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https://issues.apache.org/jira/browse/COMPRESS-634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17680210#comment-17680210
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Gary D. Gregory commented on COMPRESS-634:
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[~bmarcaur]
I am guessing there is more to do than update test fixtures. Probably adding
support so that when the module info is read, it can be written out again.
Feel free to create a PR on GitHub. This is likely to be not trivial.
> Pack200 Fails to Pack Jars with Module Declarations
> ---------------------------------------------------
>
> Key: COMPRESS-634
> URL: https://issues.apache.org/jira/browse/COMPRESS-634
> Project: Commons Compress
> Issue Type: Bug
> Components: Compressors
> Affects Versions: 1.21
> Reporter: Brandon Marc-Aurele
> Priority: Major
>
> Using commons-compress version 1.21+ (move to native pack algorithm) fails to
> pack jars with module declarations. It fails with the following
> error/stacktrace:
> {code:java}
> java.lang.UnsupportedOperationException: Module requires ASM6
> at org.objectweb.asm.ClassVisitor.visitModule(ClassVisitor.java:153)
> at
> org.objectweb.asm.ClassReader.readModuleAttributes(ClassReader.java:781)
> at org.objectweb.asm.ClassReader.accept(ClassReader.java:580)
> at
> org.apache.commons.compress.harmony.pack200.Segment.processClasses(Segment.java:160)
> at
> org.apache.commons.compress.harmony.pack200.Segment.pack(Segment.java:110)
> at
> org.apache.commons.compress.harmony.pack200.Archive.doNormalPack(Archive.java:128)
> at
> org.apache.commons.compress.harmony.pack200.Archive.pack(Archive.java:98)
> {code}
> [Here|https://github.com/bmarcaur/commons-compress/commit/ff9af724d668c67b2746775711cdaed123bd42bb]
> is a minimal repro commit. I used the {{HelloWorld.java}} and added an empty
> module like:
> {code:java}
> module reproModule {} {code}
> These are the contents of {{{}hw-module.jar{}}}.
> I ran in to this issue trying to move a large internal repo from 1.20 to 1.22
> following our back and forth on COMPRESS-582.
> Just as a matter of exploration I also attempted to change the ASM level
> [within
> commons-compress|https://github.com/bmarcaur/commons-compress/commit/f782c0160e10e67d6c294f69a57e06c549c8c0ef],
> but doing so caused a number of tests to fail locally due to the jars not
> being identical after a packing round trip. I am not sure the SOP for
> updating the comparison Jars or if this is indicative of an issue with the
> change.
> To prove that increasing the ASM level allows us to pack jars with modules [I
> extended our previous repro with a new test exemplifying a _very_ hacky
> "fix".|https://github.com/AlexLandau/commons-compress-asm-error/blob/develop/src/test/java/com/github/alexlandau/commonscompressrepro/ReprosTest.java#L29]
> Let me know if there is any other context I can provide. Thank you!
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