I've had books building just fine on Travis CI, but now PDF builds are failing.
After this command:
/usr/bin/pandoc +RTS -K512m -RTS Ryle-Duties_of_Parents.utf8.md --to latex --from markdown+autolink_bare_uris+tex_math_single_backslash --output Ryle-Duties_of_Parents.tex --lua-filter /home/travis/R/Library/bookdown/rmarkdown/lua/custom-environment.lua --lua-filter /home/travis/R/Library/rmarkdown/rmarkdown/lua/pagebreak.lua --lua-filter /home/travis/R/Library/rmarkdown/rmarkdown/lua/latex-div.lua --metadata-file /tmp/RtmpLct6D7/file38194b188a34 --self-contained --table-of-contents --toc-depth 3 --number-sections --highlight-style tango --pdf-engine xelatex --natbib --include-in-header classics-template-files/latex/preamble.tex --include-before-body classics-template-files/latex/before_body.tex --variable graphics --wrap preserve --variable tables=yes --standalone -Mhas-frontmatter=false
I get the following:
No connection to the internet.
1065Unable to download the checksum of the remote TeX Live database,
1066but found a local copy so using that.
1067
1068You may want to try specifying an explicit or different CTAN mirror;
1069see the information and examples for the -repository option at
1070http://tug.org/texlive/doc/install-tl.html
1071(or in the output of install-tl --help).
1072
1073tlmgr: package repository http://ftp.math.purdue.edu/mirrors/ctan.org/systems/texlive/tlnet (not verified: unknown)
1074[1/1, ??:??/??:??] install: unicode-math [40k]
1075TLPDB::_install_package: downloading did not succeed
1076tlmgr: package log updated: /home/travis/texlive/texmf-var/web2c/tlmgr.log
1077tlmgr update --self
1078No connection to the internet.
1079
Does anybody know why this would have started happening, or how I can fix it? Obviously there is an internet connection, and it's working for everything else. However, that Purdue ctan url does seem to be down. Is that the problem? If so, how would I go about fixing this in bookdown on Travis?