Nothing
validate.pkg_vrs <- function(pkg, vrs, date, ignore.deps)
{
#1 If base pkg, stop
if (pkg %in% base_pkg()) return('')
#2 Merge pkg_vrs
pkg_vrs <- paste0(pkg, "_", vrs)
#3 No 'groundhog'
if ("groundhog" == pkg) {
msg <- paste0(
"You may not use groundhog.library() to load groundhog.\n",
"To load the version of groundhog available on '", date, "', you may run:\n",
"meta.groundhog('" , date , "')",
)
gstop(msg) #util #51)
} #End if groundhog
#4 Read Active
#4.1 Read active
active <- get.active()
#4.2 Read attached
attached.list= utils::sessionInfo()$otherPkgs
attached.pkg <- names(attached.list)
attached.vrs <- unlist(lapply(attached.list, function(x) x$Version))
attached.pkg_vrs <- paste0(attached.pkg , "_" , attached.vrs)
attached.base.pkg_vrs <- paste0(utils::sessionInfo()$basePkgs,"_",getRversion()) #add base pkgs
attached.pkg_vrs <- c(attached.pkg_vrs,attached.base.pkg_vrs)
#5 Early return if already attached
if (pkg_vrs %in% attached.pkg_vrs) {
#message1("The package '", pkg_vrs, "' is already attached.")
return('already_attached')
}
#6 End otherwise
return(invisible(''))
} #End function
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