Dean Attali
2023-Jun-14 13:22 UTC
[R] Why install.packages(repos = X) does not override the 'repos' R option?
There is a default R option for which repos to install from -
`getOption("repos")`.
When installing a package using install.packages(), you can provide a
`repos` parameter. The default value of that parameter is
`getOption("repos")`. I assumed that this parameter would override the
R
option. In other words, I assumed that if the parameter is provided, then
the R option would not even be looked at. But after testing this, it seems
this is not the case.
For example, running the following two lines in an R session:
options(repos=c(CRAN="https://BADNAME.com"))
install.packages("vctrs", repos =
"https://cloud.R-project.org")
I would have expected the first line to be rendered meaningless, but in
fact after running the second line I see errors about the BADNAME
repository. This feels like a bug to me, but I'm sure there's a reason
behind this. Does anyone know why this is the case?
[[alternative HTML version deleted]]
Duncan Murdoch
2023-Jun-15 17:42 UTC
[R] Why install.packages(repos = X) does not override the 'repos' R option?
(Sorry, forgot "Reply all" last time.) That's an RStudio bug. It doesn't happen if you use install.packages() from R. Duncan Murdoch On 14/06/2023 9:22 a.m., Dean Attali wrote:> There is a default R option for which repos to install from - > `getOption("repos")`. > > When installing a package using install.packages(), you can provide a > `repos` parameter. The default value of that parameter is > `getOption("repos")`. I assumed that this parameter would override the R > option. In other words, I assumed that if the parameter is provided, then > the R option would not even be looked at. But after testing this, it seems > this is not the case. > > For example, running the following two lines in an R session: > > options(repos=c(CRAN="https://BADNAME.com")) > install.packages("vctrs", repos = "https://cloud.R-project.org") > > I would have expected the first line to be rendered meaningless, but in > fact after running the second line I see errors about the BADNAME > repository. This feels like a bug to me, but I'm sure there's a reason > behind this. Does anyone know why this is the case? > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.