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http://jira.codehaus.org/browse/MNG-5039?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benjamin Bentmann closed MNG-5039.
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Resolution: Duplicate
Assignee: Benjamin Bentmann
> Maven does not properly track class files to be included in jar/test breaking
> incremental build
> -----------------------------------------------------------------------------------------------
>
> Key: MNG-5039
> URL: http://jira.codehaus.org/browse/MNG-5039
> Project: Maven 2 & 3
> Issue Type: Bug
> Components: Plugins and Lifecycle
> Affects Versions: 2.2.1, 3.0
> Reporter: Emil Sit
> Assignee: Benjamin Bentmann
> Priority: Critical
>
> When files in the source tree (either src/main or src/test) are renamed or
> removed, the class files resulting from their prior compilation remain in the
> corresponding target/ directories. It seems that surefire and package
> plugins simply grab everything from target/ and as a result, incremental
> builds are not correct. For example,
> * If you remove a test source file and the test will continue to run. This is
> bad esp when the test is failing; packaging will fail even though it should
> not.
> * If you remove/rename a source file and the class file will continue to be
> in the jar. This may cause tests to succeed even though they should not.
> (And if you share the jar, this will affect downstream non-test dependencies.)
> I wrote up a test suite for the second case and put it up at
> https://github.com/sit/java-build-test. To run it ...
> git clone git://github.com/sit/java-build-test.git
> cd java-build-test
> sh runme.sh
> (It does rely on git to automate the rename/delete actions though so a tar of
> the sources won't work.)
> In addition to Maven, it tests Gradle (which works) and Buildr (which behaves
> the same as Maven).
> While incremental builds are not the recommendation for official
> deliverables, this does make Maven appear extremely unreliable to developers
> who never know after syncing whether they will have to do a clean build or if
> an incremental one is correct.
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