On Sun, 9 Aug 2009, Jerome Baum wrote: > > How difficult would it be to allow users to choose a hash function > during git-init which is then globally used in the repo? Are there > many changes needed or are changes in git-hash-object and git-init > sufficient? If youlimit the hash size to 20 bytes, there are almost no changes necessary. You'd need to hijack the 'SHA1_Init/SHA1_Update/SHA1_Final' functions, of course, and you'd likely want to rename them (and eventually a lot of other functions too), but that renaming is mechanical and isn't even needed for proper working. Now, if you would ever want to extend the _size_ of the hash, that's a much much bigger problem, but if you're ok with just changing the hash and then truncating the result to 20 bytes (ie kind of like sha-512-160), or you're ok with limiting yourself to 20-byte hashes like REIPMD-160, the size of the changes should be minimal. Linus -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html