dotcloud/docker

package specialimage

import (
    "github.com/containerd/platforms"
    "github.com/distribution/reference"
    "github.com/opencontainers/image-spec/specs-go"
    ocispec "github.com/opencontainers/image-spec/specs-go/v1"
)

func MultiPlatform(dir string, imageRef string, imagePlatforms []ocispec.Platform) (*ocispec.Index, []ocispec.Descriptor, error) {
    ref, err := reference.ParseNormalizedNamed(imageRef)
    if err != nil {
        return nil, nil, err
    }

    var descs []ocispec.Descriptor

    for _, platform := range imagePlatforms {
        ps := platforms.Format(platform)
        manifestDesc, err := oneLayerPlatformManifest(dir, platform, FileInLayer{Path: "bash", Content: []byte("layer-" + ps)})
        if err != nil {
            return nil, nil, err
        }
        descs = append(descs, manifestDesc)
    }

    idx, err := multiPlatformImage(dir, ref, ocispec.Index{
        Versioned: specs.Versioned{SchemaVersion: 2},
        MediaType: ocispec.MediaTypeImageIndex,
        Manifests: descs,
    })
    return idx, descs, err
}