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https://issues.apache.org/jira/browse/LUCENE-4016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13262130#comment-13262130
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Dawid Weiss commented on LUCENE-4016:
-------------------------------------
Jenkins is running ant 1.8.2. Everything seems to work identically to ant 1.7.
I've attached a patch that enforces ant 1.8.2 or later so if you have an older
ant, the build will fail for you with a message saying you need to upgrade.
Explanation -- ant 1.8.2 is available by default on macs and 1.8.3 is
relatively new so I decided to make 1.8.2 a required version. Everything works
fine with 1.8.3 as well so you can use the latest one too.
If there are no objections, I'll commit it shortly.
> Check if all the packaging/ development tasks work with latest Ant 1.8.x and
> switch to ant 1.8.x as the "officially supported" build platform.
> ----------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-4016
> URL: https://issues.apache.org/jira/browse/LUCENE-4016
> Project: Lucene - Java
> Issue Type: Task
> Components: general/build
> Reporter: Dawid Weiss
> Assignee: Dawid Weiss
> Priority: Trivial
> Fix For: 4.0
>
> Attachments: LUCENE-4016.patch
>
>
> Diff the outputs between ant 1.8.2 and ant 1.7.1.
> {noformat}
> Target Windows Ubuntu Mac Jenkins
> ------------------------------------------------
> /
> ivy-bootstrap OK OK OK ?
> jar-checksums OK OK OK ?
> validate OK OK OK ?
> test OK OK OK OK
> lucene/
> prepare-relea* OK OK OK ?
> solr/
> prepare-relea* OK OK OK ?
> {noformat}
> Check consistency with release instructions:
> http://wiki.apache.org/lucene-java/ReleaseTodo and
> http://wiki.apache.org/solr/HowToRelease
> Differences log:
> - ant 1.8.x creates empty package-info.class where ant 1.7.x would fail to do
> so. This is documented at http://ant.apache.org/manual/Tasks/javac.html and
> is the expected behavior.
> - manifest timestamps are slightly different (Created-By - jvm version is
> formatted differently, I think more human-friendly in 1.8).
> {noformat}
> 1.7: Created-By: 22.1-b02 (Oracle Corporation)
> 1.8: Created-By: 1.7.0_03-b05 (Oracle Corporation)
> {noformat}
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