From a0ecb64797a1d49c94481bf3d772e168940cde48 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ho=C3=A0ng=20=C4=90=E1=BB=A9c=20Hi=E1=BA=BFu?=
 <hdhoang@hdhoang.space>
Date: Thu, 1 Mar 2018 17:53:53 +0700
Subject: [PATCH] travis: skip docs-only commit range

Close #2.
---
 .travis.yml | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index 482e320..6efe881 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,7 +11,16 @@ matrix:
           packages:
             - binutils-arm-none-eabi
 
-before_install: set -e
+before_install:
+- |
+    set -e
+    # fail loudly when force-pushed
+    MODIFIED_FILES=$(git diff --name-only $TRAVIS_COMMIT_RANGE)
+    # waiting for native solution https://github.com/travis-ci/travis-ci/issues/6301
+    if ! echo ${MODIFIED_FILES} | grep -qvE '(\.md$)|(^docs)/'; then
+      echo "Only docs were updated, stopping build process."
+      exit
+    fi
 
 install:
   - bash ./scripts/install.sh