Switch between go version using https://github.com/golang/dl

switchgo.sh

function switchgo() {
  version=$1
  if [ -z $version ]; then
    echo "Usage: switchgo [version]"
    return
  fi

  if ! command -v "go$version" > /dev/null 2>&1; then
    echo "version does not exist, download with: "
    echo "  go get golang.org/dl/go${version}"
    echo "  go${version} download"
    return
  fi

  go_bin_path=$(command -v "go$version")
  ln -sf "$go_bin_path" "$GOBIN/go"
  echo "Switched to ${go_bin_path}"
}

@fatih thanks for sharing this, that's very helpful. I had to do some minor changes to make it work:

if ! command -v "go$version" > /dev/null 2>&1; then
    echo "version does not exist, download with: "
    go get golang.org/dl/${version}
    ${version} download
    return
  fi

Sharing just in case others find the same issue.

Thanks for the tip @abstractj. Note that the download link is fixed, it should be now golang.org/dl/go${version}" not go get golang.org/dl/${version}".

I explicitly didn't run them because I sometimes write something wrong and didn't wanted it to download automatically, such as switchgo 1.14.

@fatih cool and thanks for that. Keep sharing, I learn a lot from you :)