From 4f2382ad8c6ae6ca31c62031edeada2099348f55 Mon Sep 17 00:00:00 2001
From: jgromes <jgromes@users.noreply.github.com>
Date: Wed, 31 Jul 2019 10:39:05 +0200
Subject: [PATCH] Travis add variable check

---
 .travis.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index f6683368..3e01acbc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -44,7 +44,7 @@ script:
   - |
     for example in $(find $PWD/examples -name '*.ino' | sort); do
       # check whether to skip this sketch
-      if [[ ${example} =~ $SKIP_PAT ]]; then
+      if [ ! -z "$SKIP_PAT" ] && [[ ${example} =~ $SKIP_PAT ]]; then
         # skip sketch
         echo -e "\n\033[1;33mSkipped ${example##*/} (matched with $SKIP_PAT)\033[0m";
       else