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@@ -48,22 +48,22 @@ Thank you! We look forward to reading your applications!
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### Build Server Protocol: add Kotlin support [Hard, 350 hrs]
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The Kotlin team wants to expand official Kotlin support not only for Gradle and Maven build systems,
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but any other build system as well and support them natively in JetBrains IDE with minimal effort.
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On the other hand, we also want to provide basic Kotlin support in non-JetBrains IDE
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one part of such support is to be able to get Kotlin specific information from any build system supporting Kotlin.
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but any other build system as well and support them natively in JetBrains IDEs with minimal effort.
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On the other hand, we also want to provide basic Kotlin support in non-JetBrains IDEs
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one part of such support is being able to get Kotlin-specific information from any build system supporting Kotlin.
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The solution to these requirements could be a [Build Server Protocol](https://build-server-protocol.github.io) (BSP)
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that provides an abstraction layer between build system and IDE.
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which provides an abstraction layer between the build system and IDE.
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The goal of this project would be implementing a prototype which uses the BSP protocol to get all required for
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IDEA information from a user project to be able to work with Kotlin code in the project.
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To limit the scope of this prototype user project will be using Gradle to build itself.
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The goal of this project would be implementing a prototype which uses the BSP protocol to get all the required
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information for IntelliJ IDEA from a user project so that it will be possible to work with Kotlin code in the project.
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To limit the scope of this prototype, the user project will use Gradle to build itself automatically.
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**Skills required (preferred)**
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**Preferred skills**
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* Kotlin
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* Understanding how to write Gradle plugins
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* _Bonus_: understanding how to write IntelliJ IDEA plugins
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* Knowledge of Kotlin
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* Understanding of how to write Gradle plugins
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* _Bonus_: understanding of how to write plugins for IntelliJ IDEA
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**Possible mentors**
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* **Task #2**.
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Practice assignment:
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create a Gradle plugin which exposes a specific task. This task should on the presence of
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Kotlin Gradle Plugin get all the Kotlin sources structure and output to the file. Having tests is a bonus
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Create a Gradle plugin which exposes a specific task. This task should, in the presence of the Kotlin Gradle Plugin, retrieve all the Kotlin sources’ structures and output them.
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Including tests would be a bonus.
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### Support Android and iOS targets in Kotlin Multiplatform for an existing Google service [Medium, 175 hrs]
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This project aims to create an open-source Kotlin Multiplatform (KMP) library that supports an existing Google service
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on at least Android and iOS. This project will showcase best practices in creating KMP libraries for existing services,
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with a focus on appropriate production implementation (for example, proper API key management, allowing user-managed API keys,
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client throttling).
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on at least Android and iOS. It will showcase best practices in creating KMP libraries for existing services,
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with a focus on appropriate production implementation (for example, proper API key management, user-managed API keys support,
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and client throttling).
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**Expected outcomes**
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* A new Kotlin Multiplatform library with support for an existing Google service
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* Sample code and documentation
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**Skills required (preferred)**
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**Preferred skills**
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* Kotlin
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* Kotlin Multiplatform
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* Mobile development (Android and iOS)
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**Possible mentor**
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**Possible mentors**
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Matt Dyor, and the Google team
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### Add Kotlin Multiplatform support in Bazel [Hard, 350 hrs]
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Bazel's support for Kotlin is evolving, but proper Kotlin Multiplatform (KMP) integration remains a challenge.
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This project aims to improve [Bazel's KMP support](https://github.com/bazelbuild/rules_kotlin/issues/567)
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by addressing dependency resolution issues, enhancing `rules_kotlin` and `rules_jvm_external` compatibility,
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by addressing dependency resolution issues, enhancing `rules_kotlin` and `rules_jvm_external` compatibility,
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and enabling cross-platform builds.
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Key improvements will focus on handling platform-specific dependencies (expect/actual mechanisms),
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* Improved integration with `rules_kotlin` and `rules_jvm_external`
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* A working KMP build setup in Bazel for seamless multiplatform development
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**Skills required (preferred)**
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**Preferred skills**
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* Kotlin Multiplatform and Gradle
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* Bazel build system
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* Dependency resolution strategies
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**Possible mentor**
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**Possible mentors**
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Shauvik Roy Choudhary, and the Uber team
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### Kotlin Language Server (LSP) [Hard, 350 hrs]
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The Language Server Protocol (LSP) is a widely adopted standard that enables code intelligence features such as autocompletion,
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go-to definition, and refactoring across different editors and IDEs. There is currently no official Kotlin LSP server.
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Uber has developed an internal Kotlin LSP, but a publicly maintained, community-driven implementation
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can support broader use cases, including code migration, AI-powered code assistance,
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and seamless integration into various development environments.
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go-to definition, and refactoring across different editors and IDEs. While there is currently no official Kotlin LSP server,
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Uber has developed an internal Kotlin LSP. A publicly maintained, community-driven implementation can support broader use cases,
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including code migration, AI-powered code assistance, and seamless integration into various development environments.
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This project aims to develop a Kotlin LSP implementation, ensuring compatibility with key LSP features
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and broadening Kotlin's accessibility across development environments.
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Develop a Kotlin LSP implementation
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**Skills required (preferred)**
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**Preferred skills**
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* Kotlin
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* Language Server Protocol (LSP)
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* Plugin or extension development for IDEs
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**Possible mentor**
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**Possible mentors**
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Shauvik Roy Choudhary, and the Uber team
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Developing a Gradle plugin that is compatible with the new Maven Central publication APIs would help
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the library authors building with Gradle to have a smooth experience with the new process.
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Currently, there are multiple implementations of Maven Central publishing plugins in Gradle,
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for example, the [Maven Publish Plugin](https://docs.gradle.org/current/userguide/publishing_maven.html)
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Currently, there are multiple implementations of Maven Central publishing plugins in Gradle, for example, the [Maven Publish Plugin](https://docs.gradle.org/current/userguide/publishing_maven.html)
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or the [New Maven Central Publishing](https://github.com/GradleUp/nmcp), which already tries to adopt the new APIs.
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A potential contributor, during the application or the community bonding phase, would need to review the implementations
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and suggest a plugin to be updated, or decide to build a new plugin or fork.
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During the application or the community bonding phase, a potential contributor would need to review the implementations
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and either suggest an existing plugin to update or decide to build a new plugin or fork.
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The deliverables would include either a new version of an existing plugin for Maven Central publishing or a new plugin for Gradle.
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We anticipate the implementation to be in Kotlin or Java and to have proper test coverage and documentation.
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Additional deliverables may include Kotlin DSL extensions to simplify the use of the plugins and
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* Updated Maven Central publishing plugin or a new plugin
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**Skills required (preferred)**
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**Preferred skills**
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* Kotlin
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* Gradle
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* Maven Repositories
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**Possible mentor**
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**Possible mentors**
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Oleg Nenashev, and the Gradle team
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that greatly extends the configuration cache to further improve performance, particularly the performance of
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Android Studio and IntelliJ IDEA sync. From the developer experience standpoint, it is one of the most expected features in Gradle.
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One of the problems for Isolated projects is the lock contention in the Gradle core and plugins sometimes getting in the way of parallel execution.
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One of the problems for Isolated projects is the lock contention in the Gradle core, with plugins sometimes getting in the way of parallel execution.
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We would like to reduce the lock contention, especially in the key Gradle Build Tool plugins for Java, Kotlin, Android,
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and Kotlin Multiplatform ecosystems. Contributors are welcome to choose the deliverables, based on their interest and the desired project size.
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and Kotlin Multiplatform ecosystems. Contributors are welcome to choose the deliverables based on their interests and the desired project size.
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Potential deliverables include but not limited to:
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* Embed the [Configuration Cache Report](https://github.com/gradle/configuration-cache-report) tool into the Gradle Profiler (or implement a GitHub Action for it)
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Potential deliverables include but are not limited to:
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* Embed the [Configuration Cache Report](https://github.com/gradle/configuration-cache-report) tool into the Gradle Profiler (or "implement a GitHub Action for it")
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* Profile Gradle and a few popular Gradle plugins in various projects, with automation of the test suite on GHA
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* Determine potential areas and plugins where lock contention can be reduced, with or without Configuration Cache
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* While around, contribute to other areas of [Configuration Cache compatibility](https://github.com/gradle/gradle/issues/13490) in the target plugins
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Implementing extensibility features in the Kotlin DSL for Gradle and improving support for common project integrations
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**Skills required (preferred)**
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**Preferred skills**
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* Kotlin
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* Java
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* Performance analysis
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**Possible mentor**
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**Possible mentors**
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Oleg Nenashev, Laura Kassovic
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### Gradle convention plugin for developing Jenkins plugins [Easy to Hard, 90 hrs to 350 hrs]
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There are more than 50 Jenkins plugins that are implemented with Gradle.
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There is a [Gradle JPI plugin](https://github.com/jenkinsci/gradle-jpi-plugin),
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but it is not fully compliant with Jenkins hosting requirements, and needs an update.
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but it is not fully compliant with Jenkins hosting requirements and needs an update.
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In this project idea, the aim would be to recover the Gradle developer flow for Jenkins, reach feature parity with the
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Apache Maven flow ([Parent POM](https://github.com/jenkinsci/plugin-pom),
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[Plugin Compatibility Tester](https://github.com/jenkinsci/plugin-compat-tester),
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[Jenkins Bill of Materials](https://github.com/jenkinsci/bom), and others),
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and to improve the developer experience for those who develop Jenkins plugins with Gradle.
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Contributors are welcome to choose the deliverables, based on their interest and the desired project size.
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Contributors are welcome to choose the deliverables based on their interest and the desired project size.
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Potential deliverables include but not limited to:
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Potential deliverables include but are not limited to:
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* Refreshing the Gradle JPI plugin and making it compliant with hosting best practices
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* Migrating the Gradle JPI plugin codebase from Groovy to Kotlin
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* Implementing a new convention plugin for Jenkins Plugins that would cover the main features of Jenkins plugin Parent POM, with Kotlin and Kotlin DSL.
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This would include not just building the plugin, but also testing and static analysis according to Jenkins' best practices
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* Adopting the refreshed plugin and/or the convention plugin in the most popular Gradle plugin, including the Gradle Plugin itself
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* Integrating Gradle Plugins into Plugin Compatibility Tester and Bill of Materials
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* Adopting the refreshed plugin and/or the convention plugin in the most popular Gradle plugin, including the Gradle plugin itself
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* Integrating the Gradle plugin into the Plugin Compatibility Tester and Bill of Materials
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* Documenting the updated Gradle development flow for Jenkins plugins
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**Expected outcomes**
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Updated Gradle JPI Plugin AND/OR new convention plugin for Jenkins, published on Jenkins Update Center and Gradle Plugin Portal
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Updated Gradle JPI plugin and/or new convention plugin for Jenkins, published on Jenkins Update Center and the Gradle Plugin Portal
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**Skills required (preferred)**
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**Preferred skills**
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* Kotlin DSL
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**Possible mentor**
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**Possible mentors**
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Oleg Nenashev, Stefan Wolf
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Many projects, including Gradle, have a lot of Kotlin DSL samples and code snippets (see the Gradle Docs for examples).
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Testing them against multiple versions poses certain challenges because the snippets often represent incomplete code
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for the sake of brevity. We would like to build a test framework that simplifies the verification of those samples
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within a unit test framework (Kotest or JUnit 5) on GitHub Actions or Teamcity. Later we would be interested in
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within a unit test framework (Kotest or JUnit 5) on GitHub Actions or TeamCity. Later we would be interested in
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doing the same for [Declarative Gradle](https://declarative.gradle.org/) samples.
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**Expected outcomes**
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Implementing extensibility features in the Kotlin DSL for Gradle and improving support for common project integrations
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**Preferred skills**
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**Possible mentor**
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**Possible mentors**
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**Expected outcomes**
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* Introduce Gradle Reporting to provide detailed, configurable verification task reports.
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* Utilize Gradle Worker API to enable parallel execution of the verifyPlugin task against multiple IntelliJ Platform versions, reducing the task execution time.
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* Utilize Gradle Worker API to enable parallel execution of the `verifyPlugin` task against multiple IntelliJ Platform versions, reducing the task execution time.
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* Explore additional Gradle enhancements to further improve plugin development workflows.
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**Skills required (preferred)**
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**Preferred skills**
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**Possible mentor**
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**Possible mentors**
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Jakub Chrzanowski, JetBrains
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While OpenRewrite has strong support for Java, the Kotlin ecosystem would benefit from a more comprehensive
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set of OpenRewrite recipes to help developers seamlessly migrate their codebases.
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This project aims to expand the Kotlin OpenRewrite recipe collection by adding more
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automated transformations, such as migrating Java-based AutoValue classes to idiomatic
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Kotlin data classes, modernizing Kotlin code to follow best practices, and enabling more
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seamless migrations across Kotlin versions. These recipes will help Kotlin developers
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maintain clean, up-to-date, and idiomatic codebases with minimal manual effort.
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* Development of new OpenRewrite recipes for Kotlin code migrations
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**Preferred skills**
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* Kotlin
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* Java-to-Kotlin migration strategies
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**Possible mentor**
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**Possible mentors**
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* Improved dependency resolution and usability for Bazel users
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* Documentation and examples for using BOM support in Bazel
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**Skills required (preferred)**
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**Preferred skills**
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* Starlark (Bazel's scripting language)
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**Possible mentor**
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**Possible mentors**
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Gradle recently introduced a new [Problems API](https://docs.gradle.org/current/userguide/reporting_problems.html)
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that allows Gradle and third-party plugins to propagate issues and warnings in a unified way.
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This API provides clean and actionable error reporting and more insights into the console output, dedicated HTML reports,
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and connected observability tools. IDEs, such as IntelliJ IDEA or Android Studio, also have access to the details via Gradle's tool integration API,
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and can show warnings right in the code editorI. Several core features and plugins have already adopted the Problems API: Java compilation,
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dependency resolution errors, deprecation warnings, etc. We want the code quality plugins for Kotlin to adopt this API, too; it would greatly
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and connected observability tools. IDEs such as IntelliJ IDEA or Android Studio can also access the details via Gradle's API integration tool,
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and can show warnings right in the code editor. Several core features and plugins have already adopted the Problems API: Java compilation,
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dependency resolution errors, deprecation warnings, etc. We want the code quality plugins for Kotlin to adopt this API, too; it would significantly
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improve the developer experience for 100,000+ Kotlin developers using Gradle.
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In this project, we invite contributors to choose a number of Kotlin code quality plugins, such as Ktlint, Detekt, Diktat, ArchUnit, or Checkstyle
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**Preferred skills**
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* Kotlin
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* Gradle

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