From edd032093f2c6d70213c78a0fc71f744dc98e2e8 Mon Sep 17 00:00:00 2001
From: Chessmaster <ccc@timo-rath.de>
Date: Fri, 11 Dec 2020 21:58:36 +0100
Subject: [PATCH] fix grep parameter (shell not bash)

---
 build.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build.sh b/build.sh
index 293c267..56361ce 100755
--- a/build.sh
+++ b/build.sh
@@ -6,7 +6,7 @@ if [[ $# -ne 1 ]]; then
 fi
 
 revision="$1"
-version=$(echo $revision | grep -Po 'v[0-9.]*')
+version=$(echo $revision | grep -Eo 'v[0-9.]*')
 commit_date=$(git show -s --format=%ci ${revision} | cut -c1-10)
 
 asciidoctor-pdf -a revnumber=${version} -a revdate=${commit_date} -o angelguide_en.pdf guide.adoc
-- 
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