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https://issues.apache.org/jira/browse/LUCENE-3961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13247778#comment-13247778
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Hoss Man commented on LUCENE-3961:
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I don't have a strong opinion about this, but there are two counter arguments
i've heard from over the years made in favor of *always* building the jar(s)
even though it's a bit slower for the tests...
1) it mean you always test against hte same jars that you ship -- so there is
no risk that the classpath you build for testing is subtly different then the
files that make it into the jar (ie: maybe contrib/cheeseburger/build.xml
copies a cheese_types.xml file into it's classes dir, but it accidentally gets
excluded from contrib-cheeses.jar
2) it means less risk that someone accidentally uses an older jar then they
thing...
a) "ant something" ... builds contrib-hamburger.jar and contrib-cheese.jar
b) you realize it doesn't work the way you want, so you apply a patch (with
tests!)
c) "ant test" rebuilds contrib/*/classes and you see your new hamburger test
passes
d) you copy contrib-hamburger.jar and contrib-cheese.jar not realizing they are
still left over from #a above, and don't have your patch.
> don't build and rebuild jar files for dependencies in tests
> -----------------------------------------------------------
>
> Key: LUCENE-3961
> URL: https://issues.apache.org/jira/browse/LUCENE-3961
> Project: Lucene - Java
> Issue Type: Improvement
> Components: general/build
> Reporter: Robert Muir
> Fix For: 4.0
>
>
> Hossman's comments about when jars are built had me thinking,
> its not really great how dependencies are managed currently.
> say i have contrib/hamburger that depends on contrib/cheese
> if I do 'ant test' in contrib/hamburger, you end out with a situation
> where you have no hamburger.jar but you have a cheese.jar.
> The reason for this: i think is how we implement the contrib-uptodate,
> via .jar files. I think instead contrib-uptodate shouldnt use actual
> jar files (cheese.jar) but a simple file we 'touch' like cheese.compiled.
> This will make the build faster, especially I think the solr tests
> which uses these dependencies across a lot of lucene modules. we won't
> constantly jar their stuff.
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