[SPARK-18828][SPARKR] Refactor scripts for R

## What changes were proposed in this pull request?

Refactored script to remove duplications and clearer purpose for each script

## How was this patch tested?

manually

Author: Felix Cheung <felixcheung_m@hotmail.com>

Closes #16249 from felixcheung/rscripts.

1 files changed, 37 insertions, 0 deletions

diff --git a/R/create-rd.sh b/R/create-rd.sh
new file mode 100755
index 0000000000..d17e161739
--- /dev/null
+++ b/R/create-rd.sh
@@ -0,0 +1,37 @@
+#!/bin/bash
+
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# This scripts packages the SparkR source files (R and C files) and
+# creates a package that can be loaded in R. The package is by default installed to
+# $FWDIR/lib and the package can be loaded by using the following command in R:
+#
+#   library(SparkR, lib.loc="$FWDIR/lib")
+#
+# NOTE(shivaram): Right now we use $SPARK_HOME/R/lib to be the installation directory
+# to load the SparkR package on the worker nodes.
+
+set -o pipefail
+set -e
+
+FWDIR="$(cd `dirname "${BASH_SOURCE[0]}"`; pwd)"
+pushd $FWDIR > /dev/null
+. $FWDIR/find-r.sh
+
+# Generate Rd files if devtools is installed
+"$R_SCRIPT_PATH/"Rscript -e ' if("devtools" %in% rownames(installed.packages())) { library(devtools); devtools::document(pkg="./pkg", roclets=c("rd")) }'