Class: Engineyard::Local::Middleware::Cookbooks

Inherits:
Object
  • Object
show all
Extended by:
Helpers::Executable
Includes:
Helpers::Executable, Helpers::Rvm
Defined in:
lib/engineyard-local/middleware/cookbooks.rb

Constant Summary collapse

DATA_EXPIRATION = 
600
COOKBOOK_VERSION_FILE = 
"/etc/chef/ey_local_cookbook_version"

Instance Method Summary collapse

Methods included from Helpers::Executable

project_dir, ssh_exec, ssh_exec!

Methods included from Helpers::Rvm

#bash_rvm_setup, #export_ruby, #ruby_env_const, #rvm_env, #use_ruby_with_gemset

Constructor Details

#initialize(app, env, *args) ⇒ Cookbooks

Returns a new instance of Cookbooks.



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# File 'lib/engineyard-local/middleware/cookbooks.rb', line 20

def initialize(app, env, *args)
  @app = app
  @env = env
  @args = args
end

Instance Method Details

#cached_data_path ⇒ Object 



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# File 'lib/engineyard-local/middleware/cookbooks.rb', line 26

def cached_data_path
  "#{@env[:root_path]}/.ey_local_data"
end

#call(env) ⇒ Object 



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# File 'lib/engineyard-local/middleware/cookbooks.rb', line 30

def call(env)
  cmd,response = @args

  if File.exist?(cached_data_path)
    ey_local_data = YAML.load(File.read(cached_data_path))
  else
    ey_local_data = {
      :installed_cookbook_version => {
        :data => nil,
        :as_of => Time.at(1)
      },
      :la_brea_data => {
        :changelog => nil,
        :cookbooks_url => nil,
        :cookbooks_version => nil,
        :created_at => nil,
        :updated_at => nil,
        :uuid => nil,
        :as_of => Time.at(1)
      }
    }
  end
  
  case cmd
  when :get_installed_version
    get_installed_cookbook_version(ey_local_data)
    response << ey_local_data[:installed_cookbook_version][:data]

  when :get_la_brea_data
    get_la_brea_data(ey_local_data)
    response << ey_local_data[:la_brea_data]

  when :update_cookbooks
    get_la_brea_data(ey_local_data)

    ssh_exec!(@env, update_cookbook_commands(
      ey_local_data[:la_brea_data][:cookbooks_url],
      ey_local_data[:la_brea_data][:cookbooks_version]))
    get_installed_cookbook_version(ey_local_data, true)
  end

  @app.call(env)
end

#cookbook_query_commands ⇒ Object 



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# File 'lib/engineyard-local/middleware/cookbooks.rb', line 14

def cookbook_query_commands
  [
    "cat #{COOKBOOK_VERSION_FILE}"
  ]
end

#get_installed_cookbook_version(ey_local_data, force = false) ⇒ Object 



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# File 'lib/engineyard-local/middleware/cookbooks.rb', line 74

def get_installed_cookbook_version(ey_local_data, force = false)
  if ( force || ( Time.now > ( ey_local_data[:installed_cookbook_version][:as_of] + DATA_EXPIRATION ) ) )
    cmd_output = ssh_exec(@env, cookbook_query_commands, {:error_check => false})
    ey_local_data[:installed_cookbook_version][:data] = cmd_output[:stdout] ? cmd_output[:stdout].join.chomp : nil
    ey_local_data[:installed_cookbook_version][:as_of] = Time.now
    write_cached_data(ey_local_data)
  end
end

#get_la_brea_data(ey_local_data) ⇒ Object 



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# File 'lib/engineyard-local/middleware/cookbooks.rb', line 83

def get_la_brea_data(ey_local_data)
  if ( Time.now > ( ey_local_data[:la_brea_data][:as_of] + DATA_EXPIRATION ) )
    r = YAML.load(open("http://#{Engineyard::Local.config[:la_brea_bridge]}/stack")) rescue nil
    if r
      r[:as_of] = Time.now
      ey_local_data[:la_brea_data] = r
      write_cached_data(ey_local_data)
    end
  end
end

#update_cookbook_commands(cookbook_uri, cookbook_version) ⇒ Object 



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# File 'lib/engineyard-local/middleware/cookbooks.rb', line 98

def update_cookbook_commands(cookbook_uri, cookbook_version)
  rvm_env +
  [
    "curl -s #{cookbook_uri} > /tmp/_chef.tgz",
    "sudo mkdir -p /etc/chef/recipes && cd /etc/chef/recipes && sudo tar -xzf /tmp/_chef.tgz",
    "if (( ! $? )); then sudo chown \`whoami\` #{COOKBOOK_VERSION_FILE}; echo \"#{cookbook_version}\" > #{COOKBOOK_VERSION_FILE}; fi",
    "rm /tmp/_chef.tgz"
  ]
end

#write_cached_data(ey_local_data) ⇒ Object 



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# File 'lib/engineyard-local/middleware/cookbooks.rb', line 94

def write_cached_data(ey_local_data)
  File.open(cached_data_path, "w+") {|fh| fh.write YAML.dump(ey_local_data)}
end