Wrapper Upgrade Gradle Plugin

The Wrapper Upgrade Gradle Plugin creates tasks to upgrade the Gradle Wrapper for target projects hosted on GitHub.

Prerequisites

To run the upgrade tasks, you'll need:

• Java 8 or later.

• Git. The plugin uses Git commands to commit, create branches, and push changes.

  • Git author identity: Make sure your Git author identity is configured. You can set this with:

    git config --global user.name "Your Name"
    git config --global user.email "your.email@example.com"

    Using GPG Signing (Optional): If you use GitHub Actions and want to sign your commits with GPG, you can use the crazy-max/ghaction-import-gpg action. This action imports your GPG key and configures the Git author identity.

    - name: Import GPG key
      uses: crazy-max/ghaction-import-gpg@cb9bde2e2525e640591a934b1fd28eef1dcaf5e5
      with:
        gpg_private_key: ${{ secrets.MY_GPG_PRIVATE_KEY }}
        passphrase: ${{ secrets.MY_GPG_PASSPHRASE }}
        git_user_signingkey: true
        git_commit_gpgsign: true
        git_config_global: true

  • Git credentials: If you use GitHub Actions, you can configure your Git credentials from a GitHub token with this trick:

    - name: Set up Git credentials
      env:
        TOKEN: ${{ secrets.GITHUB_TOKEN }}
      run: git config --global url."https://unused-username:${TOKEN}@github.com/".insteadOf "https://github.com/"

Usage

Apply the plugin to a dedicated project and configure which project needs to be upgraded. Example:

Kotlin DSL

plugins {
    id("base")
    id("org.gradle.wrapper-upgrade") version "0.12"
}

wrapperUpgrade {
    gradle {
        register("some-gradle-project") {
            repo.set("my-org/some-gradle-project")
            baseBranch.set("release")
        }
        register("some-samples-gradle-project") {
            repo.set("my-org/some-samples-gradle-project")
            dir.set("samples")
        }
    }

    maven {
        register("some-maven-project") {
            repo.set("my-org/some-maven-project")
            baseBranch.set("release")
        }
        register("some-samples-maven-project") {
            repo.set("my-org/some-samples-maven-project")
            baseBranch.set("samples")
        }
    }
}

Groovy DSL

plugins {
    id 'base'
    id 'org.gradle.wrapper-upgrade' version '0.11.4'
}

wrapperUpgrade {
    gradle {
        'some-gradle-project' {
            repo = 'my-org/some-gradle-project'
            baseBranch = 'release'
        }
        'some-samples-gradle-project' {
            repo = 'my-org/some-samples-gradle-project'
            dir = 'samples'
        }
    }

    maven {
        'some-maven-project' {
            repo = 'my-org/some-maven-project'
            baseBranch = 'release'
        }
        'some-samples-maven-project' {
            repo = 'my-org/some-samples-maven-project'
            dir = 'samples'
        }
    }
}

This will create one task per configured project and 2 aggregating tasks: upgradeGradleWrapperAll and upgradeMavenWrapperAll that will run all the specific tasks.

Running ./gradlew upgradeGradleWrapperXXX will:

• clone the project XXX in build/git-clones
• run in the cloned project ./gradlew wrapper --gradle-version=<latest_gradle_version>
• run a second time ./gradlew wrapper --gradle-version=<latest_gradle_version>
• If changes occurred
  • create a specific branch
  • commit and push the branch
  • create a pull request on GitHub, it requires a GitHub personal access token (PAT), passed with WRAPPER_UPGRADE_GIT_TOKEN environment variable. This token is used to get the existing PRs on the repo and create one if needed, hence it requires:
    • the repo scope for a classic PAT
    • read-write permissions for "Pull requests" on the relevant repos for a fine-grained PAT

Note that a check is done first to make sure the branch does not exist yet. That way you can run upgradeGradleWrapperAll and upgradeMavenWrapperAll periodically with a cron, CI job... a bit like dependabot does for upgrading libs.

Running upgradeMavenWrapperXXX will do the same, executing ./mvnw wrapper:wrapper -Dmaven=<latest_maven_version> instead.

Configuration

wrapperUpgrade {
    <gradle|maven> {
        name {
            repo = ...
            baseBranch = ...
            dir = ...
            options {
                gitCommitExtraArgs = [...]
                allowPreRelease = true
                labels = ['dependencies']
                assignees = ['alextu']
                reviewers = ['StefMa']
                recreateClosedPullRequest = true
            }
        }
    }
}

Field	description
name	A name identifying the upgrade, it can be different from the project name, for example when you need to upgrade multiple gradle projects in the same git project
repo	The GitHub repository to clone, format 'organization/project`
dir	The directory inside the project base directory to run the gradle or maven upgrade in
baseBranch	The git branch to checkout and that the pull request will target
options.gitCommitExtraArgs	List of additional git commit arguments
options.allowPreRelease	Boolean: true will get the latest Maven/Gradle version even if it's a pre-release. Default is false.
options.labels	Optional list of label (names) that will be added to the pull request.
options.assignees	Optional list of GitHub usernames that will be added as assignees to the pull request.
options.reviewers	Optional list of GitHub usernames that will be added as reviewers to the pull request.
options.recreateClosedPullRequest	Boolean: true will recreate the pull request if a closed pull request with the same branch name exists. false will not recreate the pull request. Default is false.

License

The Wrapper Upgrade Gradle Plugin is open-source software released under the Apache 2.0 License.