65 lines
1.7 KiB
Go
65 lines
1.7 KiB
Go
package oci
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import (
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"context"
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"fmt"
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"github.com/google/go-containerregistry/pkg/name"
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v1 "github.com/google/go-containerregistry/pkg/v1"
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"github.com/google/go-containerregistry/pkg/v1/remote"
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)
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// ensure RegistryImageDetailsResolver implements ImageDetailsResolver.
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var _ ImageDetailsResolver = &RegistryImageDetailsResolver{}
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type RegistryImageDetailsResolver struct {
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*ImageSpec
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descriptor *v1.Descriptor
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}
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func NewRegistryImageDetailsResolver(src *ImageSpec) (*RegistryImageDetailsResolver, error) {
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return &RegistryImageDetailsResolver{
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ImageSpec: src,
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}, nil
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}
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func (r *RegistryImageDetailsResolver) ImageName(_ context.Context) (string, error) {
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return r.Identifier, nil
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}
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func (r *RegistryImageDetailsResolver) ImagePlatform(_ context.Context) (*v1.Platform, error) {
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return r.Platform, nil
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}
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func (r *RegistryImageDetailsResolver) ImageDescriptor(ctx context.Context) (*v1.Descriptor, error) {
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if r.descriptor == nil {
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subjectRef, err := name.ParseReference(r.Identifier)
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if err != nil {
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return nil, fmt.Errorf("failed to parse reference: %w", err)
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}
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options := WithOptions(ctx, r.Platform)
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image, err := remote.Image(subjectRef, options...)
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if err != nil {
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return nil, fmt.Errorf("failed to get image manifest: %w", err)
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}
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digest, err := image.Digest()
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if err != nil {
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return nil, fmt.Errorf("failed to get image digest: %w", err)
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}
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size, err := image.Size()
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if err != nil {
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return nil, fmt.Errorf("failed to get image size: %w", err)
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}
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mediaType, err := image.MediaType()
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if err != nil {
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return nil, fmt.Errorf("failed to get image media type: %w", err)
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}
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r.descriptor = &v1.Descriptor{
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Digest: digest,
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Size: size,
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MediaType: mediaType,
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}
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}
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return r.descriptor, nil
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}
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