How to commit/push a Git tag with Gradle?

Question

I have created a specific Gradle task that should only be called in the Jenkins build system. I need to make this task depend on another one which should tag the HEAD of the master branch after a successful compilation of the project.

I have no idea how can I commit/push/add tags to a specific branch in remote repository using Gradle. What's the easiest way to achieve this?

Any help is really appreciated...

Answer 1

Here's how you can implement your scenario with the Gradle Git plugin. The key is to look at the provided Javadocs of the plugin.

buildscript {
   repositories { 
      mavenCentral() 
   }

   dependencies { 
      classpath 'org.ajoberstar:gradle-git:0.6.1'
   }
}

import org.ajoberstar.gradle.git.tasks.GitTag
import org.ajoberstar.gradle.git.tasks.GitPush

ext.yourTag = "REL-${project.version.toString()}"

task createTag(type: GitTag) {
   repoPath = rootDir
   tagName = yourTag
   message = "Application release ${project.version.toString()}"
}

task pushTag(type: GitPush, dependsOn: createTag) {
   namesOrSpecs = [yourTag]
}

Answer 2

I love this:

private void createReleaseTag() {
    def tagName = "release/${project.version}"
    ("git tag $tagName").execute()
    ("git push --tags").execute()
}

---

EDIT: A more extensive version

private void createReleaseTag() {
    def tagName = "release/${version}"
    try {
        runCommands("git", "tag", "-d", tagName)
    } catch (Exception e) {
        println(e.message)
    }
    runCommands("git", "status")
    runCommands("git", "tag", tagName)
}

private String runCommands(String... commands) {
    def process = new ProcessBuilder(commands).redirectErrorStream(true).start()
    process.waitFor()
    def result = ''
    process.inputStream.eachLine { result += it + '\n' }
    def errorResult = process.exitValue() == 0
    if (!errorResult) {
        throw new IllegalStateException(result)
    }
    return result
}

You can handle Exception.