From 02a0089fc1c627e9f98776ab64c2aaac5209a56e Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Wed, 22 Apr 2020 22:35:56 -0500
Subject: [PATCH] [ci] added echoing of R CMD check logs to CI (#3009)

---
 .ci/test_r_package.sh | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/.ci/test_r_package.sh b/.ci/test_r_package.sh
index 4dddd36225f4..10891383411b 100755
--- a/.ci/test_r_package.sh
+++ b/.ci/test_r_package.sh
@@ -86,9 +86,17 @@ export _R_CHECK_FORCE_SUGGESTS_=0
 
 # fails tests if either ERRORs or WARNINGs are thrown by
 # R CMD CHECK
+check_succeeded="yes"
 R CMD check ${PKG_TARBALL} \
     --as-cran \
-|| exit -1
+|| check_succeeded="no"
+
+echo "R CMD check build logs:"
+cat ${BUILD_DIRECTORY}/lightgbm.Rcheck/00install.out
+
+if [[ $check_succeeded == "no" ]]; then
+    exit -1
+fi
 
 if grep -q -R "WARNING" "$LOG_FILE_NAME"; then
     echo "WARNINGS have been found by R CMD check!"