From ae853e8f3bdbd16427e6f1ffade4f63abaf74abb Mon Sep 17 00:00:00 2001
From: Shivaram Venkataraman <shivaram@cs.berkeley.edu>
Date: Thu, 15 Dec 2016 16:15:51 -0800
Subject: [PATCH] [MINOR] Only rename SparkR tar.gz if names mismatch

## What changes were proposed in this pull request?

For release builds the R_PACKAGE_VERSION and VERSION are the same (e.g., 2.1.0). Thus `cp` throws an error which causes the build to fail.

## How was this patch tested?

Manually by executing the following script
```
set -o pipefail
set -e
set -x

touch a

R_PACKAGE_VERSION=2.1.0
VERSION=2.1.0

if [ "$R_PACKAGE_VERSION" != "$VERSION" ]; then
  cp a a
fi
```

Author: Shivaram Venkataraman <shivaram@cs.berkeley.edu>

Closes #16299 from shivaram/sparkr-cp-fix.

(cherry picked from commit 9634018c4d6d5a4f2c909f7227d91e637107b7f4)
Signed-off-by: Reynold Xin <rxin@databricks.com>
---
 dev/make-distribution.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dev/make-distribution.sh b/dev/make-distribution.sh
index 4da7d57384..da44748e58 100755
--- a/dev/make-distribution.sh
+++ b/dev/make-distribution.sh
@@ -228,8 +228,8 @@ if [ "$MAKE_R" == "true" ]; then
   # Install source package to get it to generate vignettes, etc.
   # Do not source the check-cran.sh - it should be run from where it is for it to set SPARK_HOME
   NO_TESTS=1 CLEAN_INSTALL=1 "$SPARK_HOME/"R/check-cran.sh
-  # Make a copy of R source package matching the Spark release version.
-  cp $SPARK_HOME/R/SparkR_"$R_PACKAGE_VERSION".tar.gz $SPARK_HOME/R/SparkR_"$VERSION".tar.gz
+  # Move R source package to file name matching the Spark release version.
+  mv $SPARK_HOME/R/SparkR_"$R_PACKAGE_VERSION".tar.gz $SPARK_HOME/R/SparkR_"$VERSION".tar.gz
   popd > /dev/null
 else
   echo "Skipping building R source package"
-- 
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