In-memory repository

[kszucs]

Does libgit2 support in-memory stores? Any thoughts on embeddable databases like rocksdb or leveldb?

I'm calculating a lot of blames which seems io heavy (using ramdisk makes it an order of magnitude faster).

I can implement if someone would provide guidance.

[xmo-odoo]

@kszucs it doesn't look like there are any non-file backends still. #690 added support for custom backends, but it looks like you can only bridge libgit2 backends and it's unclear that this can be done without native code.

See also #76.

[jdavid]

With PR #942, #948 and #982 merged this should be feasible, though not yet released there's some documentation as well.
It would be nice to have such a backend, if only for demonstration purposes.