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https://issues.apache.org/jira/browse/COMPRESS-660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17818517#comment-17818517
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Christoph Loy commented on COMPRESS-660:
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Thanks for the quick response!
The change you suggest would unfortunately not fix the issue. What I need is
that every package import that comes from org.apache.commons.codec also has a
resolution:=optional attribute. So in your concrete example, I need to replace
this:
{code:java}
org.apache.commons.codec,org.apache.commons.codec.digest{code}
with this:
{code:java}
org.apache.commons.codec;resolution:=optional,org.apache.commons.codec.digest;resolution:=optional{code}
I almost have a PR ready for this change, I guess I'll be able to submit it by
tomorrow.
Regarding the "org.apache.commons.commons-codec;resolution:=optional" line: I
don't really understand what it means and what it references, since such a
package doesnt exist as far as I know. It doesn't hurt us though, since it's
optional anyways and I don't understand the implications of removing it. So if
it was my decision, I'd just leave it in there.
> OSGi Manifest requires optional dependency commons-codec
> --------------------------------------------------------
>
> Key: COMPRESS-660
> URL: https://issues.apache.org/jira/browse/COMPRESS-660
> Project: Commons Compress
> Issue Type: Bug
> Components: Build
> Affects Versions: 1.26.0
> Reporter: Christoph Loy
> Priority: Major
>
> Since version 1.26, commons-compress *optionally* [requires
> commons-codec|https://github.com/apache/commons-compress/blob/09a271dfd73e3ce01815f3f65057f92b5b7009bb/pom.xml#L134].
> In the OSGi-Manifest, the Import-Package declaration for
> org.apache.commons.codec does not have the resolution:=optional attribute.
>
> In our case, we have commons-compress as maven dependency. Since
> commons-codec is an optional dependency, it is not downloaded automatically.
> But when we start our application, we get an OSGi error that commons-codec
> cannot be resolved.
>
>
> To fix this issue, the Import-Package delcaration to all
> apache.commons.compress packages has to be marked with resolution:=optional
> in META-INF/MANIFEST.MF.
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