Wrapper around script found here:
https://gist.github.com/yihui/2143971
devtools::install_github("jhnwllr/nppac")A file named R.xml saves to C:/Program Files/Notepad++/autoCompletion/. You might have to change permissions on the folder for the script work.
# load the libraries you want have autocomplete for.
sapply(c('rgbif','purrr','dplyr', 'ggplot2'), library, character.only = TRUE)
nnp_ac() # save R.xml to dir