From 954ff4696af2cab4c81108363915d1123c60b34c Mon Sep 17 00:00:00 2001
From: Martin Matuska <martin@matuska.org>
Date: Sat, 30 Mar 2019 01:26:26 +0100
Subject: [PATCH] Cirrus CI - support existing homebrew packages

---
 build/ci/cirrus_ci.sh | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/build/ci/cirrus_ci.sh b/build/ci/cirrus_ci.sh
index 9db762f97..4def08374 100755
--- a/build/ci/cirrus_ci.sh
+++ b/build/ci/cirrus_ci.sh
@@ -17,8 +17,11 @@ then
 	elif [ "${UNAME}" = "Darwin" ]
 	then
 		set -x -e
-		brew update
-		brew install autoconf automake libtool pkg-config cmake xz lz4 zstd
+		brew update > /dev/null
+		for pkg in autoconf automake libtool pkg-config cmake xz lz4 zstd
+		do
+			brew list $pkg > /dev/null && brew upgrade $pkg || brew install $pkg
+		done
 	elif [ "${UNAME}" = "Linux" ]
 	then
 		if [ -f "/etc/debian_version" ]
-- 
2.47.2