Shubhanshu Mishra created SPARK-12910:
-----------------------------------------
Summary: Support for specifying version of R to use while creating
sparkR libraries
Key: SPARK-12910
URL: https://issues.apache.org/jira/browse/SPARK-12910
Project: Spark
Issue Type: Improvement
Components: SparkR
Environment: Linux
Reporter: Shubhanshu Mishra
Priority: Minor
When we use `$SPARK_HOME/R/install-dev.sh` it uses the default system R.
However, a user might have locally installed their own version of R. There
should be a way to specify which R version to use.
I have fixed this in my code using the following patch:
```
$ git diff HEAD
diff --git a/R/README.md b/R/README.md
index 005f56d..99182e5 100644
--- a/R/README.md
+++ b/R/README.md
@@ -1,6 +1,15 @@
# R on Spark
SparkR is an R package that provides a light-weight frontend to use Spark from
R.
+### Installing sparkR
+
+Libraries of sparkR need to be created in `$SPARK_HOME/R/lib`. This can be
done by running the script `$SPARK_HOME/R/install-dev.sh`.
+By default the above script uses the system wide installation of R. However,
this can be changed to any user installed location of R by giving the full path
of the `$R_HOME` as the first argument to the install-dev.sh script.
+Example:
+```
+# where /home/username/R is where R is installed and /home/username/R/bin
contains the files R and RScript
+./install-dev.sh /home/username/R
+```
### SparkR development
diff --git a/R/install-dev.sh b/R/install-dev.sh
index 4972bb9..a8efa86 100755
--- a/R/install-dev.sh
+++ b/R/install-dev.sh
@@ -35,12 +35,19 @@ LIB_DIR="$FWDIR/lib"
mkdir -p $LIB_DIR
pushd $FWDIR > /dev/null
+if [ ! -z "$1" ]
+ then
+ R_HOME="$1/bin"
+ else
+ R_HOME="$(dirname $(which R))"
+fi
+echo "USING R_HOME = $R_HOME"
# Generate Rd files if devtools is installed
-Rscript -e ' if("devtools" %in% rownames(installed.packages())) {
library(devtools); devtools::document(pkg="./pkg", roclets=c("rd")) }'
+"$R_HOME/"Rscript -e ' if("devtools" %in% rownames(installed.packages())) {
library(devtools); devtools::document(pkg="./pkg", roclets=c("rd")) }'
# Install SparkR to $LIB_DIR
-R CMD INSTALL --library=$LIB_DIR $FWDIR/pkg/
+"$R_HOME/"R CMD INSTALL --library=$LIB_DIR $FWDIR/pkg/
# Zip the SparkR package so that it can be distributed to worker nodes on YARN
cd $LIB_DIR
```
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