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https://issues.apache.org/jira/browse/ARROW-8880?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17113573#comment-17113573
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Neal Richardson commented on ARROW-8880:
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C++ binaries for 0.17.1 now exist in the right place. Thanks again for the
heads up about that.
> [R][Linux] Make R Binary Install Friendlier
> -------------------------------------------
>
> Key: ARROW-8880
> URL: https://issues.apache.org/jira/browse/ARROW-8880
> Project: Apache Arrow
> Issue Type: Improvement
> Components: R
> Affects Versions: 0.17.1
> Environment: Linux (Ubuntu)
> Reporter: Brian Schultheiss
> Priority: Minor
>
> When R install tries to run a binary install, it looks for an exact match on
> the binary version, say "0.17.1.zip" from
> [https://dl.bintray.com/ursalabs/arrow-r/libarrow/bin/ubuntu-18.04/].
> The problem is that even though "0.17.1" is pushed to CRAN as an official
> release, there is a time period (like right now) where bintray does not have
> an official binary build, just a date stamped build:
>
> arrow-0.17.0.20200516.zip
> arrow-0.17.0.20200517.zip
> arrow-0.17.0.20200518.zip
> arrow-0.17.0.zip
> arrow-0.17.1.20200517.zip
> arrow-0.17.1.20200519.zip
> arrow-0.17.1.20200520.zip
>
> I'd like to suggest adding a new environment variable trigger that would
> allow for the scanning of bintray for a recent timestamped version, if the
> specific release number is not present.
> I'd like to suggest enhancing the linux code:
> [https://github.com/apache/arrow/blob/02f7be33d1c32d1636323e6fb90c63cb01bf44af/r/tools/linuxlibs.R#L39-L47]
> with scanning functionality:
> {color:#c1c7d0}try_download <- function(from_url, to_file, scan_dates =
> FALSE) {{color}
> {color:#c1c7d0} try({color}
> {color:#c1c7d0} suppressWarnings({color}
> {color:#c1c7d0} download.file(from_url, to_file, quiet =
> quietly){color}
> {color:#c1c7d0} ),{color}
> {color:#c1c7d0} silent = quietly{color}
> {color:#c1c7d0} ){color}
> {color:#0747a6}{color:#c1c7d0} if (!file.exists(to_file))
> {{color}{color}
> {color:#0747a6} {color:#c1c7d0} {color}{color:#c1c7d0} if
> (scan_dates) {{color}{color}
> {color:#0747a6} {color:#0747a6} scan_dates <-
> format(Sys.Date()-(0:10),"%Y%m%d"){color}{color}
> {color:#0747a6} {color:#0747a6} for (scan_date in
> scan_dates) {{color}{color}
> {color:#0747a6} {color:#0747a6} base_url <-
> tools::file_path_sans_ext(from_url){color}{color}
> {color:#0747a6} {color:#0747a6} ext <-
> tools::file_ext(from_url){color}{color}
> {color:#0747a6} {color:#0747a6} scan_url <-
> sprintf("%s.%s.%s", base_url, scan_date, ext){color}{color}
> {color:#0747a6} {color:#0747a6} if
> (try_download(from_url = scan_url, to_file, scan_dates = FALSE))
> {{color}{color}
> {color:#0747a6} {color:#0747a6}
> return(TRUE){color}{color}
> {color:#0747a6} {color:#0747a6} }{color}{color}
> {color:#0747a6} {color:#0747a6} }{color}{color}
> {color:#0747a6} {color:#0747a6} }{color}{color}
> {color:#0747a6} {color:#0747a6} return(FALSE){color}{color}
> {color:#0747a6}{color:#c1c7d0} } else {{color}{color}
> {color:#0747a6} {color:#c1c7d0} return(TRUE){color}{color}
> {color:#0747a6} {color:#c1c7d0} }{color}{color}
> }
> And then augment the calling function:
> [https://github.com/apache/arrow/blob/02f7be33d1c32d1636323e6fb90c63cb01bf44af/r/tools/linuxlibs.R#L55]
>
> with:
> binary_scan_ok <- !identical(tolower(Sys.getenv("LIBARROW_BINARY_SCAN",
> "false")), "false")
> {color:#c1c7d0}if (try_download(binary_url, libfile, {color}scan_dates =
> binary_scan_ok{color:#c1c7d0})) {{color}
>
> This would allow automated builds to set the scan option, and then find and
> install the most recent daily build in lieu of an official binary build being
> in place.
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