class ConfLoader

Helps to load conf files in salemove ecosystem

Constants

EnvironmentNotFoundError
VERSION
ValueNotDefinedError

Public Class Methods

load(path, env) click to toggle source

Load given conf file

@path [String] path

full path to conf

@path [String] env

environment to load

@return [Hash]

hash with symbolized keys

@api public

# File lib/conf_loader.rb, line 22
def self.load(path, env)
  template = ERB.new File.new(path).read
  environments = YAML.load template.result(binding)

  if environments.has_key?(env)
    hash = environments[env]

    check_value_presence(
      guarantee_key_presence(Symbolizer.symbolize(hash))
    )
  else
    raise EnvironmentNotFoundError,
      "Configuration for `#{env}` not found at path #{path}"
  end
end

Private Class Methods

check_value_presence(hash) click to toggle source

# File lib/conf_loader.rb, line 48
def self.check_value_presence(hash)
  error_keys = check_values_not_empty(hash)
  if error_keys.empty?
    hash
  else
    raise ValueNotDefinedError, "Undefined keys: #{error_keys.join(', ')}"
  end
end

check_values_not_empty(hash) click to toggle source

# File lib/conf_loader.rb, line 57
def self.check_values_not_empty(hash)
  hash.inject([]) do |acc, (key, value)|
    errors =
      if value.is_a?(Hash)
        check_values_not_empty(value).map { |child_key| "#{key}.#{child_key}" }
      elsif value.to_s.empty?
        [key]
      else
        []
      end
    acc + errors
  end
end

guarantee_key_presence(hash) click to toggle source

# File lib/conf_loader.rb, line 41
def self.guarantee_key_presence(hash)
  hash.default_proc = proc do |h, k|
    raise KeyError, "#{k} not defined"
  end
  hash
end