Method Unpack

client/image.go:301–385

(ctx context.Context, snapshotterName string, opts ...UnpackOpt)

}

func (i *image) Unpack(ctx context.Context, snapshotterName string, opts ...UnpackOpt) error {
	ctx, done, err := i.client.WithLease(ctx)
	if err != nil {
		return err
	}
	defer done(ctx)

	var config UnpackConfig
	for _, o := range opts {
		if err := o(ctx, &config); err != nil {
			return err
		}
	}

	manifest, err := i.getManifest(ctx, i.platform)
	if err != nil {
		return err
	}

	layers, err := i.getLayers(ctx, manifest)
	if err != nil {
		return err
	}

	var (
		a  = i.client.DiffService()
		cs = i.client.ContentStore()

		chain    []digest.Digest
		unpacked bool
	)
	snapshotterName, err = i.client.resolveSnapshotterName(ctx, snapshotterName)
	if err != nil {
		return err
	}
	sn, err := i.client.getSnapshotter(ctx, snapshotterName)
	if err != nil {
		return err
	}

	if err := i.checkSnapshotterSupport(ctx, snapshotterName, manifest,
		config.CheckPlatformSupported); err != nil {
		return err
	}

	for _, layer := range layers {
		unpacked, err = rootfs.ApplyLayerWithOpts(ctx, layer, chain, sn, a, config.SnapshotOpts, config.ApplyOpts)
		if err != nil {
			return fmt.Errorf("apply layer error for %q: %w", i.Name(), err)
		}

		if unpacked {
			// Set the uncompressed label after the uncompressed
			// digest has been verified through apply.
			cinfo := content.Info{
				Digest: layer.Blob.Digest,
				Labels: map[string]string{
					labels.LabelUncompressed: layer.Diff.Digest.String(),