path_package: Construct a path to a location within an installed or development package
Description
path_package differs from system.file() in that it always returns an
error if the package does not exist. It also returns a different error if
the file within the package does not exist.
Usage
path_package(package, ...)
Arguments
package
Name of the package to in which to search
...
Additional paths appended to the package path by path().
Details
path_package() also automatically works with packages loaded with devtools
even if the path_package() call comes from a different package.