ansible-instance

#!/usr/bin/env ruby
#
# Copyright 2016-2019 Victor Penso
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

begin
 
  # current working directory
  path = ENV['PWD']
  # name of the virtual machine instance 
  name = File.basename(path).split('.')[0]
  # get the network configuration
  null, ip, mac = `virsh-nat-bridge lookup #{name}`.split
  # target configuration file for Ansible
  config_file = "#{path}/ansible.ini"
  # Ansible configuration
  config = <<-EOF
    #{name} ansible_user=root ansible_host=#{ip} host_key_checking=no ansible_ssh_private_key_file=#{path}/keys/id_rsa
  EOF

  # Create a configuration file if missing
  unless File.exist? config_file
    File.open(config_file,'w') do |f|
      f.puts config.gsub(/^    /,'')
    end
    $stdout.puts "#{config_file} written."
  end

  $stdout.puts `ansible -i #{config_file} #{name} #{ARGV.join(' ')}`

rescue => exc
  $stderr.puts "ERROR: #{exc.message}"
  $stderr.puts " use -h for detailed instructions"
  if $options.debug
    $stderr.puts '-- Stack Trace --'
    $stderr.puts exc.backtrace
  else
    $stderr.puts 'You may want run this in debug mode with \'-d\''
  end
  exit 1
end

exit 0