Class: MiniHiera

Inherits:
Object
  • Object
show all
Defined in:
lib/mini_hiera.rb,
lib/mini_hiera/version.rb

Defined Under Namespace

Classes: Context

Constant Summary collapse

CircularReferenceError = 
Class.new(RuntimeError)
KeyNotFoundError = 
Class.new(RuntimeError)
CACHE = 
{}
TYPES = 
{
  "yaml" => Proc.new { |filename| cache(filename) { YAML.load(File.read(filename), filename) } },
  "json" => Proc.new { |filename| cache(filename) { JSON.load(File.read(filename), filename) } }
}
VERSION = 
"0.1.2"

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config, options = {}) ⇒ MiniHiera

Returns a new instance of MiniHiera.



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# File 'lib/mini_hiera.rb', line 16

def initialize(config, options={})
  @config = config
  @options = options
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/mini_hiera.rb', line 15

def config
  @config
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/mini_hiera.rb', line 15

def options
  @options
end

Class Method Details

.cache(filename) ⇒ Object 



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# File 'lib/mini_hiera.rb', line 108

def self.cache(filename)
  if CACHE.keys.include?(filename)
    CACHE[filename]
  else
    CACHE[filename] = yield
  end
end

Instance Method Details

#context(data = {}, options = {}) ⇒ Object 



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# File 'lib/mini_hiera.rb', line 129

def context(data={}, options={})
  Context.new(self, data, @options.deep_merge(options))
end

#load_path(path) ⇒ Object 



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# File 'lib/mini_hiera.rb', line 121

def load_path(path)
  TYPES.map { |s,proc| ["#{path}.#{s}", proc] }.find_value { |filename,proc| proc.call(filename, binding) if File.exist?(filename) }
end

#replace(string, dictionary) ⇒ Object 



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# File 'lib/mini_hiera.rb', line 100

def replace(string, dictionary)
  string.gsub(/\%\{([^}]+)\}/) do |match|
    dictionary.fetch($1, match)
  end
end

#resolve(data) ⇒ Object 



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# File 'lib/mini_hiera.rb', line 125

def resolve(data)
  [data] + @options[:hierarchy].map { |path| load_path(File.join(@config, replace(path, data))) }.compact
end