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sbt-sonatype plugin

A sbt plugin for publishing your project to the Maven central repository through the REST API of Sonatype Nexus. Deploying artifacts to Sonatype repository is a requirement for synchronizing your projects to the Maven central repository. sbt-sonatype plugin enables two-step release of your Scala/Java projects.

After these steps, your project will be synchronized to the Maven central within ten minutes. No longer need to enter the web interface of Sonatype Nexus repository to perform these release steps.

Prerequisites

Configurations

Maven Central

project/plugins.sbt

Import sbt-sonatype plugin and sbt-pgp plugin to use sonatypeBundleRelease and publishSigned commands:

// For sbt 1.x (sbt-sonatype 2.3 or higher)
addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "(version)")
addSbtPlugin("com.github.sbt" % "sbt-pgp" % "2.1.2")

// For sbt 0.13.x (upto sbt-sonatype 2.3)
addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "(version)")
addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.0.0")

build.sbt

Hosts other than Sonatype Central

⚠️ Legacy Host

By default, this plugin is configured to use the legacy Sonatype repository oss.sonatype.org. If you created a new account on or after February 2021, add sonatypeCredentialHost settings:

// For all Sonatype accounts created on or after February 2021
import xerial.sbt.Sonatype.sonatype01

ThisBuild / sonatypeCredentialHost := sonatype01

Sonatype Central Host

As of early 2024, Sonatype has switched all new account registration over to the Sonatype Central portal and legacy sonatype.org accounts will eventually migrate there. To configure sbt to publish to the Sonatype Central portal, simply add the following:

import xerial.sbt.Sonatype.sonatypeCentralHost

ThisBuild / sonatypeCredentialHost := sonatypeCentralHost

Usage

To use sbt-sonatype, you need to create a bundle of your project artifacts (e.g., .jar, .javadoc, .asc files, etc.) into a local folder specified by sonatypeBundleDirectory. By default, the folder is (project root)/target/sonatype-staging/(version). Add the following publishTo setting to create a local bundle of your project:

publishTo := sonatypePublishToBundle.value

With this setting, publishSigned will create a bundle of your project to the local staging folder. If the project has multiple modules, all of the artifacts will be assembled into the same folder to create a single bundle.

If isSnapshot.value is true (e.g., if the version name contains -SNAPSHOT), publishSigned task will upload files to the Sonatype Snapshots repository without using the local bundle folder.

If necessary, you can tweak several configurations:

    val sonatypeCentralDeploymentName =
  settingKey[String]("Deployment name. Default is <organization>.<artifact_name>-<version>")
// [Optional] If you need to manage the default Sonatype Central deployment name, change the setting below. 
// If publishing multiple modules, ensure that this is set on the module level, rather than on the build level.
sonatypeCentralDeploymentName := s"${organization.value}.${name.value}-${version.value}"

// [Optional] The local staging folder name:
sonatypeBundleDirectory := (ThisBuild / baseDirectory).value / target.value.getName / "sonatype-staging" / (ThisBuild / version).value

// [Optional] If you need to manage unique session names by yourself, change this default setting:
sonatypeSessionName := s"[sbt-sonatype] ${name.value} ${version.value}"

// [Optional] Timeout until giving up sonatype close/promote stages. Default is 60 min.
sonatypeTimeoutMillis := 60 * 60 * 1000 

// [If you cannot use bundle upload] Use this setting when you need to uploads artifacts directly to Sonatype
// With this setting, you cannot use sonatypeBundleXXX commands
publishTo := sonatypePublishTo.value

// [If necessary] Settings for using custom Nexus repositories:
sonatypeCredentialHost := "s01.oss.sonatype.org"
sonatypeRepository := "https://s01.oss.sonatype.org/service/local"

$HOME/.sbt/(sbt-version 0.13 or 1.0)/sonatype.sbt

For the authentication to Sonatype API, you need to set your Sonatype token information (name and password) in the global sbt settings. To protect your password, never include this file within your project. Get the token from https://oss.sonatype.org or https://s01.oss.sonatype.org.

credentials += Credentials("Sonatype Nexus Repository Manager",
        "oss.sonatype.org",
        "(Sonatype token user name)",
        "(Sonatype token password)")

(project root)/sonatype.sbt

sbt-sonatype is an auto-plugin, which will automatically configure your build. There are a few settings though that you need to define by yourself:

Example settings:

// Your profile name of the sonatype account. The default is the same with the organization value
sonatypeProfileName := "(your organization. e.g., org.xerial)"

// To sync with Maven central, you need to supply the following information:
publishMavenStyle := true

// Open-source license of your choice
licenses := Seq("APL2" -> url("http://www.apache.org/licenses/LICENSE-2.0.txt"))

// Where is the source code hosted: GitHub or GitLab?
import xerial.sbt.Sonatype._
sonatypeProjectHosting := Some(GitHubHosting("username", "projectName", "user@example.com"))
// or
sonatypeProjectHosting := Some(GitLabHosting("username", "projectName", "user@example.com"))

// or if you want to set these fields manually
homepage := Some(url("https://(your project url)"))
scmInfo := Some(
  ScmInfo(
    url("https://github.com/(account)/(project)"),
    "scm:git@github.com:(account)/(project).git"
  )
)
developers := List(
  Developer(id="(your id)", name="(your name)", email="(your e-mail)", url=url("(your home page)"))
)

Publishing Your Artifact

The basic steps for publishing your artifact to the Central Repository are as follows:

Note: If your project version has "SNAPSHOT" suffix, your project will be published to the snapshot repository of Sonatype, and you cannot use sonatypeBundleUpload or sonatypeRelease command.

Commands

Multi-Step Commands:

Usually, we only need to run sonatypeBundleRelease command in sbt-sonatype:

Individual Step Commands

Batch Operations

Other Commands

Advanced Build Settings

Sequential Upload Release (Use this for small projects)

> ; publishSigned; sonatypeBundleRelease

For cross-building projects, use + publishSigned:

> ; + publishSigned; sonatypeBundleRelease

Parallelizing Builds When Sharing A Working Folder

When you are sharing a working folder, you can parallelize publishSigned step for each module or for each Scala binary version:

Parallelizing Builds When Not Sharing Any Working Folder

If you are not sharing any working directory (e.g., Travis CI), to parallelize the release process, you need to publish a bundle for each build because Sonatype API only supports uploading one bundle per a staging repository.

Here is an example to parallelize your build for each Scala binary version:

For sbt-sonatype 2.x:

Using with sbt-release plugin

To perform publishSigned and sonatypeBundleRelease with sbt-release plugin, define your custom release process as follows:

import ReleaseTransformations._

releaseCrossBuild := true // true if you cross-build the project for multiple Scala versions
releaseProcess := Seq[ReleaseStep](
  checkSnapshotDependencies,
  inquireVersions,
  runClean,
  runTest,
  setReleaseVersion,
  commitReleaseVersion,
  tagRelease,
  // For non cross-build projects, use releaseStepCommand("publishSigned")
  releaseStepCommandAndRemaining("+publishSigned"),
  releaseStepCommand("sonatypeBundleRelease"),
  setNextVersion,
  commitNextVersion,
  pushChanges
)

Publishing Maven Projects

If your Maven project (including Gradle, etc.) is already deployed to the staging repository of Sonatype, you can use sbt sonatypeReleaseAll (sonatypeProfileName) command for the synchronization to the Maven central (Since version 0.5.1).

Prepare the following two files:

$HOME/.sbt/(sbt-version 0.13 or 1.0)/plugins/plugins.sbt

addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "(version)")

$HOME/.sbt/(sbt-version 0.13 or 1.0)/sonatype.sbt

credentials += Credentials("Sonatype Nexus Repository Manager",
        "oss.sonatype.org",
        "(Sonatype user name)",
        "(Sonatype password)")

Alternatively, the credentials can also be set with the environment variables SONATYPE_USERNAME and SONATYPE_PASSWORD.

Then, run sonatypeReleaseAll command by specifying your sonatypeProfileName. If this is org.xerial, run:

$ sbt "sonatypeReleaseAll org.xerial"

For sbt-sonatype developers

Releasing sbt-sonatype to Sonatype:

## Add a new git tag
$ git tag v3.9.x
$ ./sbt
> publishSigned
> sonatypeBundleRelease
```