.travis.yml

# R for travis: see documentation at https://docs.travis-ci.com/user/languages/r

language: R
latex: false # installing missing packages does not work well with default tex distribution
sudo: false
cache:
  packages: true

before_install: 
# decrypt and install commercial fonts needed to build the pdf
  - openssl aes-256-cbc -K $encrypted_b52386f09d9a_key -iv $encrypted_b52386f09d9a_iv -in tex/fonts.tar.enc -out fonts.tar -d # decrypt
  - tar xvf fonts.tar # unzip
  - mkdir $HOME/.fonts # create directory where latex can find the fonts
  - cp -a $TRAVIS_BUILD_DIR/fonts/. $HOME/.fonts/ # copy the font files
  - fc-cache -f -v # build font info
# use tinytex instead of default tex distribution  
  - Rscript -e 'tinytex::install_tinytex()'
  - Rscript -e 'tinytex::tlmgr_install("hyphen-dutch")' # only package tinytex will not auto-detect as missing
  
script:
  - Rscript -e 'bookdown::render_book("index.Rmd", "bookdown::pdf_book")' # build the pdf
  - Rscript -e 'bookdown::render_book("index.Rmd", "bookdown::gitbook")' # run html last, so it can link to the pdf file
  
deploy:
  provider: pages
  local_dir: _book
  skip_cleanup: true
  keep-history: true
  github_token: $GITHUB_TOKEN
  target_branch: gh-pages