[ci] switch CRAN mirror to RStudio (#5230)

.ci/test_r_package.sh

 #!/bin/bash
 
 # set up R environment
-CRAN_MIRROR="https://cloud.r-project.org/"
+CRAN_MIRROR="https://cran.rstudio.com"
 R_LIB_PATH=~/Rlib
 mkdir -p $R_LIB_PATH
 export R_LIBS=$R_LIB_PATH
@@ -17,12 +17,12 @@ fi
 R_MAJOR_VERSION=( ${R_VERSION//./ } )
 if [[ "${R_MAJOR_VERSION}" == "3" ]]; then
     export R_MAC_VERSION=3.6.3
-    export R_MAC_PKG_URL=https://cran.r-project.org/bin/macosx/R-${R_MAC_VERSION}.pkg
+    export R_MAC_PKG_URL=${CRAN_MIRROR}/bin/macosx/R-${R_MAC_VERSION}.pkg
     export R_LINUX_VERSION="3.6.3-1bionic"
     export R_APT_REPO="bionic-cran35/"
 elif [[ "${R_MAJOR_VERSION}" == "4" ]]; then
     export R_MAC_VERSION=4.1.3
-    export R_MAC_PKG_URL=https://cran.r-project.org/bin/macosx/base/R-${R_MAC_VERSION}.pkg
+    export R_MAC_PKG_URL=${CRAN_MIRROR}/bin/macosx/base/R-${R_MAC_VERSION}.pkg
     export R_LINUX_VERSION="4.1.3-1.2004.0"
     export R_APT_REPO="focal-cran40/"
 else
@@ -40,7 +40,7 @@ if [[ $OS_NAME == "linux" ]]; then
         --keyserver keyserver.ubuntu.com \
         --recv-keys E298A3A825C0D65DFD57CBB651716619E084DAB9
     sudo add-apt-repository \
-        "deb https://cloud.r-project.org/bin/linux/ubuntu ${R_APT_REPO}"
+        "deb ${CRAN_MIRROR}/bin/linux/ubuntu ${R_APT_REPO}"
     sudo apt-get update
     sudo apt-get install \
         --no-install-recommends \

.ci/test_r_package_valgrind.sh

 #!/bin/bash
 
-RDscriptvalgrind -e "install.packages(c('R6', 'data.table', 'jsonlite', 'knitr', 'Matrix', 'RhpcBLASctl', 'rmarkdown', 'testthat'), repos = 'https://cran.r-project.org', Ncpus = parallel::detectCores())" || exit -1
+RDscriptvalgrind -e "install.packages(c('R6', 'data.table', 'jsonlite', 'knitr', 'Matrix', 'RhpcBLASctl', 'rmarkdown', 'testthat'), repos = 'https://cran.rstudio.com', Ncpus = parallel::detectCores())" || exit -1
 sh build-cran-package.sh \
   --r-executable=RDvalgrind \
   || exit -1

.ci/test_r_package_windows.ps1

@@ -87,7 +87,7 @@ if ($env:R_MAJOR_VERSION -eq "3") {
 $env:R_LIB_PATH = "$env:BUILD_SOURCESDIRECTORY/RLibrary" -replace '[\\]', '/'
 $env:R_LIBS = "$env:R_LIB_PATH"
 $env:PATH = "$env:RTOOLS_BIN;" + "$env:RTOOLS_MINGW_BIN;" + "$env:R_LIB_PATH/R/bin/x64;" + "$env:R_LIB_PATH/miktex/texmfs/install/miktex/bin/x64;" + $env:PATH
-$env:CRAN_MIRROR = "https://cloud.r-project.org/"
+$env:CRAN_MIRROR = "https://cran.rstudio.com"
 $env:CTAN_MIRROR = "https://ctan.math.illinois.edu/systems/win32/miktex"
 $env:CTAN_PACKAGE_ARCHIVE = "$env:CTAN_MIRROR/tm/packages/"
 $env:MIKTEX_EXCEPTION_PATH = "$env:TEMP\miktex"
@@ -109,7 +109,7 @@ tzutil /s "GMT Standard Time"
 
 # download R and RTools
 Write-Output "Downloading R and Rtools"
-Download-File-With-Retries -url "https://cran.r-project.org/bin/windows/base/old/$env:R_WINDOWS_VERSION/R-$env:R_WINDOWS_VERSION-win.exe" -destfile "R-win.exe"
+Download-File-With-Retries -url "$env:CRAN_MIRROR/bin/windows/base/old/$env:R_WINDOWS_VERSION/R-$env:R_WINDOWS_VERSION-win.exe" -destfile "R-win.exe"
 Download-File-With-Retries -url "https://github.com/microsoft/LightGBM/releases/download/v2.0.12/$env:RTOOLS_EXE_FILE" -destfile "Rtools.exe"
 
 # Install R

.github/workflows/r_package.yml

@@ -191,7 +191,7 @@ jobs:
       - name: Install packages
         shell: bash
         run: |
-          RDscript${{ matrix.r_customization }} -e "install.packages(c('R6', 'data.table', 'jsonlite', 'knitr', 'Matrix', 'RhpcBLASctl', 'rmarkdown', 'testthat'), repos = 'https://cran.r-project.org', Ncpus = parallel::detectCores())"
+          RDscript${{ matrix.r_customization }} -e "install.packages(c('R6', 'data.table', 'jsonlite', 'knitr', 'Matrix', 'RhpcBLASctl', 'rmarkdown', 'testthat'), repos = 'https://cran.rstudio.com', Ncpus = parallel::detectCores())"
           sh build-cran-package.sh --r-executable=RD${{ matrix.r_customization }}
           RD${{ matrix.r_customization }} CMD INSTALL lightgbm_*.tar.gz || exit -1
       - name: Run tests with sanitizers
@@ -225,7 +225,7 @@ jobs:
         shell: bash
         run: |
           export PATH=/opt/R-devel/bin/:${PATH}
-          Rscript -e "install.packages(c('R6', 'data.table', 'jsonlite', 'knitr', 'Matrix', 'RhpcBLASctl', 'rmarkdown', 'testthat'), repos = 'https://cran.r-project.org', Ncpus = parallel::detectCores())"
+          Rscript -e "install.packages(c('R6', 'data.table', 'jsonlite', 'knitr', 'Matrix', 'RhpcBLASctl', 'rmarkdown', 'testthat'), repos = 'https://cran.rstudio.com', Ncpus = parallel::detectCores())"
           sh build-cran-package.sh
           R CMD check --as-cran --run-donttest lightgbm_*.tar.gz || exit -1
           if grep -q -E "NOTE|WARNING|ERROR" lightgbm.Rcheck/00check.log; then

.github/workflows/static_analysis.yml

@@ -60,7 +60,7 @@ jobs:
       - name: Install packages
         shell: bash
         run: |
-          Rscript -e "install.packages(c('R6', 'data.table', 'jsonlite', 'knitr', 'Matrix', 'RhpcBLASctl', 'rmarkdown', 'roxygen2', 'testthat'), repos = 'https://cran.r-project.org', Ncpus = parallel::detectCores())"
+          Rscript -e "install.packages(c('R6', 'data.table', 'jsonlite', 'knitr', 'Matrix', 'RhpcBLASctl', 'rmarkdown', 'roxygen2', 'testthat'), repos = 'https://cran.rstudio.com', Ncpus = parallel::detectCores())"
           sh build-cran-package.sh || exit -1
           R CMD INSTALL --with-keep.source lightgbm_*.tar.gz || exit -1
       - name: Test documentation

.vsts-ci.yml

@@ -317,7 +317,7 @@ jobs:
       R_LIB_PATH=~/Rlib
       export R_LIBS=${R_LIB_PATH}
       mkdir -p ${R_LIB_PATH}
-      RDscript -e "install.packages(c('R6', 'data.table', 'jsonlite', 'knitr', 'Matrix', 'RhpcBLASctl', 'rmarkdown'),  lib = '${R_LIB_PATH}', dependencies = c('Depends', 'Imports', 'LinkingTo'), repos = 'https://cran.r-project.org', Ncpus = parallel::detectCores())" || exit -1
+      RDscript -e "install.packages(c('R6', 'data.table', 'jsonlite', 'knitr', 'Matrix', 'RhpcBLASctl', 'rmarkdown'),  lib = '${R_LIB_PATH}', dependencies = c('Depends', 'Imports', 'LinkingTo'), repos = 'https://cran.rstudio.com', Ncpus = parallel::detectCores())" || exit -1
       sh build-cran-package.sh --r-executable=RD || exit -1
       mv lightgbm_${LGB_VER}.tar.gz $(Build.ArtifactStagingDirectory)/lightgbm-${LGB_VER}-r-cran.tar.gz
     displayName: 'Build CRAN R-package'