WIP: add a new Feature for to install rstudio-server

src/rstudio-server/devcontainer-feature.json

@@ -0,0 +1,23 @@
+{
+	"name": "RStudio Server",
+	"id": "rstudio-server",
+	"version": "0.1.0",
+	"description": "Installs the RStudio Server, enables you to run the RStudio IDE.",
+	"documentationURL": "https://github.com/rocker-org/devcontainer-features/tree/main/src/rstudio-server",
+	"options": {
+		"version": {
+			"type": "string",
+			"proposals": [
+				"stable",
+				"daily"
+			],
+			"default": "stable",
+			"description": "Select version of the RStudio Server, if not stable."
+		}
+	},
+	"installsAfter": [
+		"ghcr.io/devcontainers/features/common-utils",
+		"ghcr.io/rocker-org/devcontainer-features/r-apt",
+		"ghcr.io/rocker-org/devcontainer-features/r-rig"
+	]
+}

src/rstudio-server/install.sh

@@ -0,0 +1,140 @@
+#!/usr/bin/env bash
+
+VERSION=${VERSION:-"stable"}
+
+USERNAME=${USERNAME:-${_REMOTE_USER:-"automatic"}}
+
+set -e
+
+# Clean up
+rm -rf /var/lib/apt/lists/*
+
+if [ "$(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
+
+architecture="$(dpkg --print-architecture)"
+if [ "${architecture}" != "amd64" ] && [ "${architecture}" != "arm64" ]; then
+    echo "(!) Architecture $architecture unsupported"
+    exit 1
+fi
+
+# Only supports Ubuntu
+# shellcheck source=/dev/null
+source /etc/os-release
+if [ "${ID}" != "ubuntu" ]; then
+    echo "(!) ${ID} is not supported"
+    exit 1
+fi
+
+# Determine the appropriate non-root user
+if [ "${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 "${USERNAME}" >/dev/null 2>&1; then
+    USERNAME=root
+fi
+
+apt_get_update() {
+    if [ "$(find /var/lib/apt/lists/* | wc -l)" = "0" ]; then
+        echo "Running apt-get update..."
+        apt-get update -y
+    fi
+}
+
+# Checks if packages are installed and installs them if not
+check_packages() {
+    if ! dpkg -s "$@" >/dev/null 2>&1; then
+        apt_get_update
+        apt-get -y install --no-install-recommends "$@"
+    fi
+}
+
+find_version_from_git_tags() {
+    local variable_name=$1
+    local requested_version=${!variable_name}
+    if [ "${requested_version}" = "none" ]; then return; fi
+    local repository=$2
+    local prefix=${3:-"tags/v"}
+    local separator=${4:-"."}
+    if [ "$(echo "${requested_version}" | grep -o "." | wc -l)" != "2" ]; then
+        local escaped_separator=${separator//./\\.}
+        local regex="${prefix}\\K[0-9]+${escaped_separator}[0-9]+${escaped_separator}[0-9]+\\+[0-9]+$"
+        local version_list
+        version_list="$(git ls-remote --tags "${repository}" | grep -oP "${regex}" | tr -d ' ' | tr "${separator}" "." | sort -rV)"
+        if [ "${requested_version}" = "latest" ] || [ "${requested_version}" = "current" ] || [ "${requested_version}" = "lts" ]; then
+            declare -g "${variable_name}"="$(echo "${version_list}" | head -n 1)"
+        else
+            set +e
+            declare -g "${variable_name}"="$(echo "${version_list}" | grep -E -m 1 "^${requested_version//./\\.}([\\.\\s]|$)")"
+            set -e
+        fi
+    fi
+    if [ -z "${!variable_name}" ] || ! echo "${version_list}" | grep "^${!variable_name//./\\.}$" >/dev/null 2>&1; then
+        echo -e "Invalid ${variable_name} value: ${requested_version}\nValid values:\n${version_list}" >&2
+        exit 1
+    fi
+    echo "${variable_name}=${!variable_name}"
+}
+
+check_r() {
+    if ! R --version >/dev/null 2>&1; then
+        check_packages r-base
+    fi
+}
+
+install_rstudio() {
+    local version=$1
+    local deb_file="rstudio-server.deb"
+    local architecture
+    architecture="$(dpkg --print-architecture)"
+
+    mkdir -p /tmp/rstudio-server
+    pushd /tmp/rstudio-server
+
+    if [[ "${version}" == "stable" ]] || [[ "${version}" == "preview" ]] || [[ "${version}" == "daily" ]]; then
+        curl -sLo "${deb_file}" "https://rstudio.org/download/latest/${version}/server/${UBUNTU_CODENAME}/rstudio-server-latest-${architecture}.deb"
+    else
+        curl -sLo "${deb_file}" "https://download2.rstudio.org/server/${UBUNTU_CODENAME}/${architecture}/rstudio-server-${VERSION/"+"/"-"}-${architecture}.deb" ||
+            curl -sLo "${deb_file}" "https://s3.amazonaws.com/rstudio-ide-build/server/${UBUNTU_CODENAME}/${architecture}/rstudio-server-${VERSION/"+"/"-"}-${architecture}.deb" ||
+            echo "(!) Version ${VERSION} not found" && exit 1
+    fi
+
+    gdebi "${deb_file}"
+    popd
+    rm -rf /tmp/rstudio-server
+}
+
+export DEBIAN_FRONTEND=noninteractive
+
+check_packages curl ca-certificates gdebi-core
+check_r
+
+# Soft version matching
+# If VERSION contains `daily` like `2023.09.0-daily+304`, the check will be skipped.
+if [[ "${VERSION}" == "stable" ]] || [[ "${VERSION}" == "preview" ]] || [[ "${VERSION}" == "*daily*" ]]; then
+    if [ ! -x "$(command -v git)" ]; then
+        check_packages git
+    fi
+    find_version_from_git_tags VERSION "https://github.com/rstudio/rstudio"
+fi
+
+# Install the RStudio Server
+echo "Downloading RStudio Server..."
+
+install_rstudio "${VERSION}"
+
+# Clean up
+rm -rf /var/lib/apt/lists/*
+
+echo "Done!"