remotes

// Use remotes.CreateResolver for creating your remotes.Resolver
resolver := createExampleResolver()
ref, err := reference.ParseNamed("my.registry/namespace/my-app:my-tag")
if err != nil {
	panic(err)
}

// Pull the CNAB and get the bundle
resultBundle, err := Pull(context.Background(), ref, resolver)
if err != nil {
	panic(err)
}

resultBundle.WriteTo(os.Stdout)

Output:

{
    "name": "my-app",
    "version": "0.1.0",
    "description": "description",
    "keywords": [
        "keyword1",
        "keyword2"
    ],
    "maintainers": [
        {
            "name": "docker",
            "email": "docker@docker.com",
            "url": "docker.com"
        }
    ],
    "invocationImages": [
        {
            "imageType": "docker",
            "image": "my.registry/namespace/my-app@sha256:d59a1aa7866258751a261bae525a1842c7ff0662d4f34a355d5f36826abc0341",
            "size": 506,
            "mediaType": "application/vnd.docker.distribution.manifest.v2+json"
        }
    ],
    "images": {
        "image-1": {
            "imageType": "oci",
            "image": "my.registry/namespace/my-app@sha256:d59a1aa7866258751a261bae525a1842c7ff0662d4f34a355d5f36826abc0341",
            "size": 507,
            "mediaType": "application/vnd.oci.image.manifest.v1+json",
            "description": "nginx:2.12"
        }
    },
    "actions": {
        "action-1": {
            "Modifies": true
        }
    },
    "parameters": {
        "param1": {
            "type": "type",
            "defaultValue": "hello",
            "allowedValues": [
                "value1",
                true,
                1
            ],
            "required": false,
            "metadata": {},
            "destination": {
                "path": "/some/path",
                "env": "env_var"
            }
        }
    },
    "credentials": {
        "cred-1": {
            "path": "/some/path",
            "env": "env-var"
        }
    }
}

resolver := createExampleResolver()
b := createExampleBundle()
ref, err := reference.ParseNamed("my.registry/namespace/my-app:my-tag")
if err != nil {
	panic(err)
}

// Push the bundle here
descriptor, err := Push(context.Background(), b, ref, resolver)
if err != nil {
	panic(err)
}

bytes, err := json.MarshalIndent(descriptor, "", "  ")
if err != nil {
	panic(err)
}

fmt.Printf("%s", string(bytes))

Output:

{
  "mediaType": "application/vnd.oci.image.index.v1+json",
  "digest": "sha256:780346d71e4a7ae4375e1b8c2dfced63ed6429d411667c4c0aa30e0a68b75c1e",
  "size": 1121
}