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Fix fingerprint with deps #1074

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merged 4 commits into from
Jan 10, 2022
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@tisoft tisoft commented Jan 7, 2022

Newer Maven versions (at least 3.6.3 is affected) use a org.apache.maven.model.merge.ModelMerger$MergingList, if a plugin is defined inside pluginManagement and additionally defines custom dependencies. This class is not serializable, which will fail the PluginFingerprint.

This change replaces the dependency list with an ArrayList before serialization and sets it back to the original list afterwards.

You can try the demonstrator test without the fix commit, to validate the error.

Fixes: #1073

@tisoft tisoft force-pushed the fix_fingerprint_with_deps branch from c2df929 to a1de999 Compare January 7, 2022 10:50
@nedtwigg nedtwigg requested a review from lutovich January 7, 2022 18:22
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lutovich commented Jan 8, 2022

Thanks for this fix! I will review it today or tomorrow. Tbh, this error is unexpected because org.apache.maven.model.Plugin implements Serializable. Perhaps this is a bug in the newer Maven version?

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Looks good, I added two comments. Thanks for discovering and fixing this problem!

I also created a Jira for Maven https://issues.apache.org/jira/browse/MNG-7386.

@lutovich lutovich merged commit eba1c59 into diffplug:main Jan 10, 2022
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Published in 2.19.2.

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java.io.NotSerializableException with upToDateChecking enabled
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