Reduce dependencies
nfrerebeau opened this issue · 0 comments
nfrerebeau commented
ggplot2
, scales
and spacesXYZ
should be suggested packages, so that khroma
only imports grDevices
and grid
.
We need to check if a suggested package is available before using it:
if (!requireNamespace("pkg", quietly = TRUE)) {
stop("Package \"pkg\" needed for this function to work. Please install it.", call. = FALSE)
}
An alternative would be to create a new package without dependencies (such as viridis
and viridisLite
) containing only the colour()
function.