I am trying to straighten up my DSE package to use require() as that seems to be
a good mechanism. I have several packages: dse requires tframe which requires
syskern which masks a few methods in base ( RNGkind rnorm runif).
If I do require(dse) I get 3 copies of a six line warning (lots of white space)
about syskern methods masking base methods. If I use library(dse) I only get 2.
(I've simplified the situation somewhat, I really have five or six levels
of
requires and lots and lots of warning messages.) It would be nice if a single
warning could be produced, but at least could require() please be modified with
a warn.conflicts argument which is passed to library. Below is a fixed version.
Paul Gilbert
_______
require <- function (name, quietly = FALSE, warn.conflicts=TRUE)
{
name <- as.character(substitute(name))
if (!exists(".Provided", inherits = TRUE))
assign(".Provided", character(0), envir = .GlobalEnv)
if (is.na(match(paste("package", name, sep = ":"),
search())) &&
is.na(match(name, .Provided))) {
if (!quietly)
cat("Loading required package:", name, "\n")
library(name, char = TRUE, logical = TRUE,
warn.conflicts=warn.conflicts)
}
else TRUE
}
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