Force GNU sed on macOS

Author: rschu1ze

generate-results.sh

@@ -5,8 +5,11 @@
 
 # This is needed on Mac OS. Do `brew install coreutils`.
 [ -n "$HOMEBREW_PREFIX" ] && PATH="${HOMEBREW_PREFIX}/opt/coreutils/libexec/gnubin:${PATH}"
-if command -v gsed >/dev/null 2>&1
+if ! command -v gsed >/dev/null 2>&1
 then
+    echo "On macOS, please install GNU sed through homebrew."
+    exit 1
+else
     shopt -s expand_aliases
     alias sed='gsed'
 fi