Update golang with only one command. REQUIRED program "jq".

golang-update.sh

#!/bin/bash

LAST_VERSION_NUMBER=$(curl -s "https://go.dev/dl/?mode=json" | jq ".[0].version" | sed 's/"//g' | sed 's/go//')
DOWNLOAD_URL="https://go.dev/dl/go${LAST_VERSION_NUMBER}.linux-amd64.tar.gz"
BASE_DIR="/opt/go"
FOLDER_NAME="go-${LAST_VERSION_NUMBER}"
UNPACK_DST="${BASE_DIR}/${FOLDER_NAME}"

if [ -d "${UNPACK_DST}" ]; then
	echo "Already installed last version ${LAST_VERSION_NUMBER}!"
	exit 0
fi

echo "[*] Installing new Golang '${FOLDER_NAME}' from '${DOWNLOAD_URL}' to '${UNPACK_DST}'..."

set -e

echo "[1] Downloading new Golang version..."
if [ -d "/tmp/go" ]; then
	echo "[1.1] Cleaning old '/tmp/go'..."
	/bin/rm -r /tmp/go
fi

curl -L $DOWNLOAD_URL | tar xz -C /tmp
echo

echo "[2] Installing '${FOLDER_NAME}'..."
sudo mv /tmp/go $UNPACK_DST

echo "[3] Linking '${UNPACK_DST}' to '${BASE_DIR}/bin'"
sudo /bin/rm $BASE_DIR/bin
sudo ln -s ${UNPACK_DST}/bin ${BASE_DIR}/bin