From 4f23a038298d1550df6281cf9bb075b12e2dc4e8 Mon Sep 17 00:00:00 2001
From: Michael Tryby <tryby.michael@epa.gov>
Date: Thu, 7 Mar 2019 12:42:29 -0500
Subject: [PATCH] Fancy grep regex

---
 tools/before-test.sh | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/before-test.sh b/tools/before-test.sh
index a7e148c..3405c86 100755
--- a/tools/before-test.sh
+++ b/tools/before-test.sh
@@ -64,8 +64,7 @@ SUT_PATH=(`find "$BUILD_HOME" -name "bin" -type d`)
 
 # hack to determine latest tag from GitHub
 LATEST_URL="https://github.com/OpenWaterAnalytics/epanet-example-networks/releases/latest"
-temp_url="$(curl -sI "${LATEST_URL}" | grep -iE "^Location:")"
-LATEST_TAG="${temp_url##*/}"
+LATEST_TAG="$(curl -sI "${LATEST_URL}" | grep -Po 'tag\/\K(v\S+)')"
 
 TEST_URL="https://codeload.github.com/OpenWaterAnalytics/epanet-example-networks/tar.gz/${LATEST_TAG}"
 BENCH_URL="https://github.com/OpenWaterAnalytics/epanet-example-networks/releases/download/${LATEST_TAG}/benchmark-${PLATFORM}-${REF_BUILD_ID}.tar.gz"