Second disk for Docker-for-Desktop

com.docker.hyperkit

#!/usr/bin/env ruby

newDiskName = "ZFS.raw"
newDiskSize = "20g"

args ||= []

diskArg = ""

ARGV.size.times do |idx|
  if ARGV[idx] =~ /Docker\.raw$/
    diskArg = ARGV[idx]
    diskPath = diskArg.split(",").last
    newDisk = diskPath.sub("Docker.raw",newDiskName)
    `truncate -s '#{newDiskSize}' '#{newDisk}'` unless File.exist?(newDisk)
    args << ARGV[idx].sub(diskPath,newDisk)
  else
    args << ARGV[idx]
  end
end

args << "-s"
args << "8" + diskArg[1..-1]
exec(__FILE__ + ".orig",*args)

setup.sh

#!sh
# move the original hyperkit binary to a known path:
BASE_PATH=/Applications/Docker.app/Contents/Resources/bin
mv ${BASE_PATH}/com.docker.hyperkit ${BASE_PATH}/com.docker.hyperkit.orig

# now place the wrapper
cat > ${BASE_PATH}/com.docker.hyperkit <<'EOF'
# contents of com.docker.hyperkit gist from https://gist.github.com/steigr/7bb7d6831bddcd4e463e79cfefb86fb4
EOF

# ... and make it executable
chmod 0755 ${BASE_PATH}/com.docker.hyperkit