Class: Amigrind::Config

Inherits:
Settingslogic
  • Object
show all
Extended by:
Amigrind::Core::Logging::Mixin
Includes:
Amigrind::Core::Logging::Mixin
Defined in:
lib/amigrind/config.rb

Overview

Config values we care about: ‘auto_profile` - boolean; if set

Constant Summary collapse

CREDENTIAL_TYPES = 
[ :default, :iam, :shared ].freeze

Instance Method Summary collapse

Instance Method Details

#aws_credentials(environment = nil) ⇒ Object 



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# File 'lib/amigrind/config.rb', line 39

def aws_credentials(environment = nil)
  # This is a minor disaster and should be refactored, but essentially boils down
  # to specifying a credentials_type and any related settings. If
  # `auto_profile_from_environment` is set, any time that an environment is
  # passed in, `auto_profile_prefix` will be prepended to the environment name
  # to generate the AWS profile name. This allows one to, for example, have
  # a 'foocorp_production' profile that will be automatically used when working
  # with the 'production' environment.
  aws = Config['aws'] || {}

  credential_type = (aws['credentials_type'] || :default).to_sym
  auto_profile_from_environment = !!aws['auto_profile_from_environment']
  auto_profile_prefix = aws['auto_profile_prefix'] || ''
  profile_name = aws['profile_name']

  debug_log "credentials_type: #{credential_type}"

  raise "setting error: can only use profile_name with credential_type = shared." \
    if credential_type != :shared && !profile_name.nil?

  raise "setting error: cannot use both profile_name and auto_profile_from_environment." \
    if !profile_name.nil? && auto_profile_from_environment

  case credential_type
  when :default
    debug_log 'Using default credentials.'
    nil
  when :shared
    if auto_profile_from_environment &&
        profile_name.nil? && !environment.nil?
      environment = environment.name \
        if (environment.is_a?(Amigrind::Environments::Environment))

      profile_name = "#{auto_profile_prefix}#{environment}"
      debug_log "auto_profile_from_environment enabled and environment " \
                "passed; setting profile_name to '#{profile_name}'."
    end

    p = (profile_name || 'default').strip

    debug_log "Using profile '#{p}'."
    Aws::SharedCredentials.new(profile_name: p)
  when :iam
    debug_log 'Using IAM credentials.'
    Aws::InstanceProfileCredentials.new
  else
    raise "invalid credential type '#{credential_type}' " \
          "(allowed: #{CREDENTIAL_TYPES.join(', ')})"
  end
end