>>>>> Kurt Wheeler writes: Try e.g.
https://cran.r-project.org/package=httr&version=1.3.1 https://cran.r-project.org/package=httr&version=1.3.0 -k > Hello, I hope the is the right list to send this suggestion to. > I was wondering if it might be possible to have CRAN store the most current > version of a package's source tarball at a location that does not change. > As an example, the source tarball for `httr` is stored at > https://cran.r-project.org/src/contrib/httr_1.3.1.tar.gz. However, once the > next version of `httr` is released, the URL for version 1.3.1 of `httr` > will change to > https://cran.r-project.org/src/contrib/Archive/httr_1.3.1.tar.gz. > The implications of this are that if I want to write a script which > installs version 1.3.1 of `httr`, I need to do so like this: > ``` > httr_url <- "https://cran.r-project.org/src/contrib/httr_1.3.1.tar.gz" > curl_result <- system(paste0("curl --head ", httr_url), intern=TRUE) > if (grepl("404", curl_result[1])) { > httr_url <- " > https://cran.r-project.org/src/contrib/Archive/httr_1.3.1.tar.gz" > } > install.packages(httr_url) > ``` > I think there are two obvious ways of remedying this issue. The first would > be to simply archive the most recent version along with all the old > versions. Then to install a specific version of a package, it would just be: > ``` > install.packages(" > https://cran.r-project.org/src/contrib/Archive/httr_1.3.1.tar.gz") > ``` > even if 1.3.1 is the most recent version of `httr`. > The other way to remedy this issue would be to simply not use the > `/Archive/` sub-directory. So if I wanted to install an old version of > `httr` it would be: > ``` > install.packages("https://cran.r-project.org/src/contrib/httr_1.3.0.tar.gz") > ``` > despite the fact that version 1.3.0 is not the most recent version. > I believe the first way would be a better choice because then any existing > scripts which reference URLs which include `/Archive/` would still work. > However I do not have strong opinions on how this should be implemented, I > would just like a URL which points to a certain version of a package that > will never change. > Thank you, > - Kurt > [[alternative HTML version deleted]] > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel