NewFromReader returns the new gcscli configuration struct from the contents of the reader.

DefaultCredentialsSource specifies that credentials should be detected.

NoneCredentialsSource specifies that credentials are explicitly empty and that the client should be restricted to a read-only scope.

ServiceAccountFileCredentialsSource specifies that a service account file included in json_key should be used for authentication.

ErrEmptyBucketName is returned when a bucket_name in the config is empty.

ErrEmptyServiceAccountFile is returned when json_key in the config is empty when StaticCredentialsSource is explicitly requested.

ErrWrongLengthEncryptionKey is returned when a non-nil encryption_key in the config is not exactly 32 bytes.

GCSCli represents the configuration for the gcscli.