feat: show Python virtualenv if one is activated

files/etc/bash.promptrc

@@ -67,8 +67,15 @@ function __prompt_command() {
 		PS1="[${RC_GREEN}${CURR_EXIT}${DEFAULT_FOREGROUND}]"	# displays green exit status if everything went well
 	fi
 
+	# find out if we're inside of a virtualenv
+	local VENV_STRING=""
+	if [[ -n ${VIRTUAL_ENV} ]]; then
+		VENV_STRING="[$( basename ${VIRTUAL_ENV} )]"
+	fi
+
 	# final Bash prompt assembly
 	PS1="${PS1}${BACKGROUND}${USERAT}${PATH_GREEN}[\w]\[$(tput sgr0)\]"
+	PS1="${PS1}${VENV_STRING}"
 	PS1="${PS1}${USERHASH} "
 	# add Git branch to PS1 if CWD is a Git Repo
 	#source /usr/lib/git-core/git-sh-prompt