Why is sealing not supported for sparse writable layers?

[gorbak25]

I wonder whether this may be done or there is a fundamental limitation.

[BigVan]

In theory, 'close_seal' method can be implemented in LSMTSparseFile.
And people should commit the sealed sparse layer before uploading it to the registry. // When we use buildkit to create overlaybd image, there will be similar processing

The relevant code will be released later.

[BigVan]

#217

[gorbak25]

Thank you!