[bug#32295] [PATCH] gnu: clojure: Fix index generation

["Gábor Boskovits" <boskovits@gmail.com>]

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Alex ter Weele <alex.ter.weele@gmail.com> ezt írta (időpont: 2018. júl.
29., V, 5:05):

> Gábor Boskovits <boskovits@gmail.com> writes:
>
> > I could use some help from someone more familiar with clojure uses.
> >
> > On current master clojure does not build, as the manifest contains
> > Class-Path: .
> > and jar -i throws exception in phase 'generate-jar-indices.
> >
> > The patch I proposed removes the classpath from the manifest. Do you
> > think this can interfere with normal uses of clojure?
> >
>
> Gábor,
>
> I applied your patch and did the following:
>
> $ guix environment guix -- make -j4 && ./pre-inst-env guix environment
> --ad-hoc icedtea clojure
> ...
> $ java -jar $GUIX_ENVIRONMENT/share/java/clojure-1.9.0.jar
> Clojure 1.9.0
> user=> (inc 0)
> 1
> user=> (clojure.set/difference #{1 2} #{1})
> ClassNotFoundException clojure.set  java.net.URLClassLoader.findClass
> (URLClassLoader.java:381)
> user=> (require 'clojure.set)
> nil
> user=> (clojure.set/difference #{1 2} #{1})
> #{2}
>
> Constructing the environment caused Clojures's test suite to run with no
> failures. Based on a cursory test, I think that Clojure is working as
> expected.
>
>
Thanks for the review, I will apply this patch then.


> I also looked into what the removed line
> means. https://ant.apache.org/manual/Tasks/jar.html explains that
> <manifest> in the "jar" task specifies an inline
> manifest.
> https://docs.oracle.com/javase/8/docs/technotes/guides/jar/jar.html#classpath
> explains the meaning of a Class-Path in a manifest. So, I believe that
> means that at runtime, JARs in the same directory as the Clojure JAR
> will be available on the classpath.
>
> I believe that the <attribute name="Class-Path" value="."/> line was
> added in this commit
>
> https://github.com/clojure/clojure/commit/36868a7734f15c51eb1831aa9d72a14544496987#diff-2cccd7bf48b7a9cc113ff564acd802a8R30.
> The
> age of the commit and the commit message lead me to believe that it was
> added as a convenience during the early development of Clojure and may
> be removable upstream now. I may ask about that on the Clojure mailing
> list.
>
> > Another possible solution would be to delete the index generation
> > phase, but I'm not sure about the implications here either.
> >
> > WDYT?
>
> I also tried this and did the same as above. Clojure's test suite ran
> again and had no failures. However, generate-jar-indices in (guix build
> ant-build-system) has a docstring which suggests that the phase is
> necessary to prevent garbage collection of the dependencies of the JAR
> file. So it would seem like your patch is the best way to go ☺
>
> P.S.: Gábor, thanks for your work on Java packages recently! With a
> maven-build-system, I think I can bootstrap leiningen, which I'd really
> like to see in the distribution.
>
>

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