class Google::Auth::ServiceAccountCredentials

def self.make_creds options = {}

Parameters:
  • scope (string|array|nil) -- the scope(s) to access
  • json_key_io (IO) -- an IO from which the JSON key can be read 
def self.make_creds options = {}
  json_key_io, scope, enable_self_signed_jwt, target_audience, audience, token_credential_uri =
    options.values_at :json_key_io, :scope, :enable_self_signed_jwt, :target_audience,
                      :audience, :token_credential_uri
  raise ArgumentError, "Cannot specify both scope and target_audience" if scope && target_audience
  if json_key_io
    private_key, client_email, project_id, quota_project_id, universe_domain = read_json_key json_key_io
  else
    private_key = unescape ENV[CredentialsLoader::PRIVATE_KEY_VAR]
    client_email = ENV[CredentialsLoader::CLIENT_EMAIL_VAR]
    project_id = ENV[CredentialsLoader::PROJECT_ID_VAR]
    quota_project_id = nil
    universe_domain = nil
  end
  project_id ||= CredentialsLoader.load_gcloud_project_id
  new(token_credential_uri:   token_credential_uri || TOKEN_CRED_URI,
      audience:               audience || TOKEN_CRED_URI,
      scope:                  scope,
      enable_self_signed_jwt: enable_self_signed_jwt,
      target_audience:        target_audience,
      issuer:                 client_email,
      signing_key:            OpenSSL::PKey::RSA.new(private_key),
      project_id:             project_id,
      quota_project_id:       quota_project_id,
      universe_domain:        universe_domain || "googleapis.com")
    .configure_connection(options)
end