update-go.sh

#!/bin/bash

set -eu
LATEST=$(curl -fsL https://golang.org/VERSION?m=text)
LATEST=$(echo $LATEST | sed -r 's/go([0-9.]+) time.*\b/\1/')

echo "Latest version: $LATEST"
echo

VERSION=${VERSION:-$LATEST}
OS=${OS:-linux}
ARCH=${ARCH:-amd64}

echo Version: $VERSION
echo OS: $OS
echo Arch: $ARCH
echo

FILENAME=$VERSION.$OS-$ARCH
echo Downloading $FILENAME...
echo
curl https://dl.google.com/go/go$FILENAME.tar.gz -# -o /tmp/go.tar.gz

echo Uninstall old version...
echo
sudo rm -rf /usr/local/go/

echo Installing new version...
echo
sudo tar -C /usr/local -xzf /tmp/go.tar.gz

rm -rf /tmp/go.tar.gz

#export PATH=$PATH:/usr/local/go/bin
go version