#!/bin/bash
#-------------------------------------------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
#-------------------------------------------------------------------------------------------------------------
#
# Docs: https://github.com/devcontainers/features/tree/main/src/dotnet
# Maintainer: The VS Code and Codespaces Teams

DOTNET_VERSION="${VERSION:-'latest'}"
DOTNET_ADDITIONAL_VERSIONS="${ADDITIONALVERSIONS:-''}"
DOTNET_RUNTIME_ONLY="${RUNTIMEONLY:-'false'}"
DOTNET_INSTALL_DIR='/usr/local/dotnet/current'

set -e

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
}

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

# icu-devtools includes dependencies for .NET
check_packages wget ca-certificates icu-devtools

installer_script="/tmp/dotnet-install.sh"
wget -O "$installer_script" https://dot.net/v1/dotnet-install.sh

chmod +x "$installer_script"

# TODO: Install the version specified by DOTNET_VERSION option
"$installer_script" --install-dir "$DOTNET_INSTALL_DIR"

# TODO: Install additional versions

rm "$installer_script"

echo "Done!"