Switch Go Versions

switch-go.sh

#!/usr/bin/env bash
set -eo pipefail
IFS=$'\n\t'

GREEN='\033[32;1m'
RED='\033[91;1m'
RESET='\033[0m'

function colecho {
	echo -e "${2}${1}${RESET}"
}

function usage() {
	cat <<- EOF
	Switch between go version 1.17 and 1.18
	$0  <1.17 | 1.18> 
	EOF
}

[[ $(whoami) != root ]] && { colecho "Run as root user or using sudo." "${RED}"; usage; exit 1; }
[[ -z $1 ]] && { colecho "Parameter required: 1.17 or 1.18." "${RED}"; usage; exit 2; }
set -u

case "$1" in
	"1.17" )
		colecho "1.17" "${GREEN}"
		ln -sf /usr/lib/go-1.17/bin/go /usr/bin/go
		ln -sf /usr/lib/go-1.17/bin/gofmt /usr/bin/gofmt
		;;
	"1.18" )
		colecho "1.18" "${GREEN}"
		ln -sf /usr/lib/go-1.18/bin/go /usr/bin/go
		ln -sf /usr/lib/go-1.18/bin/gofmt /usr/bin/gofmt
		;;
	* )
		colecho "Unrecognized option" "${RED}"
		usage
		;;
esac

colecho "Version: $(go version)" "${GREEN}"

Requires go versions to be added under /usr/lib, e.g:

/usr/lib                                                                                                
├── go -> /usr/lib/go-1.18                                                                                             
├── go-1.17                                                                                                            
├── go-1.18