person(given = "Kirill", family = "Müller", role = c("aut",
        "cre"), email = "krlmlr+r@mailbox.org")
Robust, reliable and flexible paths to files below a
    project root. The 'root' of a project is defined as a directory
    that matches a certain criterion, e.g., it contains a certain
    regular file.
testthat, mockr, knitr, withr, rmarkdown
'rrmake.R' 'criterion.R' 'file.R' 'has-file.R' 'root.R'
'rprojroot-package.R' 'shortcut.R' 'thisfile.R'