Perform a Release

Introduction#

The standard Maven plugin used by a Release Process is the maven-release-plugin – the configuration for this plugin is minimal:

SCM in the Maven pom:The Release process will interact with the Source Control of the project – this means we need to define the “scm” element in our pom.xml.The “scm” element for a release build should contain enough information to check out the tag that was created for this release.

Remarks#

Note: Make sure to use maven release plugin 2.5 or later to avoid maven related issues. The Release Process

mvn release:clean

The above command will perform the below : delete the release descriptor (release.properties) delete any backup POM files

mvn release:prepare

Next part of the Release process is Preparing the Release; this will: perform some checks – there should be no uncommitted changes and the project should depend on no SNAPSHOT dependencies change the version of the project in the pom file to a full release number (remove SNAPSHOT suffix) – in our example – 0.0.1 run the project test suites commit and push the changes create the tag out of this non-SNAPSHOT versioned code increase the version of the project in the pom – in our example – 0.0.2-SNAPSHOT commit and push the changes

mvn release:perform

The latter part of the Release process is Performing the Release; this will: checkout release tag from SCM build and deploy released code This second step of the process relies on the output of the Prepare step – the release.properties.

POM.xml to perform release to Nexus repository

<project xmlns="https://maven.apache.org/POM/4.0.0" xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>org.codezarvis.artifactory</groupId>
<artifactId>nexusrelease</artifactId>
<version>0.0.5-SNAPSHOT</version>
<packaging>jar</packaging>

<name>nexusrelease</name>
<url>https://maven.apache.org</url>

<scm>
<connection>scm:git:git@github.com:isudarshan/nexuspractice.git</connection>
<url>scm:git:git@github.com:isudarshan/nexuspractice.git</url>
<developerConnection>scm:git:git@github.com:isudarshan/nexuspractice.git</developerConnection>
<tag>HEAD</tag>
</scm>

<distributionManagement>
<!-- Publish the versioned snapshot here -->
<repository>
<id>codezarvis</id>
<name>codezarvis-nexus</name>
<url>https://localhost:8080/nexus/content/repositories/releases</url>
</repository>

<!-- Publish the versioned releases here -->
<snapshotRepository>
<id>codezarvis</id>
<name>codezarvis-nexus</name>
<url>https://localhost:8080/nexus/content/repositories/snapshots</url>
</snapshotRepository>
</distributionManagement>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>

<build>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-release-plugin</artifactId>
<version>2.5.2</version>
<executions>
<execution>
<id>default</id>
<goals>
<goal>perform</goal>
</goals>
<configuration>
<pomFileName>${project.name}/pom.xml</pomFileName>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>