From 7b39d5e5c5fa4940b68a28bab69d9445ee71503b Mon Sep 17 00:00:00 2001
From: He Yin Ling <heyinling@espressif.com>
Date: Mon, 26 Aug 2019 11:00:46 +0800
Subject: [PATCH] Apply suggestion to tools/ci/build_examples_cmake.sh

---
 tools/ci/build_examples_cmake.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/ci/build_examples_cmake.sh b/tools/ci/build_examples_cmake.sh
index 390e7db0c0..eabc9c76c1 100755
--- a/tools/ci/build_examples_cmake.sh
+++ b/tools/ci/build_examples_cmake.sh
@@ -68,7 +68,7 @@ SDKCONFIG_DEFAULTS_CI=sdkconfig.ci
 
 EXAMPLE_PATHS=$( find ${IDF_PATH}/examples/ -type f -name CMakeLists.txt | grep -v "/components/" | grep -v "/main/" | sort )
 
-if [ -z {CI_NODE_TOTAL} ]
+if [ -z "${CI_NODE_TOTAL:-}" ]
 then
     START_NUM=0
     END_NUM=999