From 2955cbfcda5d718a45fae1ffc8248dac549ea48e Mon Sep 17 00:00:00 2001
From: Ryan Lovett <rylo@berkeley.edu>
Date: Fri, 4 Oct 2024 14:19:28 -0700
Subject: [PATCH] Set XDG_RUNTIME_DIR.

---
 Dockerfile.appendix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Dockerfile.appendix b/Dockerfile.appendix
index ebaadb4..73b4572 100644
--- a/Dockerfile.appendix
+++ b/Dockerfile.appendix
@@ -1,5 +1,12 @@
 USER root
 
+# xeus-octave complains when XDG_RUNTIME_DIR is not set.
+# We dynamically determine the UID, persist XDG_RUNTIME_DIR, and create the dir.
+RUN NB_USER_UID=$(id -u ${NB_USER}) && \
+    XDG_RUNTIME_DIR=/run/user/${NB_USER_UID} && \
+    echo "XDG_RUNTIME_DIR=/run/user/${NB_USER_UID}" >> /etc/environment && \
+    install -d -m 0700 -o ${NB_USER} -g ${NB_USER} ${XDG_RUNTIME_DIR}
+
 # As requested in slack.
 # http://www.dcc.fc.up.pt/gtries/
 # https://github.com/ComplexNetworks-DCC-FCUP/gtrieScanner