[SPARK-14279][BUILD] Pick the spark version from pom

## What changes were proposed in this pull request?
Change the way spark picks up version information. Also embed the build information to better identify the spark version running.

More context can be found here : https://github.com/apache/spark/pull/12152

## How was this patch tested?
Ran the mvn and sbt builds to verify the version information was being displayed correctly on executing <code>spark-submit --version </code>

![image](https://cloud.githubusercontent.com/assets/7732317/15197251/f7c673a2-1795-11e6-8b2f-88f2a70cf1c1.png)

Author: Dhruve Ashar <dhruveashar@gmail.com>

Closes #13061 from dhruve/impr/SPARK-14279.

1 files changed, 38 insertions, 0 deletions

diff --git a/build/spark-build-info b/build/spark-build-info
new file mode 100755
index 0000000000..ad0ec67f45
--- /dev/null
+++ b/build/spark-build-info
@@ -0,0 +1,38 @@
+#!/usr/bin/env 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 script generates the build info for spark and places it into the spark-version-info.properties file.
+# Arguments:
+#   build_tgt_directory - The target directory where properties file would be created. [./core/target/extra-resources]
+#   spark_version - The current version of spark
+
+RESOURCE_DIR="$1"
+mkdir -p "$RESOURCE_DIR"
+SPARK_BUILD_INFO="${RESOURCE_DIR}"/spark-version-info.properties
+
+echo_build_properties() {
+  echo version=$1
+  echo user=$USER
+  echo revision=$(git rev-parse HEAD)
+  echo branch=$(git rev-parse --abbrev-ref HEAD)
+  echo date=$(date -u +%Y-%m-%dT%H:%M:%SZ)
+  echo url=$(git config --get remote.origin.url)
+}
+
+echo_build_properties $2 > "$SPARK_BUILD_INFO"