bug#40262: R: server certificate verification failed.

[Jonathan Brielmaier <jonathan.brielmaier@web.de>]

Hi,

while trying to run a simple R script on my guix server, I stumbled upon
a problem with HTTPS and R. It's nothing urgent...

reproducer.R
library(jsonlite)
library(tidyverse)
library(lubridate)
api_parking <- "https://guix.gnu.org/packages.json"
parking.raw <- fromJSON(api_parking, simplifyDataFrame = TRUE)

$ R CMD BATCH reproducer.R
[...]
> library(jsonlite)
> library(tidyverse)
── Attaching packages ─────────────────────────────────────── tidyverse
1.3.0 ──
✔ ggplot2 3.3.0     ✔ purrr   0.3.3
✔ tibble  2.1.3     ✔ dplyr   0.8.5
✔ tidyr   1.0.2     ✔ stringr 1.4.0
✔ readr   1.3.1     ✔ forcats 0.5.0
── Conflicts ──────────────────────────────────────────
tidyverse_conflicts() ──
✖ dplyr::filter()  masks stats::filter()
✖ purrr::flatten() masks jsonlite::flatten()
✖ dplyr::lag()     masks stats::lag()
> library(lubridate)

Attaching package: ‘lubridate’

The following object is masked from ‘package:base’:

    date

> api_parking <- "https://guix.gnu.org/packages.json"
> parking.raw <- fromJSON(api_parking, simplifyDataFrame = TRUE)
Error in open.connection(con, "rb") :
  server certificate verification failed. CAfile: none CRLfile: none
Calls: fromJSON ... parse_and_simplify -> parseJSON -> parse_con -> open
-> open.connection
Execution halted

For the record my SSL/HTTPS related variables.
$ echo $SSL_CERT_DIR
/etc/ssl/certs
echo $SSL_CERT_FILE
/etc/ssl/certs/ca-certificates.crt
echo $CURL_CA_BUNDLE
/run/current-system/profile/etc/ssl/certs/ca-certificates.crt

All required packages (r, r-*, nss-certs) are installed system wide.

Regards Jonathan