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https://issues.apache.org/jira/browse/LUCENE-9767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17283988#comment-17283988
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Dawid Weiss commented on LUCENE-9767:
-------------------------------------

Would it be any different if we downloaded a binary (for a given system) in a 
specific version? For example:

https://github.com/unicode-org/icu/releases/tag/release-68-2

I downloaded the Windows version and the tools were there (and worked). I can 
try to automate this process - it won't work forever (until they change the 
download links) but it'd be easier to switch a link than compile it locally. 
Plus, it'd work on exotic environments like Windows ;) 

I haven't looked at the patch you committed yet but I can try to switch to 
binaries if this is acceptable.

> port ICU regeneration to gradle build
> -------------------------------------
>
>                 Key: LUCENE-9767
>                 URL: https://issues.apache.org/jira/browse/LUCENE-9767
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Robert Muir
>            Priority: Major
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> When we upgrade ICU dependency we have to regenerate a lot of stuff. The ant 
> build has it all automated.
> You do need icu4c installed corresponding to the icu4j version to regenerate 
> some of the datastructures. There are also some java regenerators that do 
> processing of unicode data and so on.
> Will try to see if I can get this hobbling when I have the time, the icu 
> dependency is quite old at this point. The hard part for me is learning 
> gradle's crazy ways every time, but maybe i can start it off super-ugly with 
> something like shell script that everyone hates, but at least works 
> correctly. 
> cc [~dweiss]



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