Configuration options for several pkgdepends classes. Not all classes
use all of these options. E.g. a
pkg_download_proposal is not concerned
about package libraries, so it'll ignore the
cache_dir: directory to download the packages to. Defaults to a
temporary directory within the R session temporary directory, see
package_cache_dir: package cache location of
pkgcache::package_cache. The default is the pkgcache default.
platforms: Character vector of platforms to download or install
for. Possible platforms are
to the current platform, and
cran-mirror: CRAN mirror to use. Defaults to the
base::options()), if that's not set then
dependencies: Dependencies to consider or download or install.
Defaults to the hard dependencies, see
r-versions: Character vector, R versions to download or install
packages for. It defaults to the current R version.
build-vignettes: Whether to build vignettes for package trees.
This is only used if the package is obtained from a package tree,
and not from a source (or binary) package archive. By default vignettes
are not built in this case. If you set this to
TRUE, then you need
to make sure that the vignette builder packages are available, as
these are not installed by default currently.
metadata-update-after: A time interval as a difftime object.
pkgdepends will update the metadata cache if it is older than this.
The default is one day.