How to create a separate index for each git commit and allow browsing code as of old commits

[mbautin]

If the entire index is being rebuilt for every commit and then atomically switched, is it possible, instead of throwing old indexes away, save N latest indexes to allow people to browse code as of a particular commit within that range?

[erikrose]

There's technically no reason you couldn't do it, though you'd chew up a lot of space very quickly. ES indices are BIG due to all the different ways Lucene likes to index things.

[mbautin]

So currently if we wanted to do this, what would be the recommended way? Creating a separate tree for each commit, and maintaining a config file listing all the trees which could be used with dxr serve?

[erikrose]

I suppose, though that sounds like a pain in the neck. I'd make some code changes if you were really interested.