Method: Chef::ChefFS::ChefFSDataStore#create

Defined in:
lib/chef/chef_fs/chef_fs_data_store.rb

#create(path, name, data, *options) ⇒ Object

If you want to get the contents of /data/x/y from the server, you say chef_fs.child('data').child('x').child('y').read. It will make exactly one network request: GET /data/x/y And that will return 404 if it doesn't exist.

ChefFS objects do not go to the network until you ask them for data. This means you can construct a /data/x/y ChefFS entry early.

Alternative: chef_fs.child('data') could have done a GET /data preemptively, allowing it to know whether child('x') was valid (GET /data gives you a list of data bags). Then child('x') could have done a GET /data/x, allowing it to know whether child('y') (the item) existed. Finally, we would do the GET /data/x/y to read the contents. Three network requests instead of 1.



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# File 'lib/chef/chef_fs/chef_fs_data_store.rb', line 202

def create(path, name, data, *options)
  if use_memory_store?(path)
    @memory_store.create(path, name, data, *options)

  elsif path[0] == "cookbooks" && path.length == 2
  # Do nothing.  The entry gets created when the cookbook is created.

  # /policy_groups/GROUP/policies/NAME
  elsif path[0] == "policy_groups" && path[2] == "policies"
    # Just set or create the proper entry in the hash
    update_json(to_chef_fs_path(path[0..1]), {}, *options) do |group|
      if policies.key?(path[3])
        raise ChefZero::DataStore::DataAlreadyExistsError.new(path, group)
      end

      group["policies"] ||= {}
      group["policies"][path[3]] = { "revision_id" => Chef::JSONCompat.parse(data) }
      group
    end

  # create [/organizations/ORG]/users/NAME (with content '{}')
  # Manipulate the `members.json` file that contains a list of all users
  elsif is_org? && path == [ "users" ]
    update_json("members.json", [], *options) do |members|
      # Format of each entry: { "user": { "username": "jkeiser" } }
      if members.any? { |member| member["user"]["username"] == name }
        raise ChefZero::DataStore::DataAlreadyExistsError.new(path, entry)
      end

      # Actually add the user
      members << { "user" => { "username" => name } }
    end

  # create [/organizations/ORG]/association_requests/NAME (with content '{}')
  # Manipulate the `invitations.json` file that contains a list of all users
  elsif is_org? && path == [ "association_requests" ]
    update_json("invitations.json", [], *options) do |invitations|
      # Format of each entry: { "id" => "jkeiser-chef", 'username' => 'jkeiser' }
      if invitations.any? { |member| member["username"] == name }
        raise ChefZero::DataStore::DataAlreadyExistsError.new(path)
      end

      # Actually add the user (TODO insert org name??)
      invitations << { "username" => name }
    end

  else
    unless data.is_a?(String)
      raise "set only works with strings"
    end

    with_parent_dir(path + [name], *options) do |parent, name|

      parent.create_child(name, data)
    rescue Chef::ChefFS::FileSystem::AlreadyExistsError => e
      raise ChefZero::DataStore::DataAlreadyExistsError.new(to_zero_path(e.entry), e)

    end
  end
end