avoid redundant prompt for http password in git-annex get that does autoinit

autoEnableSpecialRemotes runs a subprocess, and if the uuid for a git
remote has not been probed yet, that will do a http get that will prompt
for a password. And then the parent process will subsequently prompt
for a password when getting annexed files from the remote.

So the solution is for autoEnableSpecialRemotes to run remoteList before
the subprocess, which will probe for the uuid for the git remote in the
same process that will later be used to get annexed files.

But, Remote.Git imports Annex.Init, and Remote.List imports Remote.Git,
so Annex.Init cannot import Remote.List. Had to pass remoteList into
functions in Annex.Init to get around this dependency loop.

Annex/Init.hs

@@ -201,8 +201,8 @@ getInitializedVersion = do
  -
  - Checks repository version and handles upgrades too.
  -}
-ensureInitialized :: Annex ()
-ensureInitialized = getInitializedVersion >>= maybe needsinit checkUpgrade
+ensureInitialized :: Annex [Remote] -> Annex ()
+ensureInitialized remotelist = getInitializedVersion >>= maybe needsinit checkUpgrade
   where
 	needsinit = ifM autoInitializeAllowed
 		( do
@@ -210,7 +210,7 @@ ensureInitialized = getInitializedVersion >>= maybe needsinit checkUpgrade
 				Right () -> noop
 				Left e -> giveup $ show e ++ "\n" ++
 					"git-annex: automatic initialization failed due to above problems"
-			autoEnableSpecialRemotes
+			autoEnableSpecialRemotes remotelist
 		, giveup "First run: git-annex init"
 		)
 
@@ -254,13 +254,13 @@ guardSafeToUseRepo a = ifM (inRepo Git.Config.checkRepoConfigInaccessible)
  -
  - Checks repository version and handles upgrades too.
  -}
-autoInitialize :: Annex ()
-autoInitialize = getInitializedVersion >>= maybe needsinit checkUpgrade
+autoInitialize :: Annex [Remote] -> Annex ()
+autoInitialize remotelist = getInitializedVersion >>= maybe needsinit checkUpgrade
   where
 	needsinit =
 		whenM (initializeAllowed <&&> autoInitializeAllowed) $ do
 			initialize True Nothing Nothing
-			autoEnableSpecialRemotes
+			autoEnableSpecialRemotes remotelist
 
 {- Checks if a repository is initialized. Does not check version for ugrade. -}
 isInitialized :: Annex Bool
@@ -440,9 +440,17 @@ fixupUnusualReposAfterInit = do
 {- Try to enable any special remotes that are configured to do so.
  - 
  - The enabling is done in a child process to avoid it using stdio.
+ -
+ - The remotelist should be Remote.List.remoteList, which cannot
+ - be imported here due to a dependency loop.
  -}
-autoEnableSpecialRemotes :: Annex ()
-autoEnableSpecialRemotes = do
+autoEnableSpecialRemotes :: Annex [Remote] -> Annex ()
+autoEnableSpecialRemotes remotelist = do
+	-- Get all existing git remotes to probe for their uuid here,
+	-- so it is not done inside the child process. Doing it in there
+	-- could result in password prompts for http credentials,
+	-- which would then not end up cached in this process's state.
+	_ <- remotelist
 	rp <- fromRawFilePath <$> fromRepo Git.repoPath
 	withNullHandle $ \nullh -> gitAnnexChildProcess "init"
 		[ Param "--autoenable" ]

Command.hs

@@ -28,6 +28,7 @@ import Utility.Daemon
 import Types.Transfer
 import Types.ActionItem
 import Types.WorkerPool as ReExported
+import Remote.List
 
 {- Generates a normal Command -}
 command :: String -> CommandSection -> String -> CmdParamsDesc -> (CmdParamsDesc -> CommandParser) -> Command
@@ -125,7 +126,7 @@ commonChecks :: [CommandCheck]
 commonChecks = [repoExists]
 
 repoExists :: CommandCheck
-repoExists = CommandCheck 0 ensureInitialized
+repoExists = CommandCheck 0 (ensureInitialized remoteList)
 
 notBareRepo :: Command -> Command
 notBareRepo = addCheck checkNotBareRepo

Command/Assistant.hs

@@ -16,6 +16,7 @@ import Config.Files.AutoStart
 import qualified BuildInfo
 import Utility.HumanTime
 import Assistant.Install
+import Remote.List
 
 import Control.Concurrent.Async
 
@@ -62,7 +63,7 @@ start o
 		stop
 	| otherwise = do
 		liftIO ensureInstalled
-		ensureInitialized
+		ensureInitialized remoteList
 		Command.Watch.start True (daemonOptions o) (startDelayOption o)
 
 startNoRepo :: AssistantOptions -> IO ()

Remote/Git.hs

@@ -350,7 +350,7 @@ tryGitConfigRead autoinit r hasuuid
 	readlocalannexconfig = do
 		let check = do
 			Annex.BranchState.disableUpdate
-			catchNonAsync autoInitialize $ \e ->
+			catchNonAsync (autoInitialize (pure [])) $ \e ->
 				warning $ "remote " ++ Git.repoDescribe r ++
 					":"  ++ show e
 			Annex.getState Annex.repo
@@ -605,7 +605,7 @@ repairRemote r a = return $ do
 	s <- Annex.new r
 	Annex.eval s $ do
 		Annex.BranchState.disableUpdate
-		ensureInitialized
+		ensureInitialized (pure [])
 		a `finally` stopCoProcesses
 
 data LocalRemoteAnnex = LocalRemoteAnnex Git.Repo (MVar [(Annex.AnnexState, Annex.AnnexRead)])
@@ -647,7 +647,7 @@ onLocal' (LocalRemoteAnnex repo mv) a = liftIO (takeMVar mv) >>= \case
 	[] -> do
 		liftIO $ putMVar mv []
 		v <- newLocal repo
-		go (v, ensureInitialized >> a)
+		go (v, ensureInitialized (pure []) >> a)
 	(v:rest) -> do
 		liftIO $ putMVar mv rest
 		go (v, a)

doc/todo/not_ask_git_credentials_for_password_per_each_file.mdwn

@@ -31,3 +31,5 @@ and wondered if such excessive prompting could be avoided without engaging `git`
 
 [[!meta author=yoh]]
 [[!tag projects/repronim]]
+
+> [[fixed|done]] --[[Joey]]

doc/todo/not_ask_git_credentials_for_password_per_each_file/comment_4_4dca41df7506fa7aedf88d7618bbcf39._comment

@@ -0,0 +1,19 @@
+[[!comment format=mdwn
+ username="joey"
+ subject="""comment 4"""
+ date="2022-09-09T18:39:06Z"
+ content="""
+Fixed the autoinit case.
+
+I'm going to close this as done, despite the cases mentioned above where
+subprocesses might redundantly prompt for the credentials. 
+
+Another reason
+to not worry about those is that `git-annex sync` runs `git fetch` and `git
+push` (more than once), so there will be several password prompts there.
+So when git-annex runs a git-annex subprocess, it follows it's just as ok
+for it to do its own password prompts as it is for a git subprocess to do
+so. The solution to either is certianly to enable git's credential cache.
+So the scope of this todo has to be limited to prompting done by a single
+git-annex process.
+"""]]