[Request]: Calculate/Include Full Size in JSON Output of images.

[theetherGit]

Feature or enhancement request details

Right now I'm not sure it should be a bug or request.

Currently, in json format we have descriptor details and there is no full image size in json format while in table format we have calculated full image size in size field.

• List images with verbose flag

container image ls -v

output:

• List images with json format

container image ls --format json

output:

[
  {
    "reference": "docker.io/library/alpine:latest",
    "descriptor": {
      "digest": "sha256:4b7ce07002c69e8f3d704a9c5d6fd3053be500b7f1c69fc0d80990c2ad8dd412",
      "mediaType": "application/vnd.oci.image.index.v1+json",
      "size": 9218
    }
  },
  {
    "reference": "docker.io/library/postgres:latest",
    "descriptor": {
      "digest": "sha256:41fc5342eefba6cc2ccda736aaf034bbbb7c3df0fdb81516eba1ba33f360162c",
      "mediaType": "application/vnd.oci.image.index.v1+json",
      "size": 10229
    }
  },
  {
    "reference": "ghcr.io/apple/containerization/vminit:0.8.1",
    "descriptor": {
      "mediaType": "application/vnd.oci.image.index.v1+json",
      "size": 306,
      "digest": "sha256:666991717c0d26a211b400b09ad45ac84a9f64af8a08c2c64a54884e76d98954"
    }
  },
  {
    "reference": "ghcr.io/apple/containerization/vminit:0.9.1",
    "descriptor": {
      "size": 306,
      "mediaType": "application/vnd.oci.image.index.v1+json",
      "digest": "sha256:6839bd6e230281df328571bd15929f8115303cba19737f3d888cc77a113e482d"
    }
  }
]

In json format, we get size from the descriptor instead of sum of sizes from descriptor , layers and manifest config.

Code reference for how size of image is calculated in table format: https://github.com/apple/container/blob/main/Sources/ContainerCommands/Image/ImageList.swift#L83-L84

Expected:
In json format of images we should have full image size:

{
    "reference": "ghcr.io/apple/containerization/vminit:0.9.1",
    "size": "172.5 MB"
    "descriptor": {
      "size": 306,
      "mediaType": "application/vnd.oci.image.index.v1+json",
      "digest": "sha256:6839bd6e230281df328571bd15929f8115303cba19737f3d888cc77a113e482d"
    },
  }

Docker cli do provide same size for image in table and json format.

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