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https://issues.apache.org/jira/browse/YETUS-488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16022598#comment-16022598
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Peter Vary edited comment on YETUS-488 at 5/24/17 9:24 AM:
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Thanks for the review and the commit [~aw]!
was (Author: pvary):
Thanks for the review and the commit [aw]!
> Checkstyle reports new error if the file still longer than expected
> -------------------------------------------------------------------
>
> Key: YETUS-488
> URL: https://issues.apache.org/jira/browse/YETUS-488
> Project: Yetus
> Issue Type: Improvement
> Components: Test Patch
> Affects Versions: 0.4.0
> Reporter: Peter Vary
> Assignee: Peter Vary
> Priority: Minor
> Fix For: 0.5.0
>
> Attachments: branch-checkstyle-hadoop-tools.txt,
> diff-checkstyle-hadoop-tools.txt, patch-checkstyle-hadoop-tools.txt,
> YETUS-488.00.patch, YETUS-488.01.patch, YETUS-488.02.patch
>
>
> Given a java source file which is originally longer than the checkstyle
> defined value then we get the following warning every time the length changes
> and we run the checkstyle plugin:
> {code}
> ./beeline/src/java/org/apache/hive/beeline/BeeLine.java:1: warning: File
> length is 2,373 lines (max allowed is 2,000).
> {code}
> The problem is, that the checkstyle output is changed:
> {code:title=From}
> ./beeline/src/java/org/apache/hive/beeline/BeeLine.java:1: warning: File
> length is 2,373 lines (max allowed is 2,000).
> {code}
> {code:title=To}
> ./beeline/src/java/org/apache/hive/beeline/BeeLine.java:1: warning: File
> length is 2,365 lines (max allowed is 2,000).
> {code}
> Since the {{checkstyle_calcdiffs}} does not find the new line in the original
> output, it marks it as a new error, and gives -1 to the result of the
> checkstyle plugin.
> This is true for every error message where there is a number in the text. Not
> exhaustive examples are below:
> - Line length
> - Row length
> - Function length
> - Number of attributes
> - Indentation
> I think we should be reluctant to give -1 without a reason so it would be
> good to remove these errors.
> I have yet to find the ideal solution for the issue:
> - An easy patch could be to remove the numbers from files before the diff
> (note: it does not effect the final diff-checkstyle-<MODULE>.txt output
> messages). This would mean that the warning will give -1 only the first time
> when the error text is occurred, and will not give -1 if the numbers are
> changed, like
> -- File become shorter, but still longer than expected
> -- File become even longer
> -- Indentation changed but still problematic
> - A more sophisticated patch could do this only for specific errors, or even
> check the value and give error when the line length grow.
> To be honest, I think the second solution would complicate the code too much,
> and make it dependent on the specific checkstyle messages, so I do not like
> it.
> I am even hesitant about the first one, because the change I introducing with
> it might have unwanted consequences.
> Do anyone has better ideas? I would be happy to implement them, if someone
> points me to the right direction :D
> Thanks,
> Peter
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