Class: KnifeSharp::SharpRollback

Inherits:
Chef::Knife
  • Object
show all
Defined in:
lib/chef/knife/sharp-rollback.rb

Instance Method Summary collapse

Instance Method Details

#list_rollback_points ⇒ Object 



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# File 'lib/chef/knife/sharp-rollback.rb', line 94

def list_rollback_points()
  ui.msg("Available rollback points :")
  Dir.glob(File.join(@cfg["rollback"]["destination"], "*.json")).each do |f|
    ts = File.basename(f, ".json")
    ui.msg("  * #{ts} (#{Time.at(ts.to_i).to_s})")
  end
  exit 0
end

#rollback_to(identifier) ⇒ Object 



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# File 'lib/chef/knife/sharp-rollback.rb', line 103

def rollback_to(identifier)
  show_rollback_point(identifier)
  answer = ui.ask_question("Continue rollback ? Y/(N) ", :default => "N").upcase
  if answer != "Y"
    ui.msg("Aborting !")
    exit 0
  end

  begin
    fp = File.open(File.join(@cfg["rollback"]["destination"],"#{identifier}.json"),"r")
    infos = JSON.load(fp)
  rescue
    ui.error("could not load rollback point #{identifier}")
    exit 1
  end

  env = Chef::Environment.load(infos["environment"])
  infos["cookbook_versions"].each do |cb, version|
      env.cookbook_versions[cb] = version
      ui.msg("Setting #{cb} to version #{version}")
  end
  env.save
end

#run ⇒ Object 



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# File 'lib/chef/knife/sharp-rollback.rb', line 30

def run()
  setup()

  if config[:list]
    list_rollback_points()
    exit 0
  end

  if config[:show]
    identifier = name_args
    show_rollback_point(identifier)
    exit 0
  end

  if config[:to]
    identifier = name_args
    rollback_to(identifier)
    exit 0
  end
end

#setup ⇒ Object 



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# File 'lib/chef/knife/sharp-rollback.rb', line 51

def setup()
  actions = 0
  [:to, :list, :show].each do |action|
    if config[action]
      actions+=1
    end
  end

  if actions > 1
    ui.error("please specify only one action")
    exit 1
  end


  # Sharp config
  cfg_files = [ "/etc/sharp-config.yml", "~/.chef/sharp-config.yml" ]
  loaded = false
  cfg_files.each do |cfg_file|
    begin
      @cfg = YAML::load_file(File.expand_path(cfg_file))
      loaded = true
    rescue Exception => e
      ui.error "Error on loading config : #{e.inspect}" if config[:verbosity] > 0
    end
  end
  unless loaded == true
    ui.error "config could not be loaded ! Tried the following files : #{cfg_files.join(", ")}"
    exit 1
  end

  # Knife config
  if Chef::Knife.chef_config_dir && File.exists?(File.join(Chef::Knife.chef_config_dir, "knife.rb"))
    Chef::Config.from_file(File.join(Chef::Knife.chef_config_dir, "knife.rb"))
  else
    ui.error "Cannot find knife.rb config file"
    exit 1
  end

  chefcfg = Chef::Config
  @cb_path = chefcfg.cookbook_path.is_a?(Array) ? chefcfg.cookbook_path.first : chefcfg.cookbook_path
  @loader = Chef::CookbookLoader.new(@cb_path)
end

#show_rollback_point(identifier) ⇒ Object 



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# File 'lib/chef/knife/sharp-rollback.rb', line 127

def show_rollback_point(identifier)
  begin
    fp = File.open(File.join(@cfg["rollback"]["destination"],"#{identifier}.json"),"r")
  rescue
    ui.error("could not load rollback point #{identifier}")
    exit 1
  end
  infos = JSON.load(fp)
  ui.msg("Rollback point has the following informations :")
  ui.msg("  environment : #{infos["environment"]}")
  ui.msg("  cookbooks versions :")
  infos["cookbook_versions"].each do |cb, version|
    ui.msg("   * #{cb} => #{version}")
  end
end