vscode-dev-containers/script-library/powershell-debian.sh

#!/usr/bin/env 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/microsoft/vscode-dev-containers/blob/main/script-library/docs/powershell.md
# Maintainer: The VS Code and Codespaces Teams
#
# Syntax: ./powershell-debian.sh

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

export DEBIAN_FRONTEND=noninteractive

# Install curl, apt-transport-https, or gpg if missing
if ! dpkg -s apt-transport-https curl ca-certificates gnupg2 > /dev/null 2>&1 || ! type gpg > /dev/null 2>&1; then
    if [ ! -d "/var/lib/apt/lists" ] || [ "$(ls /var/lib/apt/lists/ | wc -l)" = "0" ]; then
        apt-get update
    fi
    apt-get -y install --no-install-recommends apt-transport-https curl ca-certificates gnupg2 
fi

ARCHITECTURE="$(uname -m)"
if [ "${ARCHITECTURE}" != "amd64" ] && [ "${ARCHITECTURE}" != "x86_64" ]; then
    echo "(!) Architecture $ARCHITECTURE unsupported"
    exit 1
fi

# Source /etc/os-release to get OS info
. /etc/os-release
# Import key safely (new 'signed-by' method rather than deprecated apt-key approach) and install
curl -sSL https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor > /usr/share/keyrings/microsoft-archive-keyring.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/microsoft-archive-keyring.gpg] https://packages.microsoft.com/repos/microsoft-${ID}-${VERSION_CODENAME}-prod ${VERSION_CODENAME} main" > /etc/apt/sources.list.d/microsoft.list
apt-get update -yq
apt-get install -yq powershell
echo "Done!"