Excessive depth in document error causing issues for dependent package rNOMADS

[dannycbowman]

I maintain the rNOMADS package, which relies on xml2 to parse large lists of web-hosted files. Unfortunately, attempts to retrieve some file list fails with

Error: Excessive depth in document: 256 use XML_PARSE_HUGE option [1]

I have spent a great deal of time attempting to reset this depth in order to permit my users to download the data they need. However, I believe this depth is hard coded and thus can't be changed. This is a serious issue for the proper functioning of my package. The only work around I can provide is to ask my users to download a forked version of xml2 that is not available on CRAN:

library(drat)
drat:::add("shabbychef")
install.packages('xml2'

Would it be possible to implement shabbychef's fix in the official xml2 repository, so I can easily make it available to my users?
To reproduce error:

library(xml2)
library(lubridate)

date.today <- format(now(tz = "UTC"), "%Y%m%d")
url <- paste0("http://nomads.ncep.noaa.gov/cgi-bin/filter_rap.pl?dir=%2Frap.", date.today)
xml2::read_html(url)

[hadley]

Do you want to submit a pull request?

[jimhester]

This is a dupe of #62