drip_ssh_proxy.sh

#!/usr/bin/env bash
#
# drip_ssh_proxy.sh
#
# Attempts to pull private ip address from hostname pattern.
# assumes ruby is present on the system.

HOST_PORT="$1"
if [[ -z "$HOST_PORT" ]]; then
  >&2 echo "host:port is required"
  exit 1
fi

USER="${2:-app}"

CMD=$(
/usr/bin/env ruby <<EORUBY
host, port = "$HOST_PORT".split(":")
port = "22" unless port
re = /\Adrip-([a-z]+)-.+-(\d+)-(\d+)-(\d+)-(\d+)\Z/
m = host.match(re)

exit 1 unless m

env = m[1]
ip = m[2, 4].join(".")

proxy_ip = case env
when "production"
  "52.0.68.247"
when "staging"
  "34.202.212.120"
else
  STDERR.puts "Invalid env: #{env}"
  exit 1
end

puts "ssh $USER@#{proxy_ip} -W #{ip}:#{port}"
EORUBY
)

if [[ "$?" -ne "0" ]]; then
  >&2 echo "Error parsing host:port"
  exit 1
fi

$CMD