Error on master during creating R-package artifact

[StrikerRUS]

The error is

/usr/bin/bash --noprofile --norc /__w/_temp/a33835bd-d281-4493-92c1-a75b47d5fc5a.sh
Installing packages into ‘/usr/local/lib/R/site-library’
(as ‘lib’ is unspecified)
Warning in install.packages(c("R6", "data.table", "jsonlite", "knitr", "Matrix",  :
  'lib = "/usr/local/lib/R/site-library"' is not writable
Error in install.packages(c("R6", "data.table", "jsonlite", "knitr", "Matrix",  : 
  unable to install packages
Execution halted
##[error]Bash exited with code '255'.

https://dev.azure.com/lightgbm-ci/lightgbm-ci/_build/results?buildId=11589&view=logs&j=5da18647-a2c4-530c-67bd-d83884ef8652&t=35f4e228-47be-5b41-fe2b-23aac79c123c

We are not creating R-package artifact for PRs, that's why #4775 passed all CI checks.

LightGBM/.vsts-ci.yml

Line 296 in 5fa887b

condition: not(startsWith(variables['Build.SourceBranch'], 'refs/pull/'))

We need to comment that line during testing a fix and then uncomment it back.

I guess we just should either set env variable for a writable directory

LightGBM/.ci/test_r_package.sh

Lines 5 to 7 in 5fa887b

	R_LIB_PATH=~/Rlib
	mkdir -p $R_LIB_PATH
	export R_LIBS=$R_LIB_PATH

or specify it as lib argument

LightGBM/.ci/test_r_package.sh

Line 108 in 5fa887b

Rscript --vanilla -e "options(install.packages.compile.from.source = '${compile_from_source}'); install.packages(${packages}, repos = '${CRAN_MIRROR}', lib = '${R_LIB_PATH}', dependencies = c('Depends', 'Imports', 'LinkingTo'), Ncpus = parallel::detectCores())" || exit -1

cc @jameslamb

[jameslamb]

Ah! Thanks for writing this up. I can test in a few hours.

[StrikerRUS]

Thank you! Feel free to use my branch: https://github.com/microsoft/LightGBM/tree/fix_r_artifact.

[github-actions]

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