// return a slice of s3 tags associated with the given s3 bucket. Essentially
// s3.GetBucketTagging, except returns an empty slice instead of an error when
// there are no tags.
func getTagSetS3(s3conn *s3.S3, bucket string) ([]*s3.Tag, error) {
request := &s3.GetBucketTaggingInput{
Bucket: aws.String(bucket),
}
response, err := s3conn.GetBucketTagging(request)
if ec2err, ok := err.(awserr.Error); ok && ec2err.Code() == "NoSuchTagSet" {
// There is no tag set associated with the bucket.
return []*s3.Tag{}, nil
} else if err != nil {
return nil, err
}
return response.TagSet, nil
}