git-annex/Assistant/WebApp/MakeRemote.hs
Joey Hess 6c565ec905 external special remotes mostly implemented (untested)
This has not been tested at all. It compiles!

The only known missing things are support for encryption, and for get/set
of special remote configuration, and of key state. (The latter needs
separate work to add a new per-key log file to store that state.)

Only thing I don't much like is that initremote needs to be passed both
type=external and externaltype=foo. It would be better to have just
type=foo

Most of this is quite straightforward code, that largely wrote itself given
the types. The only tricky parts were:

* Need to lock the remote when using it to eg make a request, because
  in theory git-annex could have multiple threads that each try to use
  a remote at the same time. I don't think that git-annex ever does
  that currently, but better safe than sorry.

* Rather than starting up every external special remote program when
  git-annex starts, they are started only on demand, when first used.
  This will avoid slowdown, especially when running fast git-annex query
  commands. Once started, they keep running until git-annex stops, currently,
  which may not be ideal, but it's hard to know a better time to stop them.

* Bit of a chicken and egg problem with caching the cost of the remote,
  because setting annex-cost in the git config needs the remote to already
  be set up. Managed to finesse that.

This commit was sponsored by Lukas Anzinger.
2013-12-26 18:23:13 -04:00

37 lines
1.1 KiB
Haskell

{- git-annex assistant webapp making remotes
-
- Copyright 2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU AGPL version 3 or higher.
-}
module Assistant.WebApp.MakeRemote (
module Assistant.MakeRemote,
module Assistant.WebApp.MakeRemote
) where
import Assistant.Common
import Assistant.WebApp.Types
import Assistant.Sync
import qualified Remote
import qualified Types.Remote as Remote
import qualified Config
import Config.Cost
import Types.StandardGroups
import Git.Types (RemoteName)
import Logs.PreferredContent
import Assistant.MakeRemote
import Utility.Yesod
{- Runs an action that creates or enables a cloud remote,
- and finishes setting it up, then starts syncing with it,
- and finishes by displaying the page to edit it. -}
setupCloudRemote :: StandardGroup -> Maybe Cost -> Annex RemoteName -> Handler a
setupCloudRemote defaultgroup mcost maker = do
r <- liftAnnex $ addRemote maker
liftAnnex $ do
setStandardGroup (Remote.uuid r) defaultgroup
maybe noop (Config.setRemoteCost (Remote.repo r)) mcost
liftAssistant $ syncRemote r
redirect $ EditNewCloudRepositoryR $ Remote.uuid r