GoLang Latest Installer

go-update.sh

#!/bin/bash

# check that root is running
if [ "${EUID}" -ne 0 ]; then
        echo "This script needs to be run as root. Exiting..."
        exit 1
fi

# get current version of go
current=$(go version | cut -d' ' -f3)

# get latest version filename from go.dev
filename=$(curl -sSL 'https://go.dev/dl/?mode=json' \
        | jq '.[0]' \
        | grep filename \
        | grep linux-amd64 \
        | cut -d'"' -f4)

# format latest version filename to get version only
target=$(echo ${filename} | sed -E 's/(.+)\.linux.*/\1/')

# check if latest version is already installed
if [ "${current}" = "${target}" ]; then
        echo "Latest version already installed"
        exit 0
fi

# move to tmp and download the latest release
cd /tmp && wget https://go.dev/dl/${filename}

# remove existing and install latest version (code from go.dev website)
rm -rf /usr/local/go \
        && tar -C /usr/local -xzf ${filename} \
        && echo "Successfully installed ${target}"