determine release name, closes #1

install_r.sh

@@ -1,18 +1,21 @@
 #!/bin/bash
 
+# determine Ubuntu release
+source /etc/os-release
+
 ## First: update apt and get keys
 apt-get update -qq && apt-get install --yes --no-install-recommends wget ca-certificates gnupg
 wget -q -O- https://eddelbuettel.github.io/r2u/assets/dirk_eddelbuettel_key.asc \
     | tee -a /etc/apt/trusted.gpg.d/cranapt_key.asc
 
 ## Second: add the repo -- here we use the well-connected mirror
-echo "deb [arch=amd64] https://r2u.stat.illinois.edu/ubuntu noble main" > /etc/apt/sources.list.d/cranapt.list
+echo "deb [arch=amd64] https://r2u.stat.illinois.edu/ubuntu ${UBUNTU_CODENAME} main" > /etc/apt/sources.list.d/cranapt.list
 apt-get update
 
 ## Third: ensure current R is used
 wget -q -O- https://cloud.r-project.org/bin/linux/ubuntu/marutter_pubkey.asc \
     | tee -a /etc/apt/trusted.gpg.d/cran_ubuntu_key.asc
-echo "deb [arch=amd64] https://cloud.r-project.org/bin/linux/ubuntu noble-cran40/" > /etc/apt/sources.list.d/cran_r.list
+echo "deb [arch=amd64] https://cloud.r-project.org/bin/linux/ubuntu ${UBUNTU_CODENAME}-cran40/" > /etc/apt/sources.list.d/cran_r.list
 apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 67C2D66C4B1D4339 51716619E084DAB9
 apt-get update -qq
 DEBIAN_FRONTEND=noninteractive apt-get install --yes --no-install-recommends r-base r-base-dev r-recommended

install_rstudio.sh

@@ -17,7 +17,7 @@ apt-get update && apt-get -y install \
     wget
 
 ARCH=$(dpkg --print-architecture)
-UBUNTU_CODENAME="noble"
+source /etc/os-release
 
 ## Download RStudio Server for Ubuntu 18+
 DOWNLOAD_FILE=rstudio-server.deb