This script downloads and installs a specific version of Go lang

update_go.sh

#!/usr/bin/env bash

# This script downloads and installs a specific version of Go.

# Check if the version is provided
if [ -z "$1" ]; then
  echo "Usage: ./update_go.sh version (example 1.20.4 or latest)"
  exit 1
fi

if [ "$1" == "latest" ]; then
  GO_VERSION=$(curl -L -s https://golang.org/VERSION?m=text | head -n 1)
else
  GO_VERSION=$1
  if [[ ! "$GO_VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
    echo "Invalid version number. Please provide a valid version number (example 1.20.4 or latest)."
    exit 1
  fi
  GO_VERSION="go${GO_VERSION}"
fi

GO_ARCHIVE="${GO_VERSION}.linux-amd64.tar.gz"
GO_DOWNLOAD_URL="https://go.dev/dl/${GO_ARCHIVE}"
TMP_DIR="/tmp"

# Download Go archive
echo "Downloading Go version ${GO_VERSION}..."

response=$(curl -L -s -w "%{http_code}" -o "${TMP_DIR}/${GO_ARCHIVE}" "${GO_DOWNLOAD_URL}")
if [ $response -ne 200 ]; then
  echo "Failed to download Go version ${GO_VERSION}. Please check the URL and try again."
  exit 1
fi

# Remove the previous Go installation
echo "Removing previous Go installation..."
sudo rm -rf /usr/local/go

# Extract the downloaded archive to /usr/local
echo "Installing Go version ${GO_VERSION}..."
sudo tar -C /usr/local -xzf "${TMP_DIR}/${GO_ARCHIVE}"

# Remove the downloaded archive
rm "${TMP_DIR}/${GO_ARCHIVE}"

echo "Set the go path in .bashrc"
echo 'export GOPATH="$HOME/go";export PATH="$PATH:/usr/local/go/bin:$GOPATH/bin"'