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# File 'lib/aws-sdk-s3/plugins/iad_regional_endpoint.rb', line 21
def self.resolve_iad_regional_endpoint(cfg)
default_mode_value =
if cfg.respond_to?(:defaults_mode_config_resolver)
cfg.defaults_mode_config_resolver.resolve(:s3_us_east_1_regional_endpoint)
end
mode = ENV['AWS_S3_US_EAST_1_REGIONAL_ENDPOINT'] ||
Aws.shared_config.s3_us_east_1_regional_endpoint(profile: cfg.profile) ||
default_mode_value ||
'legacy'
mode = mode.downcase
unless %w(legacy regional).include?(mode)
raise ArgumentError, "expected :s3_us_east_1_regional_endpoint or"\
" ENV['AWS_S3_US_EAST_1_REGIONAL_ENDPOINT'] to be `legacy` or"\
" `regional`."
end
mode
end
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