From 202f9683eace3028a622b1ef16c8980abf099db1 Mon Sep 17 00:00:00 2001
From: alonamid <alonamid@eecs.berkeley.edu>
Date: Tue, 10 Apr 2018 14:52:51 -0700
Subject: [PATCH] check if arrow build dir exists (#1863)

---
 thirdparty/scripts/build_arrow.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/thirdparty/scripts/build_arrow.sh b/thirdparty/scripts/build_arrow.sh
index cf5569ecb..68b7354c4 100755
--- a/thirdparty/scripts/build_arrow.sh
+++ b/thirdparty/scripts/build_arrow.sh
@@ -50,7 +50,9 @@ if [[ ! -d $TP_DIR/../python/ray/pyarrow_files/pyarrow ]]; then
     git checkout 46aa99e9843ac0148357bb36a9235cfd48903e73
 
     cd cpp
-    mkdir build
+    if [ ! -d "build" ]; then
+      mkdir build
+    fi
     cd build
 
     ARROW_HOME=$TP_DIR/pkg/arrow/cpp/build/cpp-install