Simple script to toggle between Go versions.

toggle-go-version.sh

#!/bin/bash

echo "Available go versions:"
result=$(ls -1 /usr/local/ | grep -i "go" | grep -v "^go$")
echo "$result" | nl

echo ""
printf "Which version shall it be: "

read -r num

echo ""
goversion=$(echo "$result" | sed "${num}q;d")

if [ -z $goversion ]; then
    echo "invalid input"
    exit 1
fi

sudo rm /usr/local/go
sudo ln -s "/usr/local/$goversion" /usr/local/go

go version