Root directory of the drake project,
or if search is TRUE, either the
project root or a subdirectory of the project.
Ignored if a cache is supplied.
search
logical. If TRUE, search parent directories
to find the nearest drake cache. Otherwise, look in the
current working directory only.
Ignored if a cache is supplied.
cache
drake cache. See new_cache().
If supplied, path and search are ignored.
verbose
logical or numeric, control printing to the console.
Use pkgconfig to set the default value of verbose
for your R session:
for example, pkgconfig::set_config("drake::verbose" = 2).