feat: add additionalChannels

Author: cadojo

src/julia/devcontainer-feature.json

@@ -13,6 +13,11 @@
             ],
             "default": "release",
             "description": "Select a Juliaup channel"
+        },
+        "additionalChannels": {
+            "type": "string",
+            "default": "",
+            "description": "Additional Juliaup channels to install, separated by commas (e.g., 'nightly,1.10')"
         }
     },
     "installsAfter": [

src/julia/install.sh

@@ -1,8 +1,7 @@
 #!/bin/bash
 
 CHANNEL=${CHANNEL:-"release"}
-IFS=',' read -ra channels <<< "$CHANNEL"
-
+IFS=',' read -ra channels <<< "$ADDITIONALCHANNELS"
 USERNAME=${USERNAME:-${_REMOTE_USER:-"automatic"}}
 
 set -e
@@ -29,6 +28,13 @@ elif [ "${USERNAME}" = "none" ] || ! id -u "${USERNAME}" >/dev/null 2>&1; then
     USERNAME=root
 fi
 
+# Determine the home directory of the user
+if [ "${USERNAME}" = "root" ]; then
+    REMOTE_USER_HOME=${_REMOTE_USER_HOME:-"/root"}
+else
+    REMOTE_USER_HOME=${_REMOTE_USER_HOME:-"/home/${USERNAME}"}
+fi
+
 cleanup_apt() {
     # shellcheck source=/dev/null
     source /etc/os-release
@@ -53,9 +59,12 @@ export DEBIAN_FRONTEND=noninteractive
 cleanup_apt
 check_packages curl ca-certificates
 
-su ${USERNAME} -c 'curl -fsSL https://install.julialang.org | sh -s -- --yes'
+su ${USERNAME} -c "curl -fsSL https://install.julialang.org | sh -s -- --yes"
+
+su ${USERNAME} -c "${REMOTE_USER_HOME}/.juliaup/bin/juliaup add ${CHANNEL}"
+
 for channel in "${channels[@]}"; do
-    su ${USERNAME} -c '$(getent passwd "$USERNAME" | cut -d: -f6)/.juliaup/bin/juliaup add $channel'
+    su ${USERNAME} -c "${REMOTE_USER_HOME}/.juliaup/bin/juliaup add ${channel}"
 done
 
 # Clean up