Fixed one howler of a bug today. Turns out that git annex fsck --all --from remote didn't actually check the content of the remote, but checked the local repository. Only --all was buggy; git annex fsck --from remote was ok. Don't think this is crash priority enough to make a release for, since only --all is affected.

Somewhat uncomfortably made git annex sync pass --allow-unrelated-histories to git merge. While I do think that git's recent refusal to merge unrelated histories is good in general, the problem is that initializing a direct mode repository involves making an empty commit. So merging from a remote into such a direct mode repository means merging unrelated histories, while an indirect mode repository doesn't. Seems best to avoid such inconsistencies, and the only way I could see to do it is to always use --allow-unrelated-histories. May revisit this once direct mode is finally removed.

Using the git-annex arm standalone bundle on some WD NAS boxes used to work, and then it seems they changed their kernel to use a nonstandard page size, and broke it. This actually seems to be a bug in the gold linker, which defaults to an unncessarily small page size on arm. The git-annex arm bundle is being adjusted to try to deal with this.

ghc 8 made error include some backtrace information. While it's really nice to have backtraces for unexpected exceptions in Haskell, it turns out that git-annex used error a lot with the intent of showing an error message to the user, and a backtrace clutters up such messages. So, bit the bullet and checked through every error in git-annex and made such ones not include a backtrace.

Also, I've been considering what protocol to use between git-annex nodes when communicating over tor. One way would be to make it very similar to git-annex-shell, using rsync etc, and possibly reusing code from git-annex-shell. However, it can take a while to make a connection across the tor network, and that method seems to need a new connection for each file transfered etc. Also thought about using a http based protocol. The servant library is great for that, you get both http client and server implementations almost for free. Resuming interrupted transfers might complicate it, and the hidden service side would need to listen on a unix socket, instead of the regular http port. It might be worth it to use http for tor, if it could be reused for git-annex http servers not on the tor network. But, then I'd have to make the http server support git pull and push over http in a way that's compatable with how git uses http, including authentication. Which is a whole nother ball of complexity. So, I'm leaning instead to using a simple custom protocol something like:

    > AUTH $localuuid $token
    < AUTH-SUCCESS $remoteuuid
    > SENDPACK $length
    > $gitdata
    < RECVPACK $length
    < $gitdata
    > GET $pos $key
    < DATA $length
    < $bytes
    > PUT $key
    < PUT-FROM $pos
    > DATA $length
    > $bytes

Today's work was sponsored by Riku Voipio.