Install xhyve driver for docker using macports

dockerXhyveDriverInstall.sh

# If you've installed docker toolbox stuff previously, not macports. Else, you can skip.
sh -c "$(curl -fsSl https://raw.githubusercontent.com/docker/toolbox/master/osx/uninstall.sh)"
sudo port install docker docker-machine docker-compose
sudo port install xhyve

# Install go, qcow-format for qcow2 disk image format
$ sudo port install go opam libev
$ export GO15VENDOREXPERIMENT=1
$ export GO111MODULE="auto"

# Fetch the driver source
$ go get -u -d github.com/zchee/docker-machine-driver-xhyve
$ cd ~/go/src/github.com/zchee/docker-machine-driver-xhyve

$ opam init --compiler=4.05.0
$ eval `opam config env`
$ opam install uri.3.1.0 qcow-format conf-libev

# Connect MacPorts version of libev.a
$ ln -s /opt/local/lib/libev.a /usr/local/lib/libev.a

# Install docker-machine-driver-xhyve binary into /usr/local/bin
$ make install

# docker-machine-driver-xhyve need root owner and uid
$ sudo chown root:wheel /usr/local/bin/docker-machine-driver-xhyve
$ sudo chmod u+s /usr/local/bin/docker-machine-driver-xhyve