From ba76e4508eecf08797c2c5b7b9ca196fabbeab0f Mon Sep 17 00:00:00 2001
From: Lu Fang <30275821+houseroad@users.noreply.github.com>
Date: Wed, 9 Jan 2019 21:51:00 -0800
Subject: [PATCH] print some information (#1724)

---
 .travis/before_install.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.travis/before_install.sh b/.travis/before_install.sh
index 359a95bdd75..9559807c563 100755
--- a/.travis/before_install.sh
+++ b/.travis/before_install.sh
@@ -2,6 +2,8 @@
 
 # Don't source setup.sh here, because the virtualenv might not be set up yet
 
+set -o xtrace
+
 export NUMCORES=`grep -c ^processor /proc/cpuinfo`
 if [ ! -n "$NUMCORES" ]; then
   export NUMCORES=`sysctl -n hw.ncpu`
@@ -27,6 +29,7 @@ if [ "$TRAVIS_OS_NAME" == "linux" ]; then
   install_protobuf
 
 elif [ "$TRAVIS_OS_NAME" == "osx" ]; then
+  brew update
   brew install ccache protobuf
   if [ "${PYTHON_VERSION}" == "python3" ]; then
     brew upgrade python