[Rd] install.packages doesn't produce warnings unless qualified with utils::

[David Hugh-Jones]

Hi all,

Assuming this is an R core issue:

tryCatch(install.packages("clipr", repos = "bullshit"), warning = function
(w) cat("got a warning"))
Warning in install.packages :
  unable to access index for repository bullshit/src/contrib:
  cannot open URL 'bullshit/src/contrib/PACKAGES'
Warning in install.packages :
  package ‘clipr’ is not available (for R version 3.4.3)
Warning in install.packages :
  unable to access index for repository
bullshit/bin/macosx/el-capitan/contrib/3.4:
  cannot open URL 'bullshit/bin/macosx/el-capitan/contrib/3.4/PACKAGES'

In other words, lots of warnings, but none are caught.

It works if you use the fully qualified version in utils:

tryCatch(utils::install.packages("clipr", repos = "bullshit"), warning =
function (w) cat("got a warning"))
got a warning

Any ideas?
Cheers,
David

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