Class: Rubber::Configuration::Environment

Inherits:
Object
  • Object
show all
Defined in:
lib/rubber/environment.rb

Overview

Contains the configuration defined in rubber.yml Handles selecting of correct config values based on the host/role passed into bind

Defined Under Namespace

Classes: BoundEnv, HashValueProxy

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config_root) ⇒ Environment

Returns a new instance of Environment.



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# File 'lib/rubber/environment.rb', line 15

def initialize(config_root)
  @config_root = config_root
  @config_files = ["#{@config_root}/rubber.yml"]
  @config_files += Dir["#{@config_root}/rubber-*.yml"].sort

  # add a config file for current env only so that you can override
  #things for specific envs
  @config_files -= Dir["#{@config_root}/rubber-*-env.yml"]
  env_yml = "#{@config_root}/rubber-#{Rubber.env}-env.yml"
  @config_files << env_yml if File.exist?(env_yml)
  
  @items = {}
  @config_files.each { |file| read_config(file) }
  @config_secret = bind().rubber_secret
  read_config(@config_secret) if @config_secret
end

Instance Attribute Details

#config_files ⇒ Object (readonly)

Returns the value of attribute config_files.



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# File 'lib/rubber/environment.rb', line 12

def config_files
  @config_files
end

#config_root ⇒ Object (readonly)

Returns the value of attribute config_root.



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# File 'lib/rubber/environment.rb', line 11

def config_root
  @config_root
end

#config_secret ⇒ Object (readonly)

Returns the value of attribute config_secret.



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# File 'lib/rubber/environment.rb', line 13

def config_secret
  @config_secret
end

Class Method Details

.combine(old, new) ⇒ Object

combine old and new into a single value: non-nil wins if other is nil arrays just get unioned hashes also get unioned, but the values of conflicting keys get combined All else, the new value wins



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# File 'lib/rubber/environment.rb', line 64

def self.combine(old, new)
  return old if new.nil?
  return new if old.nil?
  value = old
  if old.is_a?(Hash) && new.is_a?(Hash)
    value = old.clone
    new.each do |nk, nv|
      value[nk] = combine(value[nk], nv)
    end
  elsif old.is_a?(Array) && new.is_a?(Array)
    value = old | new
  else
    value = new
  end
  return value
end

Instance Method Details

#bind(roles = nil, host = nil) ⇒ Object 



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# File 'lib/rubber/environment.rb', line 55

def bind(roles = nil, host = nil)
  BoundEnv.new(@items, roles, host)
end

#current_full_host ⇒ Object 



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# File 'lib/rubber/environment.rb', line 51

def current_full_host
  Socket::gethostname
end

#current_host ⇒ Object 



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# File 'lib/rubber/environment.rb', line 47

def current_host
  Socket::gethostname.gsub(/\..*/, '')
end

#known_roles ⇒ Object 



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# File 'lib/rubber/environment.rb', line 39

def known_roles
  roles_dir = File.join(@config_root, "role")
  roles = Dir.entries(roles_dir)
  roles.delete_if {|d| d =~ /(^\..*)/}
  roles += @items['roles'].keys
  return roles.compact.uniq
end

#read_config(file) ⇒ Object 



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# File 'lib/rubber/environment.rb', line 32

def read_config(file)
  Rubber.logger.debug{"Reading rubber configuration from #{file}"}
  if File.exist?(file)
    @items = Environment.combine(@items, YAML.load_file(file) || {})
  end
end