Class: StackMaster::Config

Inherits:
Object
  • Object
show all
Defined in:
lib/stack_master/config.rb

Constant Summary collapse

ConfigParseError = 
Class.new(StandardError)

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config, base_dir) ⇒ Config

Returns a new instance of Config.

Raises:



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# File 'lib/stack_master/config.rb', line 41

def initialize(config, base_dir)
  @config = config
  @base_dir = base_dir
  @template_dir = config.fetch('template_dir', nil)
  @parameters_dir = config.fetch('parameters_dir', nil)
  @stack_defaults = config.fetch('stack_defaults', {})
  @region_aliases = Utils.underscore_keys_to_hyphen(config.fetch('region_aliases', {}))
  @region_to_aliases = @region_aliases.inject({}) do |hash, (key, value)|
    hash[value] ||= []
    hash[value] << key
    hash
  end
  @region_defaults = normalise_region_defaults(config.fetch('region_defaults', {}))
  @stacks = []

  raise ConfigParseError.new("Stack defaults can't be undefined") if @stack_defaults.nil?

  load_template_compilers(config)
  load_config
end

Instance Attribute Details

#base_dir ⇒ Object

Returns the value of attribute base_dir.



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# File 'lib/stack_master/config.rb', line 17

def base_dir
  @base_dir
end

#parameters_dir ⇒ Object

Returns the value of attribute parameters_dir.



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# File 'lib/stack_master/config.rb', line 17

def parameters_dir
  @parameters_dir
end

#region_aliases ⇒ Object

Returns the value of attribute region_aliases.



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# File 'lib/stack_master/config.rb', line 17

def region_aliases
  @region_aliases
end

#region_defaults ⇒ Object

Returns the value of attribute region_defaults.



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# File 'lib/stack_master/config.rb', line 17

def region_defaults
  @region_defaults
end

#stack_defaults ⇒ Object

Returns the value of attribute stack_defaults.



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# File 'lib/stack_master/config.rb', line 17

def stack_defaults
  @stack_defaults
end

#stacks ⇒ Object

Returns the value of attribute stacks.



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# File 'lib/stack_master/config.rb', line 17

def stacks
  @stacks
end

#template_compilers ⇒ Object

Returns the value of attribute template_compilers.



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# File 'lib/stack_master/config.rb', line 17

def template_compilers
  @template_compilers
end

#template_dir ⇒ Object

Returns the value of attribute template_dir.



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# File 'lib/stack_master/config.rb', line 17

def template_dir
  @template_dir
end

Class Method Details

.load!(config_file = 'stack_master.yml') ⇒ Object 



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# File 'lib/stack_master/config.rb', line 8

def self.load!(config_file = 'stack_master.yml')
  resolved_config_file = search_up_and_chdir(config_file)
  config = YAML.load(File.read(resolved_config_file))
  base_dir = File.dirname(File.expand_path(resolved_config_file))
  new(config, base_dir)
rescue Psych::SyntaxError => error
  raise ConfigParseError, "Unable to parse #{resolved_config_file}: #{error}"
end

.search_up_and_chdir(config_file) ⇒ Object 



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# File 'lib/stack_master/config.rb', line 28

def self.search_up_and_chdir(config_file)
  return config_file unless File.dirname(config_file) == "."

  dir = Dir.pwd
  parent_dir = File.expand_path("..", Dir.pwd)
  while parent_dir != dir && !File.exist?(File.join(dir, config_file))
    dir = parent_dir
    parent_dir = File.expand_path("..", dir)
  end

  File.join(dir, config_file)
end

Instance Method Details

#filter(region = nil, stack_name = nil) ⇒ Object 



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# File 'lib/stack_master/config.rb', line 62

def filter(region = nil, stack_name = nil)
  @stacks.select do |s|
    (region.blank? || s.region == region || s.region == region.gsub('_', '-')) &&
      (stack_name.blank? || s.stack_name == stack_name || s.stack_name == stack_name.gsub('_', '-'))
  end
end

#find_stack(region, stack_name) ⇒ Object 



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# File 'lib/stack_master/config.rb', line 69

def find_stack(region, stack_name)
  filter(region, stack_name).first
end

#unalias_region(region) ⇒ Object 



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# File 'lib/stack_master/config.rb', line 73

def unalias_region(region)
  @region_aliases.fetch(region) { region }
end