+        fi
+    fi
+}