copy_dir                Copy the contents of a directory
cygwinify_path          Make a path suitable for cygwin
decompose_path          Split a path into its components
get_drive               On Windows, return the drive of the path
os_path                 The OS path
pathological            pathological: utilities for paths, files and
                        directories.
r_home                  The R home directory
split_path              Split a path into directory components
standardize_path        Standardize paths
sys_which               Find paths to executables
system_file             Find a file in a package
temp_dir                Create a temp file/dir
