Publishing Android Kotlin library along with source code

Lead paragraph

Publishing an Android Kotlin library with its source jar is a small operational change that typically reduces onboarding time and debugging effort for integrators. This article explains why -sources.jar should be treated as a product feature, how to ship it reliably in CI, the realistic effort involved, and the operational controls teams should add before going public.

Everything You Need to Know About Apple and Google Developer Accounts goes deeper on the ideas above and adds concrete next steps.

Early proof

Attaching a -sources.jar to your artifact is the most direct signal that consumers will get IDE navigation and reproducible stack traces. Below are quick checks you can run and what they mean for your team.

Explanation: verifying the -sources.jar presence takes seconds and is a reliable operational predicate for better first-use experience. Interpretation: teams that add sources and basic CI usually reduce the time integrators spend debugging, but the size of the win depends on your code complexity and the quality of stack traces you already expose. Reader impact: expect initial setup work (roughly 1-3 dev-days) and then mostly low ongoing maintenance, with occasional triage and key-rotation work.

When you move from outline to execution, Publishing Apps Built With Flutter, React Native, or Native helps close common gaps teams hit here.

Why should I publish sources for my Android library?

Publish sources for public SDKs because they usually lower integration friction, speed debugging, and increase trust from adopters. In practice, published sources let consumers step through code in their IDE and produce stack traces tied to real source lines instead of decompiled stubs.

What this means: benefits are typical but not guaranteed - smaller libraries and stable APIs see the biggest wins. If you have highly sensitive algorithms, publishing full sources may not be appropriate; consider publishing only the public API module.

A complementary angle worth comparing lives in Android Keystore Explained Before You Publish.

How do I publish an Android Kotlin library with sources?

A linear flow diagram for this article showing: prepare module (sourcesJar + dokka) → sign artifacts (GPG) → CI push to OSSRH staging → close & release (Nexus) → available on Maven Central. Each node includes the concrete artifact names and CI secret names to set.

Publish sources by adding a sources task and docs artifact, enabling maven-publish and signing, and automating CI to push to OSSRH or your chosen registry. Expect a one-time setup of 1-3 developer days and an initial Sonatype approval step that can take several days depending on backlog.

1. Prepare the Kotlin module and artifacts

   Add a sourcesJar task and a dokkaJar or javadoc artifact so IDEs can link docs. Add a small sample app and a README with coordinates to help integrators get a green build quickly. Typical effort: 0.5-1 day.

2. Add publishing and signing

   Apply the maven-publish and signing Gradle plugins and populate POM fields (name, description, license, developers, scm). Sonatype requires basic metadata and manual groupId approval the first time. Typical effort: 0.5-1.5 days plus Sonatype review time.

3. Automate CI and release flow

   Store SONATYPE_USERNAME, SONATYPE_PASSWORD, and GPG_SIGNING_KEY (or use modern signing workflows) in CI secrets. Add a CI job to push to OSSRH staging and a step to close-and-release the staging repo. Automate the close-and-release action so you avoid manual Nexus UI steps. Typical effort: 0.5-1 day to script and validate.

Failure modes and practical notes: signing key rotation, CI flakiness, or misconfigured POM fields are the most common causes of failed releases. Plan for a quarterly check of secrets and a post-release audit for a few releases to catch issues early.

Alternatives for faster iteration

• JitPack: fast for prototypes; consumers can fetch artifacts from tagged commits. Use it for partner previews but expect to move to Maven Central for production discoverability.
• GitHub Packages: useful for private distribution; less discoverable publicly than Maven Central.

For tradeoffs, checklists, and edge cases, First Mobile App Publishing Checklist for Non-Technical Founders rounds out this section.

What tradeoffs and operational steps should I plan for?

A compact checklist block tailored to this article listing pre-publish items: LICENSE file, POM metadata, sourcesJar task, dokkaJar, CI secrets (SONATYPE, GPG), automated signing, security scan badge, sample app, and CONTRIBUTING.md.

Publishing sources lowers friction but increases public visibility and support expectations, so adopt policies and lightweight operational controls. Expect a bump in issue reports and occasional PRs after the first public release; triage time is typically 1-3 hours per week early on, then lower once contribution rules and automation land.

Mitigations and concrete steps:

• Use modularization to keep sensitive code in closed modules and publish only the public API with sources.
• Add CONTRIBUTING.md, SECURITY.md, and a permissive license (Apache-2.0 or MIT) if you want outside contributions.
• Implement a publishing preflight checklist and automated CI checks for LICENSE, POM fields, sourcesJar, dokkaJar, and security scans.
• Schedule periodic maintenance: key rotations, CI credential audits, and a quarterly production release review.

Compact checklist

• LICENSE file present
• POM metadata populated
• sourcesJar and dokkaJar configured
• CI secrets for publishing and signing
• Automated close-and-release workflow
• Sample app and CONTRIBUTING.md included
• Security scan or SBOM attached

Final practical takeaway: treat sources.jar as part of your product packaging if you want easier integrations, but budget the initial setup and the small amount of ongoing triage and ops work required to keep releases reliable.

How to Publish Your Bolt-Generated Mobile App reframes the same problem with a slightly different lens - useful before you finalize.