From 5b703c0db04c2eda8793da26d2d709ba38619adc Mon Sep 17 00:00:00 2001
From: romkatv <roman.perepelitsa@gmail.com>
Date: Wed, 22 May 2019 13:58:45 +0200
Subject: [PATCH] speed up swift_version prompt

---
 powerlevel9k.zsh-theme | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/powerlevel9k.zsh-theme b/powerlevel9k.zsh-theme
index fec9e05e..9ec8ad65 100755
--- a/powerlevel9k.zsh-theme
+++ b/powerlevel9k.zsh-theme
@@ -2039,11 +2039,10 @@ prompt_openfoam() {
 ################################################################
 # Segment to display Swift version
 prompt_swift_version() {
-  # Get the first number as this is probably the "main" version number..
-  local swift_version=$(swift --version 2>/dev/null | grep -o -E "[0-9.]+" | head -n 1)
-  [[ -z "${swift_version}" ]] && return
-
-  "$1_prompt_segment" "$0" "$2" "magenta" "white" 'SWIFT_ICON' 0 '' "${swift_version//\%/%%}"
+  _p9k_cached_cmd_stdout swift --version || return
+  emulate -L zsh && setopt extendedglob
+  [[ $_P9K_RETVAL == (#b)[^[:digit:]]#([[:digit:].]##)* ]] || return
+  "$1_prompt_segment" "$0" "$2" "magenta" "white" 'SWIFT_ICON' 0 '' "${match[1]//\%/%%}"
 }
 
 ################################################################