From 7664e97a640640bdae1744bc330d6dc3dcf620b0 Mon Sep 17 00:00:00 2001
From: Eliza Weisman <eliza@buoyant.io>
Date: Mon, 20 Dec 2021 09:21:11 -0800
Subject: [PATCH] Use `grep` rather than `expr match`

Co-authored-by: Taiki Endo <te316e89@gmail.com>
---
 main.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/main.sh b/main.sh
index dda59eb..1e8ee5d 100755
--- a/main.sh
+++ b/main.sh
@@ -41,7 +41,7 @@ fi
 version="${tag}"
 # extract the portion of the tag matching the prefix pattern
 if [[ ! "${prefix}" = "" ]]; then
-    prefix=$(expr match "${tag}" "\(${prefix}\)")
+    prefix=$(grep <<<"${tag}" -Eo "^${prefix}")
     version="${tag#${prefix}}"
     version="${version#-}"
 fi