Shell functions for managing golang multiple versions

go_version_manage_function.sh

####### GOLANG VERSION MANAGE FUNCTIONS ######
# ref: https://go.dev/doc/manage-install
function goinstall() {
	echo "Downloading go$1 ..."
	go install golang.org/dl/go$1@latest && go$1 download
}

function gouse() {
	gopath=$(go env GOPATH)
	if test -x ${gopath}/bin/go$1; then
		rm -f ${gopath}/bin/go
		echo "Relink go with go$1 ..."
		ln -s ${gopath}/bin/go$1 ${gopath}/bin/go
		echo "Done"
	else
		echo "Version $1 not installed"
	fi
}

function golist() {
	current=$(go version | awk '{print $3}' | cut -c3-)
	for v in $(ls $(go env GOPATH)/bin | grep -E 'go(\d.*)' | cut -c3-);
	do
		if [ $v = $current ]; then
			echo "$v (⇦ current)"
		else
			echo $v
		fi
	done
}

function gouninstall() {
	current=$(go version | awk '{print $3}' | cut -c3-)
	if [ $1 = $current ]; then
		echo "version $1 is actived, please change to another version first"
		return
	fi
	echo "Removing binary..."
	rm -f $(go env GOPATH)/bin/go$1
	echo "Removing sdk ..."
	rm -r ~/sdk/go$1
	echo "Done"
}