PowerShell installer Script for Linux - to make installation/upgrade easier

install-pwsh.sh

#!/bin/bash

usage() {
    echo "Usage: $0 <version> # version example: 7.4.0-preview.3" >&2;
}

if [ "$1x" = "x" ]; then
    usage;
    echo "No version supplied - using default" >&2;
    VERSION="7.4.0-preview.3";
else
    VERSION="$1";
fi;

DOWNLOAD_URL="https://github.com/PowerShell/PowerShell/releases/download/v${VERSION}/powershell-${VERSION}-linux-x64.tar.gz";
OUTPUT_FOLDER="${HOME}/pwsh/pwsh-${VERSION}";
LINK_FOLDER="${HOME}/pwsh/current";

if [ -e "${OUTPUT_FOLDER}" ]; then
    echo "Folder ${OUTPUT_FOLDER} already exists. Not installing." >&2;
else
    echo "Using version ${VERSION}";
    mkdir -p "${OUTPUT_FOLDER}";
    cd "${OUTPUT_FOLDER}";
    curl -L "${DOWNLOAD_URL}" | tar -xzv;
fi;

echo "Creating symlink to ${OUTPUT_FOLDER} at ${LINK_FOLDER}" >&2;
ln -sf "${OUTPUT_FOLDER}" "${LINK_FOLDER}";