[RocksJava] MVN Build reads version from version.h

java/rocksjni.pom

@@ -8,7 +8,8 @@
     <url>http://rocksdb.org/</url>
     <groupId>org.rocksdb</groupId>
     <artifactId>rocksdbjni</artifactId>
-    <version>3.8.0</version>
+    <!-- Version will be automatically replaced -->
+    <version>-</version>
     <description>RocksDB fat jar that contains .so files for linux32 and linux64, and jnilib files
         for Mac OSX.
     </description>
@@ -139,6 +140,38 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.codehaus.gmaven</groupId>
+                <artifactId>groovy-maven-plugin</artifactId>
+                <version>2.0</version>
+                <executions>
+                    <execution>
+                        <phase>process-classes</phase>
+                        <goals>
+                            <goal>execute</goal>
+                        </goals>
+                        <configuration>
+                            <defaults>
+                                <name>Xenu</name>
+                            </defaults>
+                            <source>
+                                String fileContents = new File("${project.basedir}/../include/rocksdb/version.h").getText('UTF-8')
+                                matcher = (fileContents =~ /(?s).*ROCKSDB_MAJOR ([0-9]+).*?/)
+                                String major_version = matcher.getAt(0).getAt(1)
+                                matcher = (fileContents =~ /(?s).*ROCKSDB_MINOR ([0-9]+).*?/)
+                                String minor_version = matcher.getAt(0).getAt(1)
+                                matcher = (fileContents =~ /(?s).*ROCKSDB_PATCH ([0-9]+).*?/)
+                                String patch_version = matcher.getAt(0).getAt(1)
+                                String version = String.format('%s.%s.%s', major_version, minor_version, patch_version)
+                                // Set version to be used in pom.properties
+                                project.version = version
+                                // Set version to be set as jar name
+                                project.build.finalName = project.artifactId + "-" + version
+                            </source>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>