JPragma Blog

Two very useful Gradle plugins:

1. axion-release-plugin
https://github.com/allegro/axion-release-plugin

This plugin derives project version from tags in git repository. I use following rules in my projects:

• Start with default version 0.1.0-SNAPSHOT
• Every release of master branch increments second digit
• Production emergency fixes are done on a branch, which is created from the version tag. Such branch name must start with “hotfix-” prefix. Releasing this branch will increment 3rd digit.
• Feature branches must have “topic-” prefix. They are never released, however their version includes feature name.

To check current project version run “gradle currentVersion”
To release the project run “gradle release”

2. gradle-nexus-plugin
https://github.com/bmuschko/gradle-nexus-plugin

This plugin adds ability to upload project artifacts to nexus repository. Simply run “gradle upload”.

Example gradle.build

buildscript {
    repositories {
        maven {url = 'http://repo1.maven.org/maven2'}
    }
}

plugins {
    id 'java'
    id 'pl.allegro.tech.build.axion-release' version '1.3.4'
    id 'com.bmuschko.nexus' version '2.3.1'
}

scmVersion {
    versionIncrementer 'incrementMinor'
    branchVersionIncrementer = [
            'hotfix-.*' : { c -> c.currentVersion.incrementPatchVersion() }
    ]
    branchVersionCreator = [
            'topic-.*' : 'versionWithBranch'
    ]
}

group 'com.jpragma.myproject'
version = scmVersion.version

repositories {
    jcenter {url = 'http://jcenter.bintray.com/'}
}

dependencies {
    compile 'org.slf4j:slf4j-api:1.7.21'
    testCompile 'junit:junit:4.12'
}

nexus {
    sign = false
    repositoryUrl = 'http://localhost:8081/nexus/content/repositories/internal/'
    snapshotRepositoryUrl = 'http://localhost:8081/nexus/content/repositories/internal-snapshots/'
}