This is the mechanism by which install.packages
determines which packages
should be installed from where. With this override, we can indicate arbitrary
repos
, Package
, File
for each individual package.
Arguments
- toInstall
A
pkgDT
object- repos
The remote repository (e.g., a CRAN mirror), passed to either
install.packages
,install_github
orinstallVersions
.- purge
Logical. Should all caches be purged? Default is
getOption("Require.purge", FALSE)
. There is a lot of internal caching of results throughout theRequire
package. These help with speed and reduce calls to internet sources. However, sometimes these caches must be purged. The cached values are renewed when found to be too old, with the age limit. This maximum age can be set in seconds with the environment variableR_AVAILABLE_PACKAGES_CACHE_CONTROL_MAX_AGE
, or if unset, defaults to 3600 (one hour – seeutils::available.packages
).Internally, there are calls to
available.packages
.- type
- verbose
Numeric or logical indicating how verbose should the function be. If -1 or -2, then as little verbosity as possible. If 0 or FALSE, then minimal outputs; if
1
or TRUE, more outputs;2
even more. NOTE: inRequire
function, whenverbose >= 2
, also returns details as ifreturnDetails = TRUE
(for backwards compatibility).