Maven: bumpVersion update child pom.xml versions in multi module projects

[loadi-dev]

How are you running Renovate?

Self-hosted

If you're self-hosting Renovate, tell us what version of Renovate you run.

32.6.1

Please select which platform you are using if self-hosting.

GitLab self-hosted

If you're self-hosting Renovate, tell us what version of the platform you run.

14.8.3

Was this something which used to work for you, and then stopped?

I never saw this working

Describe the bug

Steps to reproduce

• Set up a repository with a multi maven project with at least one child
• The child should reference the parent
  • (Background: I use the parent to manage versions for all childs.)
• Activate bumpVersion for that repository
• Make renovate update a dependency in the parents POM (e.g. set an older version)

Current behavior

• Renovate updates the outdated dependency
• Renovate bumps the version of the parent POM
• Renovate is not updating the reference to the parent in the child POM
  • Missing this out is breaking the hierarchical structure of my multi maven projects

Expected behavior

• I'd expect the version bump to update the version as if I'd run mvn versions:set.

Remark
Maybe this is not a bug but an unsupported feature. In that case I'd be glad if this ticket could be converted into a feature request.

Relevant debug logs

Logs

``` INFO: Repository started (repository=golatar-projects/golatar-libs) "renovateVersion": "32.6.1" INFO: Dependency extraction complete (repository=golatar-projects/golatar-libs) "baseBranch": "main", "stats": { "managers": { "gitlabci": {"fileCount": 1, "depCount": 2}, "maven": {"fileCount": 5, "depCount": 25} }, "total": {"fileCount": 6, "depCount": 27} } INFO: Branch created (repository=golatar-projects/golatar-libs, branch=renovate/hibernate.version) "commitSha": "f3fb6c5ba927976a46bb38[37](https://source.16reiche.de/ops/renovate-bot/-/jobs/17819#L37)f6f729da11590308" INFO: PR created (repository=golatar-projects/golatar-libs, branch=renovate/hibernate.version) "pr": 1[51](https://source.16reiche.de/ops/renovate-bot/-/jobs/17819#L51), "prTitle": "Update hibernate.version to v5.6.7.Final" INFO: Repository finished (repository=golatar-projects/golatar-libs) "durationMs": 19576 ```

Have you created a minimal reproduction repository?

No reproduction repository

[github-actions]

Hi there,

Help us by making a minimal reproduction repository.

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To get started, please read our guide on creating a minimal reproduction to understand what is needed.

We may close the issue if you (or someone else) have not provided a minimal reproduction within two weeks. If you need more time, or are stuck, please ask for help or more time in a comment.

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[loadi-dev]

Hi,
I created a repository for reproduction here: https://github.com/loadi-dev/renovate-bumpversion-demo.

I added a minified config.js from my GitLab instance. But I'm not quite sure how to configure it properly on GitHub. The essential parts in my eyes are:

• Make renovate to handle maven
• Make renovate to bump the version (bumpVersion: 'patch')

When running renovate on such a repository it will bump the version in the parents perfectly fine, but the child will still refer to the old version. So the updated dependencies will not be effective in the end.

Please feel free to reach out, if you need any additional information.

[rarkins]

Please enhance the reproduction to include in the README a description of (a) expected behavior and (b) observed behavior. Ideally (b) should reference a PR in the same repo which shows the current behavior.

[loadi-dev]

Thanks for your feedback. I updated the repository. Let me know if anything else is missing.

[rarkins]

Thanks. The PR shown in your demo is updating the version in the updated Pom.xml exactly as intended/described, so most likely anything beyond that is a feature request and not a bug. Can you add a new commit manually on top of the automated PR to show the changes/differences you'd expect?

[loadi-dev]

I updated the PR accordingly.

• loadi-dev/renovate-bumpversion-demo@d6fbe3d shows the changes made by renovate.
• loadi-dev/renovate-bumpversion-demo@405b433 shows the changes I'd expect to happen in addition.

In my opinion the version bump is incomplete for multi module projects. The updated dependency will never be used in the sub module. To work around that I'd need to define the dependency versions in the modules instead of having a central version definition in the parent. This would do for the minimum example, but not for projects with more than one child, sharing some common libraries.

[rarkins]

Thanks. You are welcome to submit a documentation PR in the meantime to clarify in our docs that multi module projects aren't currently supported for bumpVersion.

[sta-szek]

i think the fastest implementation would be to replace this line of code:

renovate/lib/modules/manager/maven/update.ts

Line 112 in e978437

bumpedContent = replaceAt(

with smth like mvn versions:set -DnewVersion=${newValue} -DprocessAllModules -DgenerateBackupPoms=false if that is possible to call another cmd