A root is defined as a directory that contains a regular file whose name matches a given pattern and which optionally contains a given text. The search for a root starts at a given directory (the working directory by default), and proceeds up the directory hierarchy.
get_root_desc() returns the description of the criterion
for a root path. This is especially useful for composite root criteria
created with |.root_criterion().
find_root(criterion, path = ".")
get_root_desc(criterion, path)[root_criterion]
A criterion, one of the predefined criteria
or created by root_criterion().
Will be coerced using as_root_criterion().
[character(1)]
The start directory.
The normalized path of the root as specified by the search criterion. Throws an error if no root is found
Starting from the working directory, the find_root() function searches
for the root.
If a root is found, the ... arguments are used to construct a path;
thus, if no extra arguments are given, the root is returned.
If no root is found, an error is thrown.
if (FALSE) { # \dontrun{
find_root(glob2rx("DESCRIPTION"), "^Package: ")
} # }