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Ruslan Kuprieiev
88660f6a66
All three of those use more or less the same logic for testing different link types and maybe then using them. So now instead of having 3 implementations, we'll have just one. Filesystem `transfer` now will not try to catch particular errno's, but instead will just ignore any OSError and move down to the next link type to try out, and if the last one fails - it will raise the last exception, so if it is a common problem - we'll be able to see it. This patch also removes `odb.confirmed_cache_type`, as it was caching link type that is not really a cache-level thing, but rather a checkout thing, that should only be cached for particular objects we are linking, as multiple objects could be linked to different filesystems from the same odb (e.g. external local output on hdd and local data on your ssd). Next step here will be to introduce metadata diff, so that we can get rid of temporary Link wrapper and introduce Transfer and corresponding transfer config, that will know what links to use and could have some other things like callbacks, so we don't continue passing dozens of kwargs along the stack. Continuing from #6963 Fixes #6980