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Use Kotlin's documented Maven setup to compile Kotlin before Java

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评估

难度
4/5
预计耗时
3-5 天
新手友好度
48/100
Issue 类型
重构
描述清晰度
基本清楚
活跃度
活跃
技术栈
java, kotlin
领域
build-system

调研方向

Read the Maven configuration for kotlin-maven-plugin and maven-compiler-plugin, including default-testCompile and the java17-tests profile. Compare it with the Kotlin Maven guide's second setup option, then check how module-info.java and the release profile's source and javadoc jars depend on the current executions. Done means Kotlin and Java compile in the required order across these configurations with no behavior change.

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描述

We get Kotlin compiled before javac by binding the Kotlin executions to earlier phases: compile runs at process-sources, and since #879 test-compile runs at process-test-sources. #879 needed that so ResolverMethodsTest.java could call the Kotlin assertEveryFieldResolves helper. Without it, javac compiled the Java tests before any Kotlin test class existed.

It works, but it isn't how Kotlin's docs say to do it. The Maven guide has two options:

  • <extensions>true</extensions> on kotlin-maven-plugin, declared before maven-compiler-plugin. It adds the Kotlin executions itself, and the docs say not to configure the compiler plugin's executions with it.
  • Keep the Kotlin executions at compile / test-compile, set default-compile and default-testCompile to <phase>none</phase>, and add java-compile / java-test-compile executions after Kotlin.

The second one probably fits better, since we already configure default-testCompile (useModulePath=false, with a TODO for 15.0.0) and the java17-tests profile adds its own java17-test-compile execution. Both have to keep working, along with module-info.java and the release profile's source and javadoc jars.

No behaviour change, it's build cleanup only.

主要语言
Kotlin
星标
824
派生
175
平均合并
2 天 5 小时
30 天内合并 PR
52

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从这里开始

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  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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