OpenAPITools/openapi-generator

Add scalafmt (plugin) to scala (client/server) generators

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#23274 opened on Mar 17, 2026

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Client: ScalaServer: Scalahelp wanted

Description

Add scalafmt (plugin) to scala (client/server) generators

A good reference PR is https://github.com/OpenAPITools/openapi-generator/pull/23273

Please submit a PR if you would like to help with this task

Contributor guide

Tech stack
scala
Domain
api
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Basic knowledge of ScalaFamiliarity with OpenAPI generator's template systemUnderstanding of how code generation plugins work
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70
Research direction
Start by reviewing the reference PR #23273 which added a similar plugin for TypeScript generators. Look at the Scala generator classes in the codebase, such as `ScalaClientCodegen` and `ScalaServerCodegen`, to understand how existing plugins are configured. Also check the build configuration (e.g., `build.gradle`) to see how dependencies and tasks are added. The issue requires adding scalafmt as a plugin that runs formatting on generated Scala code, similar to how the TypeScript counterpart is done.