Add an API for accessing Cobrix version and build info.

Author: yruslan

spark-cobol/src/main/scala/za/co/absa/cobrix/spark/cobol/utils/BuildProperties.scala

@@ -20,15 +20,26 @@ import java.util.Properties
 
 object BuildProperties {
   private val properties = new Properties()
-  private val buildVersionKey = "build.version"
-  private val buildTimestampKey = "build.timestamp"
+  val buildVersionKey = "build.version"
+  val buildTimestampKey = "build.timestamp"
 
   /** Returns the version of the build. */
   lazy val buildVersion: String = properties.getProperty(buildVersionKey)
 
   /** Returns the version of the build. */
   lazy val buildTimestamp: String = properties.getProperty(buildTimestampKey)
 
+  /** Returns full version to refer to in the user interface. */
+  def getFullVersion: String = {
+    val version = buildVersion
+    if (version.contains("SNAPSHOT")) {
+      val builtAt = buildTimestamp
+      s"$version built $builtAt"
+    } else {
+      version
+    }
+  }
+
   loadConfig()
 
   private def loadConfig(): Unit = {

spark-cobol/src/test/scala/za/co/absa/cobrix/spark/cobol/utils/BuildPropertiesSuite.scala

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 ABSA Group Limited
+ *
+ * Licensed 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.
+ */
+
+package za.co.absa.cobrix.spark.cobol.utils
+
+import org.scalatest.wordspec.AnyWordSpec
+
+class BuildPropertiesSuite extends AnyWordSpec {
+  "BuildProperties" should {
+    "return non-empty build version" in {
+      assert(BuildProperties.buildVersion.nonEmpty)
+    }
+
+    "return non-empty build timestamp" in {
+      assert(BuildProperties.buildTimestamp.nonEmpty)
+    }
+
+    "return full version containing build version and timestamp for SNAPSHOT versions" in {
+      val fullVersion = BuildProperties.getFullVersion
+      assert(fullVersion.contains(BuildProperties.buildVersion))
+      if (BuildProperties.buildVersion.contains("SNAPSHOT")) {
+        assert(fullVersion.contains(BuildProperties.buildTimestamp))
+      }
+    }
+  }
+}