Bash script for updating/installing Go on linux

install_go.sh

#!/bin/bash

GO_DOWNLOAD_URL=$1

if [ -z "$GO_DOWNLOAD_URL" ]; then
    echo 'URL to Go distributive must be provided'
    exit 1
fi

sudo true

echo "Downloading Go from $GO_DOWNLOAD_URL"

PREV_CWD=$(pwd)

ARCHIVE_NAME=${GO_DOWNLOAD_URL##*/}

cd /tmp
wget $GO_DOWNLOAD_URL
sudo tar -xvf $ARCHIVE_NAME
if [ -d /usr/local/go ]; then
    sudo rm -rf /usr/local/go
fi
sudo mv go /usr/local
sudo rm $ARCHIVE_NAME

echo "Done, current Go version: $(go version)"