01/03: doc: Document certificate environment variable needed for R.

[Ricardo Wurmus]

rekado pushed a commit to branch master
in repository guix.

commit 63657335554eba6c70828b105a19ba7236f6ba2a
Author: Ricardo Wurmus <address@hidden>
Date:   Sun May 14 23:37:14 2017 +0200

    doc: Document certificate environment variable needed for R.
    
    * doc/guix.texi (X.509 Certificates): Document R as a special case.
---
 doc/guix.texi | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/doc/guix.texi b/doc/guix.texi
index 43ed051..0b2742c 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -14932,6 +14932,19 @@ $ export 
SSL_CERT_FILE="$HOME/.guix-profile/etc/ssl/certs/ca-certificates.crt"
 $ export GIT_SSL_CAINFO="$SSL_CERT_FILE"
 @end example
 
+As another example, R requires the @code{CURL_CA_BUNDLE} environment
+variable to point to a certificate bundle, so you would have to run
+something like this:
+
address@hidden
+$ guix package -i nss-certs
+$ export CURL_CA_BUNDLE="$HOME/.guix-profile/etc/ssl/certs/ca-certificates.crt"
address@hidden example
+
+For other applications you may want to look up the required environment
+variable in the relevant documentation.
+
+
 @node Name Service Switch
 @subsection Name Service Switch