Add module-info.java #1486
Add module-info.java #1486
Conversation
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The fixupmessage is necessary as okio is not yet #1363 on bnd 7.0.0 bndtools/bnd#2227. EDIT: Fixed in #1487 |
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We should be able to simplify the build once base-line increases to java > 8. We'd be able to remove the multi-release jar, and just use multiplatform's java source folder directly. We wouldn't need the META-INF/versions directory, nor the |
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I was able to simplify module compilation via the docs here https://kotlinlang.org/docs/gradle-configure-project.html#configure-with-java-modules-jpms-enabled. |
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Unfortunately I suspect it will be a long while before we drop Java 8 support completely. |
That's fine if you're alright with the mild additional complexity that an mr-jar brings along with it. |
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It's probably worth it, yeah. I'll talk to Jesse about it soon and see if he has any concerns. I have a similar setup (with some different complexities) in Retrofit. I should add a module descriptor there, too, although I have about 20 modules to add it to there... |
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It might be possible to remove the dependency on java.logging too, if on versions > 8 we use System.Logger instead. Afaik it's only used for one utility class, and even then only for warning. |
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Yes, that would be great, too! |
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The logger classes have been added. I converted them to kotlin and made them internal to not trigger the api validator. Speaking of, I don't think the api-validator currently checks that the api is identical between two classes in an mr-jar. |
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Yeah I saw your issue on BCV. Thanks for thinking of it. I'm not sure whether it's BCV's problem or not. From what I remember MR jars only replace classes at runtime and have no effect on compile-time. So even if you were to expose new API in one, it cannot be linked against in code (except through reflection at runtime). |
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Code should be ready for review. |
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There's an issue where the new Logger class isn't being included in the jar. |
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Ok so if you don't exclude the META-INF folder that the java9 kotlin compile task generated, you'll get strange errors on java 11 |
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Is there anything else I've missed and should add? Any further simplifications to the build process? |
Adds a new java compile task (depends on jvm dependencies and kotlin class files) to compile a module-info.java file, and puts it into the jvm jar.
I've never done this for a kotlin-multiplatform project, so I'm sure there are improvements. I looked into using multi-platforms 'withJvm' feature, but that dropped the files that were compiled with java 8 directly into the resulting jar. At least with this custom sourceset approach, we can compile the file with java 9 and put the module-info.class file where we want (META-INF/versions/9).