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https://issues.apache.org/jira/browse/LUCENE-4335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14238655#comment-14238655
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Robert Muir commented on LUCENE-4335:
-------------------------------------
There are a ton of reasons why:
* actually working with a modern IDE is important.
* some are very slow, for example kuromoji compacts a segmentation model into
data files.
* others require tools like icu4c, python, mercurial, all kinds of stuff which
must be installed on the machine.
Its not feasible, and losing portability is not an option.
> Builds should regenerate all generated sources
> ----------------------------------------------
>
> Key: LUCENE-4335
> URL: https://issues.apache.org/jira/browse/LUCENE-4335
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Attachments: LUCENE-4335.patch, LUCENE-4335.patch, LUCENE-4335.patch
>
>
> We have more and more sources that are generated programmatically (query
> parsers, fuzzy levN tables from Moman, packed ints specialized decoders,
> etc.), and it's dangerous because developers may directly edit the generated
> sources and forget to edit the meta-source. It's happened to me several
> times ... most recently just after landing the BlockPostingsFormat branch.
> I think we should re-gen all of these in our builds and fail the build if
> this creates a difference. I know some generators (eg JavaCC) embed
> timestamps and so always create mods ... we can leave them out of this for
> starters (or maybe post-process the sources to remove the timestamps) ...
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