Feat/seamless snapshot

[liaoweiqiang-dao42]

Relevant Issue (if applicable)

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Details

Please describe the details of PullRequest.

Types of changes

What types of changes does your PullRequest introduce? Put an x in all the boxes that apply:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

Go over all the following points, and put an x in all the boxes that apply.

• I have updated the documentation accordingly.
• I have added tests to cover my changes.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 506 lines in your changes missing coverage. Please review.

Project coverage is 54.94%. Comparing base (e1dffec) to head (bfe4a5a).

Files with missing lines	Patch %	Lines
...ontrib/nydusify/pkg/committer/seamless_snapshot.go	0.00%	396 Missing ⚠️
contrib/nydusify/cmd/nydusify.go	0.00%	83 Missing ⚠️
contrib/nydusify/pkg/committer/commiter.go	0.00%	27 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1724      +/-   ##
==========================================
- Coverage   55.49%   54.94%   -0.56%     
==========================================
  Files         197      198       +1     
  Lines       53292    53796     +504     
  Branches    44624    44624              
==========================================
- Hits        29577    29560      -17     
- Misses      22245    22765     +520     
- Partials     1470     1471       +1     

Files with missing lines	Coverage Δ
contrib/nydusify/pkg/committer/commiter.go	0.00% <0.00%> (ø)
contrib/nydusify/cmd/nydusify.go	15.59% <0.00%> (-1.69%)	⬇️
...ontrib/nydusify/pkg/committer/seamless_snapshot.go	0.00% <0.00%> (ø)

... and 6 files with indirect coverage changes

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