Add option for disabling NodeJS version

Author: simeg

lambda-pure.zsh

@@ -151,7 +151,10 @@ prompt_pure_preprompt_render() {
 	preprompt+="%F{cyan}${prompt_pure_cmd_exec_time}%f"
 
 	# NodeJS version
-	local rpreprompt="%F{green}⬢ ${prompt_pure_node_version}%f"
+	local rpreprompt
+	if (( ${PURE_NODE_ENABLED:-1} )); then
+	    rpreprompt+="%F{green}⬢ ${prompt_pure_node_version}%f"
+	fi
 
 	integer preprompt_left_length preprompt_right_length space_length
 	prompt_pure_string_length_to_var "${preprompt}" "preprompt_left_length"

readme.md

@@ -111,6 +111,10 @@ Defines the git up arrow symbol. The default value is `▲`.
 
 Defines the git dirty symbol. The default value is `×`.
 
+### `PURE_NODE_ENABLED`
+
+Set `PURE_NODE_ENABLED=0` to not display the NodeJS version.
+
 ## Example
 
 ```sh