Hi, I've began to create a template for the CVPR conference's stylesheet (see http://cvpr2020.thecvf.com/submission/main-conference/author-guidelines#submission-guidelines).
It's a work in progress, I created this pull request to ask questions if necessary and to avoid somebody to make this work twice.

TODO List:

• Harmonize the API to be similar to other papers
• Check that resulting documents are compliant with the rules
• Create a good example file
• Sign the contributor agreement
• Add the journalname_article() function to R/article.R if the output format is simple enough, otherwise create a separate R/journalname_article.R.
• Add the Pandoc LaTeX template inst/rmarkdown/templates/journalname_article/resources/template.tex.
• Add a skeleton article inst/rmarkdown/templates/journalname_article/skeleton/skeleton.Rmd.
• Add a description of the template inst/rmarkdown/templates/journalname_article/template.yaml.
• Please include the document class file (*.cls) if needed, but please do not include standard LaTeX packages (*.sty) that can be downloaded from CTAN. Please keep the number of new files absolutely minimal, and also make examples minimal (e.g., if you need a .bib example, try to only leave one or two bibliography entries in it, and don't include one hundred items in it without using all of them).
• Update Rd and namespace (could be done by devtools::document()).
• Update NEWS.
• Update README with a link to the newly supported journal.
• Add a test to tests/testit/test-formats.R.
• Add your name to the list of authors Authors@R in DESCRIPTION. You don't need to bump the package version in DESCRIPTION.

Issues

About the document usage, I don't understand how to tell knitr to search sty files inside the inst folder. I checked it in acm_article example but it doesn't seems to work either.