A shell script for switching Go versions.

switchgo.sh

#!/bin/sh

set -e

if [[ $# -ne 1 ]]; then
	echo "Usage: switchgo version" >&2
	exit 2
fi
if [[ -z "$GOBIN" ]]; then
	echo "\$GOBIN is not set" >&2
	exit 2
fi

if ! command -v $GOBIN/go$1 &> /dev/null; then
	echo "Go $1 doesn't exist, start downloading..."
	if [[ $(go version | cut -d " " -f 3 | cut -d . -f 2) -ge 17 ]]; then
		go install golang.org/dl/go$1@latest
	else
		go get golang.org/dl/go$1
	fi
	$GOBIN/go$1 download
fi

ln -sf $(command -v $GOBIN/go$1) $GOBIN/go
echo "Switched to Go $1"

记录一下 需要设置环境变量
export GOBIN=$HOME/bin
export PATH=$GOBIN:$PATH