My Java app declares its dependencies in a build.sbt file using Scala syntax and has them cached in an Ivy directory. Yours declares them in a pom file using XML syntax and has them cached in a Maven directory. Neither of us even tries to do lockfiles and instead just has the CI server build an "uber jar" with all the dependencies bundled in.

I get why Python needs lockfiles, but goddamn, that need is a symptom of the mess of managing Python dependencies.

There's still a long way to go - I use Airflow for ETL management, and I'm using pipenv to manage it - except Pipenv can't create a lockfile because a dependency of a dependency of Airflow requires in flask-wtf <= 0.7, while another dependency of a dependency requires ==0.8

In a Maven pom.xml I can easily exclude or override the conflicting dependency manually if needed, but I can't in a Pipfile.

Well, that seems naive. Almost 1/4th of Maven Central libraries broke binary compatibility in patch updates: https://avandeursen.com/2014/10/09/semantic-versioning-in-ma...

Netflix, at least, doesn't agree that Java doesn't need lockfiles: https://github.com/nebula-plugins/gradle-dependency-lock-plu...

Yes, which is part of the reason why lots of Java projects almost never update their dependencies, because no one remembers why that version was chosen. Splitting what you want from what you have is important to communicate this.

> There's still a long way to go - I use Airflow for ETL management, and I'm using pipenv to manage it - except Pipenv can't create a lockfile because a dependency of a dependency of Airflow requires in flask-wtf <= 0.7, while another dependency of a dependency requires ==0.8

I'm not sure what you expect it would be able to do here...

Most shops I know use one of maven or gradle. I can’t think of any other serious contenders in Java (if you still use ant: please consider alternatives).

Poetry looks like it did just that though and I'm warming up to it at a very high speed.

Boot, and Lein. I'm partial to boot lately.