Function Commit

pkg/imgutil/commit/commit.go:80–234

(ctx context.Context, client *containerd.Client, container containerd.Container, opts *Opts, globalOptions types.GlobalCommandOptions)

)

func Commit(ctx context.Context, client *containerd.Client, container containerd.Container, opts *Opts, globalOptions types.GlobalCommandOptions) (digest.Digest, error) {
	// Get labels
	containerLabels, err := container.Labels(ctx)
	if err != nil {
		return emptyDigest, err
	}

	// Get datastore
	dataStore, err := clientutil.DataStore(globalOptions.DataRoot, globalOptions.Address)
	if err != nil {
		return emptyDigest, err
	}

	// Ensure we do have a stateDir label
	stateDir := containerLabels[labels.StateDir]
	if stateDir == "" {
		stateDir, err = containerutil.ContainerStateDirPath(globalOptions.Namespace, dataStore, container.ID())
		if err != nil {
			return emptyDigest, err
		}
	}

	lf, err := containerutil.Lock(stateDir)
	if err != nil {
		return emptyDigest, err
	}
	defer lf.Release()

	id := container.ID()
	info, err := container.Info(ctx)
	if err != nil {
		return emptyDigest, err
	}

	// NOTE: Moby uses provided rootfs to run container. It doesn't support
	// to commit container created by moby.
	baseImgWithoutPlatform, err := client.ImageService().Get(ctx, info.Image)
	if err != nil {
		return emptyDigest, fmt.Errorf("container %q lacks image (wasn't created by nerdctl?): %w", id, err)
	}
	platformLabel := info.Labels[labels.Platform]
	if platformLabel == "" {
		platformLabel = platforms.DefaultString()
		log.G(ctx).Warnf("Image lacks label %q, assuming the platform to be %q", labels.Platform, platformLabel)
	}
	ocispecPlatform, err := platforms.Parse(platformLabel)
	if err != nil {
		return emptyDigest, err
	}
	log.G(ctx).Debugf("ocispecPlatform=%q", platforms.Format(ocispecPlatform))
	platformMC := platforms.Only(ocispecPlatform)
	baseImg := containerd.NewImageWithPlatform(client, baseImgWithoutPlatform, platformMC)

	baseImgConfig, _, err := imgutil.ReadImageConfig(ctx, baseImg)
	if err != nil {
		return emptyDigest, err
	}