Loading Local Library in R with Prerequisites Together

Question

For example, I have a local broom package, which has several prerequisite libraries such as backports.

install.packages("broom",lib=file.path(Sys.getenv("userprofile"),"desktop","project"))

I found that the following library does not load the necessary prerequisites together.

library(broom,lib.loc=file.path(Sys.getenv("userprofile"),"desktop","project"))

Error: package or namespace load failed for ‘broom’:
 .onLoad failed in loadNamespace() for 'pillar', details:
  call: loadNamespace(name)
  error: there is no package called ‘crayon’

I already have those prerequisites since install.packages downloads them together. Should one load all the prerequisite libraries (such as backports) before loading the package I want to use (i.e., broom)?

Answer 1

I made this function that basically loads the dependencies of the passed packages now all you need to do is run it before loading broom then it'll load the dependencies.

# loads dependencies of passed packages
# can be used in two forms :
#     load.dep(broom, tidyr)
#.    load.dep("broom", "tidyr")
load.dep <- function(...){
    x <- as.list(substitute(...()))
    stopifnot(length(x)>0)
    x <- sapply(x, as.character)
    avp <- available.packages()
    pkgs <- unlist(strsplit(avp[x, c("Imports","Depends")], split=" ?(\\([^)]+?\\))?, ?"), use.names=F)
    invisible(lapply(pkgs[!grepl('^(\\n|R )', pkgs)], library, character.only=T))
}