Failed to push or attach annotation file

[FeynmanZhou]

Hi team,

I would like to use ORAS 0.15.1 to attach or push an annotation file test.json to an artifact:

cat test.json
{
"name":"John"
"name":"Bob"
}

But I failed to attach or push it and got the following error info:

oras push --annotation-file test.json localhost:5000/hello:latest
Error: json: cannot unmarshal string into Go value of type map[string]map[string]string

oras attach --artifact-type doc/example --annotation-file test.json feynmanacr.azurecr.io/sample/hello-world:latest test.json
Error: json: cannot unmarshal string into Go value of type map[string]map[string]string

Is any requirements or prerequisites I missed?

[qweeah]

The format of manifest annotation file test.json is not right, the right format is displayed as below:

{
  ...
  "<filename>": {
    "<annotation_key>": "annotation_value"
  }
}

where <filename> can be $manifest, $config or name of any to-be-uploaded files.

For example, if you need to add "name":"John" to pushed manifest, then test.json should be like:

{"$manifest":{"name":"John"}}

Detailed doc: https://oras.land/cli/4_manifest_annotations/