git-annex/Remote/Web.hs
Joey Hess 451171b7c1
clean up url removal presence update
* rmurl: Fix a case where removing the last url left git-annex thinking
  content was still present in the web special remote.
* SETURLPRESENT, SETURIPRESENT, SETURLMISSING, and SETURIMISSING
  used to update the presence information of the external special remote
  that called them; this was not documented behavior and is no longer done.

Done by making setUrlPresent and setUrlMissing only update presence info
for the web, and only when the url is a web url. See the comment for
reasoning about why that's the right thing to do.

In AddUrl, had to make it update location tracking, to handle the
non-web-url case.

This commit was sponsored by Ewen McNeill on Patreon.
2018-10-04 17:35:49 -04:00

133 lines
3.6 KiB
Haskell

{- Web remote.
-
- Copyright 2011 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Remote.Web (remote, getWebUrls) where
import Annex.Common
import Types.Remote
import Remote.Helper.Messages
import Remote.Helper.Export
import qualified Git
import qualified Git.Construct
import Annex.Content
import Config.Cost
import Config
import Logs.Web
import Annex.UUID
import Messages.Progress
import Utility.Metered
import qualified Annex.Url as Url
import Annex.YoutubeDl
remote :: RemoteType
remote = RemoteType
{ typename = "web"
, enumerate = list
, generate = gen
, setup = error "not supported"
, exportSupported = exportUnsupported
}
-- There is only one web remote, and it always exists.
-- (If the web should cease to exist, remove this module and redistribute
-- a new release to the survivors by carrier pigeon.)
list :: Bool -> Annex [Git.Repo]
list _autoinit = do
r <- liftIO $ Git.Construct.remoteNamed "web" (pure Git.Construct.fromUnknown)
return [r]
gen :: Git.Repo -> UUID -> RemoteConfig -> RemoteGitConfig -> Annex (Maybe Remote)
gen r _ c gc = do
cst <- remoteCost gc expensiveRemoteCost
return $ Just Remote
{ uuid = webUUID
, cost = cst
, name = Git.repoDescribe r
, storeKey = uploadKey
, retrieveKeyFile = downloadKey
, retrieveKeyFileCheap = downloadKeyCheap
-- HttpManagerRestricted is used here, so this is
-- secure.
, retrievalSecurityPolicy = RetrievalAllKeysSecure
, removeKey = dropKey
, lockContent = Nothing
, checkPresent = checkKey
, checkPresentCheap = False
, exportActions = exportUnsupported
, whereisKey = Nothing
, remoteFsck = Nothing
, repairRepo = Nothing
, config = c
, gitconfig = gc
, localpath = Nothing
, getRepo = return r
, readonly = True
, appendonly = False
, availability = GloballyAvailable
, remotetype = remote
, mkUnavailable = return Nothing
, getInfo = return []
, claimUrl = Nothing -- implicitly claims all urls
, checkUrl = Nothing
}
downloadKey :: Key -> AssociatedFile -> FilePath -> MeterUpdate -> Annex (Bool, Verification)
downloadKey key _af dest p = unVerified $ get =<< getWebUrls key
where
get [] = do
warning "no known url"
return False
get urls = untilTrue urls $ \u -> do
let (u', downloader) = getDownloader u
case downloader of
YoutubeDownloader -> do
showOutput
youtubeDlTo key u' dest
_ -> metered (Just p) key (pure Nothing) $ \_ p' ->
downloadUrl key p' [u'] dest
downloadKeyCheap :: Key -> AssociatedFile -> FilePath -> Annex Bool
downloadKeyCheap _ _ _ = return False
uploadKey :: Key -> AssociatedFile -> MeterUpdate -> Annex Bool
uploadKey _ _ _ = do
warning "upload to web not supported"
return False
dropKey :: Key -> Annex Bool
dropKey k = do
mapM_ (setUrlMissing k) =<< getWebUrls k
return True
checkKey :: Key -> Annex Bool
checkKey key = do
us <- getWebUrls key
if null us
then return False
else either giveup return =<< checkKey' key us
checkKey' :: Key -> [URLString] -> Annex (Either String Bool)
checkKey' key us = firsthit us (Right False) $ \u -> do
let (u', downloader) = getDownloader u
showChecking u'
case downloader of
YoutubeDownloader -> youtubeDlCheck u'
_ -> do
Url.withUrlOptions $ liftIO . catchMsgIO .
Url.checkBoth u' (keySize key)
where
firsthit [] miss _ = return miss
firsthit (u:rest) _ a = do
r <- a u
case r of
Right True -> return r
_ -> firsthit rest r a
getWebUrls :: Key -> Annex [URLString]
getWebUrls key = filter supported <$> getUrls key
where
supported u = snd (getDownloader u)
`elem` [WebDownloader, YoutubeDownloader]