Maven artifact signing

pom.xml

<profiles>
	<profile>
		<id>release-sign-artifacts</id>
		<activation>
			<property>
				<name>performRelease</name>
				<value>true</value>
			</property>
		</activation>
		<build>
			<plugins>
				<plugin>
					<groupId>org.apache.maven.plugins</groupId>
					<artifactId>maven-gpg-plugin</artifactId>
					<version>1.4</version>
					<configuration>
						<passphrase>${gpg.passphrase}</passphrase>
					</configuration>
					<executions>
						<execution>
							<id>sign-artifacts</id>
							<phase>verify</phase>
							<goals>
								<goal>sign</goal>
							</goals>
						</execution>
					</executions>
				</plugin>
			</plugins>
		</build>
	</profile>
</profiles>