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Jacob Wujciak-Jens authored and GitHub committed 2a4e0db7dd2
GH-27839: [R] Fetch latest nightly binary for arrow R dev versions. (#38236) ### Rationale for this change We currently need to manually download the latest nightly build as the ".9000' dev version never matches any nightly builds. ### What changes are included in this PR? Check the nightly repo html listing for the latest version matching the local major version. Refactor nixlibs.R and integrate the functionality of winlibs.R into it to simplify maintenance and prepare for the future of in-line windows libarrow builds. These changes are build on #38195 so once that is merged I will rebase this. ### Are these changes tested? Crossbow * Closes: #27839 Lead-authored-by: Jacob Wujciak-Jens <jacob@wujciak.de> Co-authored-by: Dewey Dunnington <dewey@dunnington.ca> Signed-off-by: Jacob Wujciak-Jens <jacob@wujciak.de>