You're right, java package don't retain references to there input, that's why we propagate required dependencies (mh… sometimes). I don't know how they could reference dependencies directly.

Le 17 octobre 2022 23:04:47 GMT+02:00, Maxim Cournoyer <maxim.cournoyer@gmail.com> a écrit :
>Hello,
>
>I'm not a Java expert, but this appears to me problematic:
>
>--8<---------------cut here---------------start------------->8---
>$ guix build java-commons-dbcp
>/gnu/store/jghsa6fmh9vjcsmj7wwilk3w6iblvh32-java-commons-dbcp-2.6.0
>
>$ guix gc -R /gnu/store/jghsa6fmh9vjcsmj7wwilk3w6iblvh32-java-commons-dbcp-2.6.0
>/gnu/store/jghsa6fmh9vjcsmj7wwilk3w6iblvh32-java-commons-dbcp-2.6.0
>--8<---------------cut here---------------end--------------->8---
>
>Digging a bit more, peeking into the .jar file, which is a ZIP archive:
>
>--8<---------------cut here---------------start------------->8---
>$ unzip /gnu/store/jghsa6fmh9vjcsmj7wwilk3w6iblvh32-java-commons-dbcp-2.6.0/\
>share/java/java-commons-dbcp.jar -d /tmp/java-commons-dbcp.jar
>
>$ grep -rin CLASSPATH /tmp/java-commons-dbcp.jar
>$ grep -rin /gnu/store /tmp/java-commons-dbcp.jar
>/tmp/java-commons-dbcp.jar/META-INF/INDEX.LIST:3:/gnu/store/jghsa6fmh9vjcsmj7wwilk3w6iblvh32-java-commons-dbcp-2.6.0/share/java/java-commons-dbcp.jar
>
>$ cat /tmp/java-commons-dbcp.jar/META-INF/INDEX.LIST
>JarIndex-Version: 1.0
>
>/gnu/store/jghsa6fmh9vjcsmj7wwilk3w6iblvh32-java-commons-dbcp-2.6.0/share/java/java-commons-dbcp.jar
>org
>org/apache
>org/apache/commons
>org/apache/commons/dbcp2
>org/apache/commons/dbcp2/cpdsadapter
>org/apache/commons/dbcp2/datasources
>org/apache/commons/dbcp2/managed
>--8<---------------cut here---------------end--------------->8---
>
>Still, no traces of the other libraries such as 'java-commons-pool'
>which should be referenced.
>
>I assume this means grafts doesn't currently work for Java libraries.
>
>-- 
>Thanks,
>Maxim
>
>
>