CI

.ci-maven-settings.xml

+<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
+                      http://maven.apache.org/xsd/settings-1.0.0.xsd">
+	<servers>
+		<server>
+			<id>ossrh</id>
+			<username>${env.OSSRH_USER}</username>
+			<password>${env.OSSRH_PASS}</password>
+		</server>
+	</servers>
+	<profiles>
+		<profile>
+			<id>ossrh</id>
+			<activation>
+				<activeByDefault>true</activeByDefault>
+			</activation>
+			<properties>
+				<gpg.executable>${env.GPG_EXECUTABLE}</gpg.executable>
+				<gpg.passphrase>${env.GPG_PASSPHRASE}</gpg.passphrase>
+			</properties>
+		</profile>
+	</profiles>
+</settings>

.gitlab-ci.yml

+stages:
+  - compile
+  - deploy
+
+run tests in branches:
+  stage:  compile
+  image:  maven:3-jdk-8
+  script:
+    - MAVEN_OPTS="${MAVEN_OPTS} -Dorg.slf4j.simpleLogger.defaultLogLevel=warn" mvn test -B
+  except:
+    - master
+    - tags
+
+publish artifacts:
+  stage:  deploy
+  image:  maven:3-jdk-8
+  script:
+    - echo "${GPG_KEY_SECRET}" | gpg --allow-secret-key-import --import
+    - gpg --list-keys
+    - mvn clean deploy --settings .ci-maven-settings.xml -B -U
+  only:
+    - master
+    - tags

pom.xml

@@ -34,8 +34,12 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<jdk.target>1.6</jdk.target>
-		<jdk.source>1.6</jdk.source>
+		<jdk.target>1.8</jdk.target>
+		<jdk.source>1.8</jdk.source>
+
+		<maven-gpg-plugin.version>1.5</maven-gpg-plugin.version>
+		<nexus-staging-maven-plugin.version>1.6.8</nexus-staging-maven-plugin.version>
+
 		<show.deprecations>true</show.deprecations>
 		<scribe.version>1.3.7</scribe.version>
 	</properties>
@@ -44,14 +48,16 @@
 	<build>
 		<plugins>
 			<plugin>
+				<inherited>true</inherited>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>3.1</version>
+				<version>3.6.1</version>
 				<configuration>
 					<source>${jdk.source}</source>
 					<target>${jdk.target}</target>
 					<optimize>true</optimize>
-					<!--<showDeprecation>${show.deprecations}</showDeprecation> -->
 					<showWarnings>true</showWarnings>
+					<showDeprecation>true</showDeprecation>
+					<failOnWarning>true</failOnWarning>
 				</configuration>
 			</plugin>
 			<plugin>
@@ -130,8 +136,8 @@
 			<version>4.3.6</version>
 		</dependency>
 	</dependencies>
-	
-	
+
+
 	<profiles>
 		<profile>
 			<id>release</id>
@@ -169,7 +175,7 @@
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-gpg-plugin</artifactId>
-						<version>1.5</version>
+						<version>${maven-gpg-plugin.version}</version>
 						<executions>
 							<execution>
 								<id>sign-artifacts</id>
@@ -184,15 +190,18 @@
 			</build>
 		</profile>
 	</profiles>
-	
+
 	<distributionManagement>
+		<repository>
+			<id>ossrh</id>
+			<name>Sonatype Releases</name>
+			<url>https://oss.sonatype.org/service/local/staging/deploy/maven2</url>
+		</repository>
 		<snapshotRepository>
 			<id>ossrh</id>
+			<name>Sonatype Snapshots</name>
 			<url>https://oss.sonatype.org/content/repositories/snapshots</url>
+			<uniqueVersion>true</uniqueVersion>
 		</snapshotRepository>
-		<repository>
-			<id>ossrh</id>
-			<url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
-		</repository>
 	</distributionManagement>
-</project>
\ No newline at end of file
+</project>