MailMover.py crashes if mail was deleted

[J-N-K]

Running afew --move-mail crashes if one of the files in the notmuch database was previously deleted. This is due to the exception handling in Mailmover.py The shutil-Copy routine (l. 75) raises an exception if the file was not found and the exception-handler only takes care of "already exists" errors.

If the file was not found, it should be reported but not crash afew.

[flokli]

@GuillaumeSeren Can you check if #189 properly handles this? We should probably logger.warn, but then skip over that file.

[GuillaumeSeren]

Hello @Floki @J-N-K,
as the refactored version of the MailMover (still welcome feedback on this patch !! :beer),
is more iterative and do a process of moving on a mail centric way before we do the whole list at once.

I think this could fix, you issue, please test the MailMover and add your feedback.

[J-N-K]

I‘m not using afew any longer, so i can‘t test. Sorry.