Module: Pwnbus::Configdb

Defined in:
lib/pwnbus/configdb.rb,
lib/pwnbus/configdb/db.rb,
lib/pwnbus/configdb/files.rb

Overview

:nodoc: file-related functionality

Defined Under Namespace

Modules: Files Classes: Db

Class Method Summary collapse

Class Method Details

.open(name, options = {}) ⇒ Object

Opens a configuration database. The database is created if it doesn’t exist.

Args:

name:: the database name; if the name starts with a ., the database is
       only readable to the current user, otherwise it is public (readable
       to everyone, but only writable by the current user)
options:: the following keys are recognized
  :read:: opens the database only for reading

Yields a proxy object that can be used to access the database.

Returns the value produced by the block.

Example:

Pwnbus::Configdb.open('system') do |system|
  system.os.name = 'Ubuntu'
  system.os.version = '10.04.1'
end



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# File 'lib/pwnbus/configdb.rb', line 27

def self.open(name, options = {})
  db_path = Files.find_db(name) || Files.create_db(name, options)
  
  db_file = Files.open_db(db_path, options)
  db = Db.new db_file
  begin
    return_value = yield db.proxy
    if db.dirty?
      Files.write_db db_path, options do |wf|
        db.write wf
      end
    end
    return_value
  ensure
    db.close
    db_file.close
  end
end