refactor: install computing dependencies inside image

.devcontainer/devcontainer.json

@@ -9,7 +9,6 @@
 		// 	"installChromium": "false"
 		// }
 	},
-	"postStartCommand": ["bash", "init.sh"],
 	"customizations": {
 		"vscode": {
 			"extensions": [

.github/.devcontainer/Dockerfile

@@ -1,2 +1,2 @@
 ARG VARIANT="jammy"
-FROM buildpack-deps:${VARIANT}-curl
+FROM --platform=linux/amd64 buildpack-deps:${VARIANT}-curl

.github/.devcontainer/devcontainer.json

@@ -35,6 +35,9 @@
 		"ghcr.io/julialang/devcontainer-features/julia:1": {
 			"channel": "release"
 		},
+		"./quarto-computing-dependencies": {
+			"dependencies": "all"
+		},
 		"ghcr.io/rocker-org/devcontainer-features/quarto-cli:1": {
 			"version": "prerelease",
 			"installTinyTex": "true",

.github/.devcontainer/quarto-computing-dependencies/devcontainer-feature.json

@@ -0,0 +1,26 @@
+{
+  "id": "quarto-computing-dependencies",
+  "version": "1.0.0",
+  "name": "Install Computing Dependencies for Quarto",
+  "description": "Install R, Python, and Julia dependencies for Quarto.",
+  "options": {
+    "dependencies": {
+      "type": "string",
+      "enum": ["all", "r", "python", "julia"],
+      "default": "all",
+      "description": "Specify what dependencies to install."
+    }
+  },
+  "dependsOn": {
+    "ghcr.io/devcontainers/features/common-utils": {},
+    "ghcr.io/rocker-org/devcontainer-features/r-rig": {},
+    "ghcr.io/devcontainers/features/python": {},
+    "ghcr.io/julialang/devcontainer-features/julia": {}
+  },
+  "installsAfter": [
+		"ghcr.io/devcontainers/features/common-utils",
+    "ghcr.io/rocker-org/devcontainer-features/r-rig",
+    "ghcr.io/devcontainers/features/python",
+    "ghcr.io/julialang/devcontainer-features/julia"
+	]
+}

.github/.devcontainer/quarto-computing-dependencies/install.sh

@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+
+set -e
+
+export DEBIAN_FRONTEND=noninteractive
+
+DEPENDENCIES=${DEPENDENCIES:-"all"}
+
+USERNAME=${USERNAME:-${_REMOTE_USER:-"automatic"}}
+
+set -e
+
+if [ "$(id -u)" -ne 0 ]; then
+  echo -e 'Script must be run as root. Use sudo, su, or add "USER root" to your Dockerfile before running this script.'
+  exit 1
+fi
+
+# Determine the appropriate non-root user
+if [ "${USERNAME}" = "auto" ] || [ "${USERNAME}" = "automatic" ]; then
+  USERNAME=""
+  POSSIBLE_USERS=("vscode" "node" "codespace" "$(awk -v val=1000 -F ":" '$3==val{print $1}' /etc/passwd)")
+  for CURRENT_USER in "${POSSIBLE_USERS[@]}"; do
+    if id -u "${CURRENT_USER}" >/dev/null 2>&1; then
+      USERNAME=${CURRENT_USER}
+      break
+    fi
+  done
+  if [ "${USERNAME}" = "" ]; then
+    USERNAME=root
+  fi
+elif [ "${USERNAME}" = "none" ] || ! id -u "${USERNAME}" >/dev/null 2>&1; then
+  USERNAME=root
+fi
+
+quarto_r_deps() {
+  su "${USERNAME}" -c "Rscript -e 'pak::pkg_install(\"rmarkdown\")'"
+}
+
+quarto_python_deps() {
+  su "${USERNAME}" -c "python3 -m pip install jupyter"
+}
+
+quarto_julia_deps() {
+  su "${USERNAME}" -c "~/.juliaup/bin/julia -e 'using Pkg; Pkg.add(\"IJulia\")'"
+}
+
+case ${DEPENDENCIES} in
+  all)
+    quarto_r_deps
+    quarto_python_deps
+    quarto_julia_deps
+    ;;
+  r)
+    quarto_r_deps
+    ;;
+  python)
+    quarto_python_deps
+    ;;
+  julia)
+    quarto_julia_deps
+    ;;
+esac