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** [tickets:#8042] Better handing of tmp dirs during merge**
**Status:** open
**Milestone:** unreleased
**Labels:** stability
**Created:** Thu Jan 07, 2016 10:54 PM UTC by Dave Brondsema
**Last Updated:** Thu Jan 07, 2016 10:54 PM UTC
**Owner:** nobody
Doing a one-click merge of a very large repo can potentially cause problems if
the working dir is bigger than the tmp dir mount supports.
* `def merge` can use a try/finally so that `shutil.rmtree` always runs even if
the clone fails (e.g. out of disk space)
* see if its possible to a shared clone (see also `_shared_clone`) so the
object files don't have to get copied, reducing disk usage and execution time.
It'd be nice if we could set a max size limit and check that in `can_merge` or
`merge_allowed` but it doesn't seem to be a way to check the size of a working
copy ahead of time. There is `git count-objects -vH` but that's just the repo
size, not the working copy.
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