Wait until a particular condition is satisfied.Show details from next link. https://docs.aws.amazon.com/ja_jp/cli/latest/reference/s3api/wait.html
| aws s3api wait object-exists --bucket my-bucket --key path/to/my/key --if-modified-since |
| No way to wait for an s3 key to be updated 揃 Issue #1933 揃 aws/aws-cli 揃 GitHub : http://github.com/aws/aws-cli/issues/1933 |