[ci] [R-package] macOS CI jobs failing: "Download failed on Cask 'basictex'"

[jameslamb]

Description

macOS R-package CI jobs here started failing some time in the last few days, with errors like this:

==> Downloading https://mirror.ctan.org/systems/mac/mactex/mactex-basictex-20230314.pkg
curl: (22) The requested URL returned error: 404
Error: Download failed on Cask 'basictex' with message: Download failed: https://mirror.ctan.org/systems/mac/mactex/mactex-basictex-20230314.pkg
Error: Process completed with exit code 1.

Reproducible example

All macOS R-package jobs in this project. Example build: (build link)

Additional Comments

I believe this is happening right here:

LightGBM/.ci/test_r_package.sh

Line 90 in b27d81e

brew install basictex || exit 1

basictex's formula was updated about a week ago, to version 2024.0309:

• basictex: basictex 2024.0309 Homebrew/homebrew-cask#168996

and mactex's to 2024.0312

• mactex: mactex 2024.0312 Homebrew/homebrew-cask#168992
• mactex-no-gui: mactex-no-gui 2024.0312 Homebrew/homebrew-cask#168993

I suspect that mirrors have been updated to include those new packages and that the old ones have been removed, but Homebrew in CI is still looking for the old versions.

Maybe a brew update will help, as described in these:

• Errors on brew install mactex Homebrew/homebrew-cask#143642 (comment)
• [ci] remove brew update-reset again (fixes #5670) #5925
• [ci] fix LaTeX tools installation in R jobs (fixes #5802) #5807
• [ci] run 'brew update' in macOS jobs (fixes #4160) #4161

[jameslamb]

Seems that just adding the following on macOS jobs in #6357 fixed this:

brew update-reset
brew update

Think that's evidence that the issue was "there was a new basictex release and Homebrew in GitHub Actions' VMs just needed to be updated to look for it".

[jameslamb]

This was resolved by #6357