Re: [gentoo-soc] Weekly Report: Big Data Infrastructure and Maven Overlay in Week 6

[Zhang Zongyu]

>
> On 12/07/2020 16:42, Zhang Zongyu wrote:
> > The reason why I have to install binaries varies. Here are the main reasons:
> > 1. Maven central only distributes binary jars (even those jars are
> > named with a "sources" suffix). I will fix the problem by changing the
> > SRC_URI of a proper source code file next week.
>
> Could you show me a sources jar that doesn't contain sources? Just
> curious, I've never ran into any.

I am so sorry that it was a huge mistake. :(
I forgot to clear the old jars of in my ${DISTDIR}, and filenames of
some pre-built jars and source-code-jars happened to be the same.
I recognized it as *-sources.jars with pre-built class files. I am really
sorry for the misleading, and I will fix the problem this week.

> In principle, a Maven repository can contain any files, so it's
> possible, but in general, if a project uses Maven sources plugin, the
> jar should contain sources just right. Those sources however aren't
> intended to be compiled on their own, they serve as documentation or are
> used for IDE autocomplete.
>
> You'd need to checkout the project's repository (including the build
> tools) to be able to build the project in general.

Thanks for the advice. I am going to do so.

> > 2. The source code files are not written in Java. Some Jars contain
> > Ruby, Scala, Kotlin, or Lombok codes. [3] Maybe we should discuss how
> > to emerge those packages next week.
>
> Just a note, Lombok isn't a language, but Java compiler plugin that
> generates bytecode from annotations at compile time.
>
> Scala and Kotlin are a common sight, as they compile into the same
> bytecode that JVM can run.
>

It seems they can all work with Java, so I am not surprised that they
appear in Maven Central.
I will learn about those languages and may have to extend
java-pkg-simple to compile them in the next few weeks.

Regards,
Zhang Zongyu