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Use packages from Maven Central

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Azure DevOps Services | Azure DevOps Server 2022 - Azure DevOps Server 2019

Using Azure Artifacts upstream sources allows you to use a single feed for hosting both the packages you produce and packages from public registries such as Maven Central. When you add upstream sources to your feed, Azure Artifacts saves a copy of any package installed from upstream. This ensures continued accessibility for your development, even if a public registry suffers an outage. Additionally, Azure Artifacts supports various other Maven upstream sources, including the Google Maven Repository, Gradle Plugins, and JitPack.

Prerequisites

  • An Azure DevOps organization and a project. Create an organization or a project if you haven't already.

  • An Azure Artifacts feed.

Note

Maven snapshots are not supported with Maven upstream sources.

Enable upstream sources

If you don't have a feed already, follow these instructions to create one, and make sure that you check the upstream sources checkbox to enable them. If you already have a feed, move to the next step to add Maven Central as an upstream source.

  1. Sign in to your Azure DevOps organization and navigate to your project.

  2. Select Artifacts, and then select Create Feed.

  3. Provide a Name for your feed, choose the Visibility option that defines who can view your packages, check Include packages from common public sources if you want to include packages from sources like nuget.org or npmjs.com, and for Scope, decide whether the feed should be scoped to your project or the entire organization.

  4. Select Create when you're done.

    Screenshot that shows selections for creating a new feed in Azure DevOps Services.

  1. Sign in to your Azure DevOps server, and then go to your project.

  2. Select Artifacts, and then select Create Feed.

  3. Provide a Name for your feed, choose the Visibility option that defines who can view your packages, check Include packages from common public sources if you want to include packages from sources like nuget.org or npmjs.com, and for Scope, decide whether the feed should be scoped to your project or the entire organization.

  1. Select Create when you're done.

    Screenshot that shows selections for creating a new feed in Azure DevOps 2022.

  1. Select Create when you're done.

    Screenshot that shows selections for creating a new feed in Azure DevOps 2020.

  1. Sign in to your Azure DevOps server, and then go to your project.

  2. Select Artifacts, and then select New feed.

  3. For Name, enter a descriptive name for your feed.

    For Visibility, select an option to indicate who can view packages within the feed.

    If you want to include packages from public sources, select the Use packages from public sources through this feed option.

  4. Select Create when you're done.

    Screenshot that shows selections for creating a new feed in Azure DevOps 2019.

Note

By default, newly created feeds have their project's Build Service value set to Feed and Upstream Reader (Collaborator).

Add Maven Central upstream

If you checked the upstream sources checkbox when creating your feed, Maven Central should already be added as an upstream source. If not, you can add it manually using the following steps:

  1. Sign in to your Azure DevOps organization, and then navigate to your project.

  2. Select Artifacts, and then select the gear icon in the top right corner to navigate to your Feed Settings.

  3. Select Upstream sources, and then select Add Upstream.

  4. Select Public source, select Maven Central (https://repo.maven.apache.org/maven2/) from the dropdown menu, and then select Add when you're done.

    A screenshot showing how to add Maven central upstream source.

  5. Select Save in the top right corner to save your changes.

    A screenshot showing how to save upstream sources.

Save package from Maven Central

Before saving packages from Maven Central, make sure you have set up your project to connect to your feed. If you haven't done so already, follow the instruction in the project setup to set up your Maven project and connect to your feed.

In this example, we'll save the Kotlin Datetime Library from Maven Central.

  1. Navigate to Maven Central at https://mvnrepository.com/.

  2. Search for the Kotlin Datetime Library. Select the Kotlinx Datetime package, and then select the version you wish to install.

  3. Copy the <dependency> snippet from the Maven tab.

    <dependency>
    <groupId>org.jetbrains.kotlinx</groupId>
    <artifactId>kotlinx-datetime-jvm</artifactId>
    <version>0.4.1</version>
    <scope>runtime</scope>
</dependency>

  4. Open your pom.xml file and paste the snippet inside your <dependencies> tag, and then save your file.

  5. Run the following command from the same path as your pom.xml file to install your dependencies:

    mvn install

Note

To save packages from upstreams, you must have the Feed and Upstream Reader (Collaborator) role or higher. See Manage Permissions for more details.

View saved packages

You can view the packages you saved from upstreams by selecting the Maven Central source from the dropdown menu.

  1. Sign in to your Azure DevOps organization, and then navigate to your project.

  2. Select Artifacts, and then select your feed from the dropdown menu.

  3. Select Maven Central from the source dropdown menu to filter for packages from this upstream.

  4. The Kotlinx Datetime package that we saved in the previous step, is now available in our feed. Azure Artifacts automatically saved a copy to our feed when we executed the mvn install command.

A screenshot showing a package that was saved from Maven Central.

Tip

If Maven is not downloading all your dependencies, run the following command from the project directory to regenerate your project's files: mvn eclipse:eclipse -DdownloadSources=true -DdownloadJavadocs=true