[MERGE] [BUG 363837] Catch _win32_delete_readonly failure to remove file or directory and try to recover

[Aaron Bentley]

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Maritza Mendez wrote:
> The more I think about this, the more I think that a cure may be worse
> than the problem.  So I am leaning toward...

> bzr would catch the exception, print a polite message
> about the external misbehavior, and just keep going.

I think that this would be fine, so long as it's an opt-in behaviour.
If you do it as an onerror callback, note that problems may cascade,
because failure to delete a file can cause failure to delete its
containing directory.

Aaron
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