Feature Request: Consistency check

[lonevvolf]

Describe the feature

I have a large library with other 300k photos. During syncing, I occasionally got breaks in the process which resulted in having to force unlock. I have a concern that maybe some larger videos, etc. may not be transferred completely. It would be interesting to run a consistency check on all files to ensure they match the server versions. Is this done automatically in some way? Since I imagine this can take a long time with so many files, maybe it needs a dedicated command?

[steilerDev]

When syncing the library I am loading all local assets, by reading the files. This is done by looking at the creation time and size (not the content).

Apple provides 'checksum' field within the API, but I have yet to figure out how to calculate this checksum - this would provide a really reliable consistency check, unfortunately I'm out of ideas.

On the library lock errors: This is a very simple locking logic, that was implemented to make sure that two instances of the sync engine are not accessing the file system at the same time - if you are sure no other instance runs, it's safe to remove the lock manually.

[steilerDev]

I've created a separate issue (#354) to explain my proposal for a new library version that should resolve this issue. Would therefore love to get your feedback on there and going to close this issue for now. Please re-open if you don't think it is covered by this initiative.