Class: Kafo::Configuration

Inherits:
Object
  • Object
show all
Defined in:
lib/kafo/configuration.rb

Constant Summary collapse

DEFAULT = 
{
    :name                 => '',
    :description          => '',
    :log_dir              => '/var/log/kafo',
    :log_name             => 'configuration.log',
    :log_level            => 'info',
    :no_prefix            => false,
    :mapping              => {},
    :answer_file          => './config/answers.yaml',
    :installer_dir        => '.',
    :module_dirs          => ['./modules'],
    :default_values_dir   => '/tmp',
    :colors               => Kafo::ColorScheme.colors_possible?,
    :color_of_background  => :dark,
    :hook_dirs            => [],
    :custom               => {},
    :low_priority_modules => [],
    :verbose_log_level    => 'info'
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file, persist = true) ⇒ Configuration

Returns a new instance of Configuration.



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# File 'lib/kafo/configuration.rb', line 32

def initialize(file, persist = true)
  @config_file = file
  @persist     = persist
  configure_application
  @logger = KafoConfigure.logger

  @answer_file = app[:answer_file]
  begin
    @data = load_yaml_file(@answer_file)
  rescue Errno::ENOENT => e
    puts "No answer file at #{@answer_file} found, can not continue"
    KafoConfigure.exit(:no_answer_file)
  end

  @config_dir = File.dirname(@config_file)
end

Instance Attribute Details

#answer_file ⇒ Object (readonly)

Returns the value of attribute answer_file.



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# File 'lib/kafo/configuration.rb', line 10

def answer_file
  @answer_file
end

#config_file ⇒ Object (readonly)

Returns the value of attribute config_file.



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# File 'lib/kafo/configuration.rb', line 10

def config_file
  @config_file
end

Instance Method Details

#[](key) ⇒ Object

if a value is a true we return empty hash because we have no specific options for a particular puppet module



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# File 'lib/kafo/configuration.rb', line 159

def [](key)
  value = @data[key]
  value.is_a?(Hash) ? value : {}
end

#add_mapping(module_name, mapping) ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 118

def add_mapping(module_name, mapping)
  app[:mapping][module_name] = mapping
  save_configuration(app)
end

#add_module(name) ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 110

def add_module(name)
  mod = PuppetModule.new(name, KafoParsers::PuppetModuleParser, self).parse
  unless modules.map(&:name).include?(mod.name)
    mod.enable
    @modules << mod
  end
end

#answers ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 239

def answers
  @data
end

#app ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 62

def app
  @app ||= begin
    begin
      configuration = load_yaml_file(@config_file)
    rescue => e
      configuration = {}
    end

    result            = DEFAULT.merge(configuration || {})
    result[:password] ||= PasswordManager.new.password
    result[:module_dirs] = result[:modules_dir] || result[:module_dirs]
    result.delete(:modules_dir)
    result
  end
end

#check_dirs ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 94

def check_dirs
  [app[:check_dirs] || File.join(root_dir, 'checks')].flatten
end

#config_header ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 169

def config_header
  files          = [app[:config_header_file], File.join(gem_root, '/config/config_header.txt')].compact
  file           = files.select { |f| File.exists?(f) }.first
  @config_header ||= file.nil? ? '' : File.read(file)
end

#configure_application ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 56

def configure_application
  result = app
  save_configuration(result)
  result
end

#gem_root ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 102

def gem_root
  File.join(File.dirname(__FILE__), '../../')
end

#get_custom(key) ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 78

def get_custom(key)
  custom_storage[key.to_sym]
end

#kafo_modules_dir ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 106

def kafo_modules_dir
  app[:kafo_modules_dir] || (gem_root + '/modules')
end

#log_exists? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kafo/configuration.rb', line 235

def log_exists?
  File.exists?(log_file) && File.size(log_file) > 0
end

#log_file ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 231

def log_file
  File.join(app[:log_dir], app[:log_name])
end

#migrate_configuration(from_config, options = {}) ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 123

def migrate_configuration(from_config, options={})
  keys_to_skip = options.fetch(:skip, [])
  keys = [:log_dir, :log_name, :log_level, :no_prefix, :default_values_dir,
    :colors, :color_of_background, :custom, :password, :verbose_log_level]
  keys += options.fetch(:with, [])
  keys.each do |key|
    next if keys_to_skip.include?(key)
    app[key] = from_config.app[key]
  end
  save_configuration(app)
end

#migrations_dir ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 255

def migrations_dir
  @config_file.gsub(/\.yaml$/, '.migrations')
end

#module_dirs ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 98

def module_dirs
  [app[:module_dirs] || (app[:installer_dir] + '/modules')].flatten.map { |dir| File.expand_path(dir) }
end

#module_enabled?(mod) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kafo/configuration.rb', line 164

def module_enabled?(mod)
  value = @data[mod.is_a?(String) ? mod : mod.identifier]
  !!value || value.is_a?(Hash)
end

#modules ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 86

def modules
  @modules ||= @data.keys.map { |mod| PuppetModule.new(mod, KafoParsers::PuppetModuleParser, self).parse }.sort
end

#param(mod, name) ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 186

def param(mod, name)
  params.detect { |p| p.name == name && p.module.name == mod }
end

#params ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 182

def params
  @params ||= modules.map(&:params).flatten
end

#params_changed(old_config) ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 210

def params_changed(old_config)
  # finds params that had different value in the old config
  params.select do |par|
    next unless par.module.enabled?
    old_param = old_config.param(par.module.class_name, par.name)
    old_param && old_param.value != par.value
  end
end

#params_default_values ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 135

def params_default_values
  @params_default_values ||= begin
    @logger.debug "Creating tmp dir within #{app[:default_values_dir]}..."
    temp_dir = Dir.mktmpdir(nil, app[:default_values_dir])
    KafoConfigure.exit_handler.register_cleanup_path temp_dir
    @logger.info 'Loading default values from puppet modules...'
    command = PuppetCommand.new("$temp_dir=\"#{temp_dir}\" #{includes} dump_values(#{params_to_dump})", ['--noop'], self).append('2>&1').command
    result = `#{command}`
    @logger.debug result
    unless $?.exitstatus == 0
      log = app[:log_dir] + '/' + app[:log_name]
      puts "Could not get default values, check log file at #{log} for more information"
      @logger.error command
      @logger.error result
      @logger.error 'Could not get default values, cannot continue'
      KafoConfigure.exit(:defaults_error)
    end
    @logger.info "... finished"
    load_yaml_file(File.join(temp_dir, 'default_values.yaml'))
  end
end

#params_missing(old_config) ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 219

def params_missing(old_config)
  # finds params that are present but will be missing in the new config
  old_config.params.select do |par|
    next if !par.module.enabled? || !module_enabled?(par.module.name)
    param(par.module.class_name, par.name).nil?
  end
end

#preset_defaults_from_other_config(other_config) ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 204

def preset_defaults_from_other_config(other_config)
  params_changed(other_config).each do |par|
    param(par.module.class_name, par.name).value = other_config.param(par.module.class_name, par.name).value
  end
end

#preset_defaults_from_puppet ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 190

def preset_defaults_from_puppet
  # set values based on default_values
  params.each do |param|
    param.set_default(params_default_values)
  end
end

#preset_defaults_from_yaml ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 197

def preset_defaults_from_yaml
  # set values based on YAML
  params.each do |param|
    param.set_value_by_config(self)
  end
end

#root_dir ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 90

def root_dir
  File.expand_path(app[:installer_dir])
end

#run_migrations ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 243

def run_migrations
  migrations = Kafo::Migrations.new(migrations_dir)
  @app, @data = migrations.run(app, answers)
  if migrations.migrations.count > 0
    @modules = nil # force the lazy loaded modules to reload next time they are used
    save_configuration(app)
    store(answers)
    migrations.store_applied
    @logger.info("#{migrations.migrations.count} migration/s were applied. Updated configuration was saved.")
  end
end

#save_configuration(configuration) ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 49

def save_configuration(configuration)
  return true unless @persist
  FileUtils.touch @config_file
  File.chmod 0600, @config_file
  File.open(@config_file, 'w') { |file| file.write(format(YAML.dump(configuration))) }
end

#set_custom(key, value) ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 82

def set_custom(key, value)
  custom_storage[key.to_sym] = value
end

#store(data, file = nil) ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 175

def store(data, file = nil)
  filename = file || answer_file
  FileUtils.touch filename
  File.chmod 0600, filename
  File.open(filename, 'w') { |file| file.write(config_header + format(YAML.dump(data))) }
end

#temp_config_file ⇒ Object 



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# File 'lib/kafo/configuration.rb', line 227

def temp_config_file
  @temp_config_file ||= "/tmp/kafo_answers_#{rand(1_000_000)}.yaml"
end