added setup/install_powershell_ubuntu.sh

setup/install_powershell_ubuntu.sh

@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+#  vim:ts=4:sts=4:sw=4:et
+#
+#  Author: Hari Sekhon
+#  Date: 2020-03-09 22:38:36 +0000 (Mon, 09 Mar 2020)
+#
+#  https://github.com/harisekhon/bash-tools
+#
+#  License: see accompanying Hari Sekhon LICENSE file
+#
+#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
+#
+#  https://www.linkedin.com/in/harisekhon
+#
+
+# Installs PowerShell on Ubuntu
+#
+# https://docs.microsoft.com/en-us/powershell/scripting/install/installing-powershell-core-on-linux
+
+set -euo pipefail
+[ -n "${DEBUG:-}" ] && set -x
+srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# shellcheck disable=SC1090
+. "$srcdir/../lib/utils.sh"
+
+if type -P pwsh &>/dev/null; then
+    echo "PowerShell is already installed"
+    exit 0
+fi
+
+if ! grep -q '^DISTRIB_ID=Ubuntu' /etc/*release; then
+    echo "Not Ubuntu"
+    exit 1
+fi
+
+# Ubuntu 16.04 and 18.04 - 18.10 onwards use Snap, will require updates
+# 16.04 works, 18.04 has broken package dependency
+if grep -E '^DISTRIB_RELEASE=(19|18\.10)' /etc/*release; then
+    # assigned in lib
+    # shellcheck disable=SC2154
+    $sudo snap install powershell --classic
+else
+    version="$(awk -F= '/^DISTRIB_RELEASE=/{print $2}' /etc/*release)"
+    $sudo apt-get update
+    $sudo apt-get install -y wget apt-transport-https
+    wget -q "https://packages.microsoft.com/config/ubuntu/$version/packages-microsoft-prod.deb"
+    $sudo dpkg -i packages-microsoft-prod.deb
+    $sudo apt-get update
+    $sudo apt-get install -y powershell
+fi