[R-package] silence more logs in unit tests

[jameslamb]

Contributes to #4862.

This PR proposes additional changes to silence logs in the R package's tests.

Notes for Reviewers

As of #5209, it's safe to change the verbosity in calls to lightgbm() without worrying about validation and early stopping.

Using the following code, I found that this PR reduces the output of the R package's tests from 636 lines to 73 lines.

sh build-cran-package --no-build-vignettes
R CMD INSTALL --with-keep.source ./lightgbm_3.3.2.99.tar.gz
cd R-package/tests
Rscript testthat.R > ../../out.log 2>&1
echo "log lines from tests: $(cat ../../out.log | wc -l)"

[jameslamb]

I see what looks like a bunch of networking-related issues across different R CI jobs.

r-package (windows-latest, MINGW, R 3.6, cmake) (build link)

Downloading https://cran.r-project.org/bin/windows/base/old/3.6.3/R-3.6.3-win.exe
Invoke-WebRequest: D:\a\LightGBM\LightGBM\.ci\test_r_package_windows.ps1:12
Line |
  12 |      Invoke-WebRequest -Uri $url -OutFile $destfile
     |      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | No connection could be made because the target machine actively refused it.

r-sanitizers (ubuntu-latest, R-devel, gcc ASAN/UBSAN) (build link)

Warning: unable to access index for repository https://cran.r-project.org/src/contrib:
  cannot open URL 'https://cran.r-project.org/src/contrib/PACKAGES'

And I see CRAN unavailable from my laptop as well.

curl -I cran.r-project.org
# curl: (7) Failed to connect to cran.r-project.org port 80: Connection refused

curl -I http://cran.r-project.org
# curl: (7) Failed to connect to cran.r-project.org port 80: Connection refused

curl -I https://cran.r-project.org
# curl: (7) Failed to connect to cran.r-project.org port 443: Connection refused

I think CRAN may be down.

[StrikerRUS]

I think CRAN may be down.

Yeah, it seems so. Still down...

[jameslamb]

Looks like it is STILL down 😫

Dirk makes a good point in https://stat.ethz.ch/pipermail/r-devel/2022-May/081749.html ...other mirrors exist. I'm going to push a commit PR proposing switching to another mirror like https://cran.rstudio.com/, which is up right now and which I expect might continue to have higher availability, since it is backed by a for-profit company and presumably supported by an on-call support staff.

[jameslamb]

Just updated this to latest master now that #5230 has been merged. That should help with CI. Will merge this if CI jobs all pass.

[github-actions]

This pull request has been automatically locked since there has not been any recent activity since it was closed. To start a new related discussion, open a new issue at https://github.com/microsoft/LightGBM/issues including a reference to this.