getgo.sh

#!/bin/sh
ver=$1
plat=$(uname -s)
plat=${plat,,}
arch=$(uname -m)
arch=${arch,,}
case $arch in
"i686")
arch="386"
;;
"x86_64")
arch="amd64"
;;
esac
echo $plat, $arch

setupbashrc() {
  sed -i "/GOROOT/d" ~/.bashrc
  sed -i "/GOPATH/d" ~/.bashrc
  echo "export GOPATH=/gohome" >> ~/.bashrc
  echo "export GOROOT=/opt/go${ver}" >> ~/.bashrc
  echo "export PATH=\$GOPATH/bin:\$GOROOT/bin:\$PATH" >> ~/.bashrc
}

cd /tmp
test -d ./go && rm -rf ./go

wget "https://dl.google.com/go/go${ver}.${plat}-${arch}.tar.gz" -O ./go.tar.gz && \
tar -zxf ./go.tar.gz && \
mv ./go /opt/go${ver} && \
setupbashrc