fix init in cripped filesystem version issues

* init: When a crippled filesystem causes an adjusted unlocked branch to
  be used, set repo version to 7, which it neglected to do before.
* init: When on a crippled filesystem, and the git version is too old
  to use an adjusted unlocked branch, fall back to using direct mode.

This commit was sponsored by Ilya Shlyakhter on Patreon.

Annex/AdjustedBranch.hs

@@ -28,6 +28,7 @@ module Annex.AdjustedBranch (
 	checkAdjustedClone,
 	isSupported,
 	checkVersionSupported,
+	isGitVersionSupported,
 ) where
 
 import Annex.Common
@@ -227,6 +228,7 @@ updateAdjustedBranch adj@(LinkAdjustment _) _ origbranch = preventCommits $ \com
 adjustToCrippledFileSystem :: Annex ()
 adjustToCrippledFileSystem = do
 	warning "Entering an adjusted branch where files are unlocked as this filesystem does not support locked files."
+	checkVersionSupported
 	whenM (isNothing <$> originalBranch) $
 		void $ inRepo $ Git.Branch.commitCommand Git.Branch.AutomaticCommit
 			[ Param "--quiet"

Annex/Init.hs

@@ -23,6 +23,7 @@ import qualified Annex
 import qualified Git
 import qualified Git.Config
 import qualified Git.Objects
+import qualified Git.LsFiles
 import qualified Annex.Branch
 import Logs.UUID
 import Logs.Trust.Basic
@@ -32,11 +33,12 @@ import Types.RepoVersion
 import Annex.Version
 import Annex.Difference
 import Annex.UUID
+import Annex.Link
 import Annex.WorkTree
 import Config
 import Config.Smudge
 import Annex.Direct
-import Annex.AdjustedBranch
+import qualified Annex.AdjustedBranch as AdjustedBranch
 import Annex.Environment
 import Annex.Hook
 import Annex.InodeSentinal
@@ -114,13 +116,13 @@ initialize' ai mversion = checkCanInitialize ai $ do
 		unlessM isBareRepo $ do
 			hookWrite postCheckoutHook
 			hookWrite postMergeHook
-	checkAdjustedClone >>= \case
-		NeedUpgradeForAdjustedClone -> 
+	AdjustedBranch.checkAdjustedClone >>= \case
+		AdjustedBranch.NeedUpgradeForAdjustedClone -> 
 			void $ upgrade True versionForAdjustedClone
-		InAdjustedClone -> return ()
-		NotInAdjustedClone ->
+		AdjustedBranch.InAdjustedClone -> return ()
+		AdjustedBranch.NotInAdjustedClone ->
 			ifM (crippledFileSystem <&&> (not <$> isBareRepo))
-				( adjustToCrippledFileSystem
+				( adjustToCrippledFilesystem
 				-- Handle case where this repo was cloned from a
 				-- direct mode repo
 				, unlessM isBareRepo
@@ -282,3 +284,20 @@ propigateSecureHashesOnly :: Annex ()
 propigateSecureHashesOnly =
 	maybe noop (setConfig (ConfigKey "annex.securehashesonly"))
 		=<< getGlobalConfig "annex.securehashesonly"
+
+adjustToCrippledFilesystem :: Annex ()
+adjustToCrippledFilesystem = ifM (liftIO $ AdjustedBranch.isGitVersionSupported)
+	( do
+		void $ upgrade True versionForCrippledFilesystem
+		AdjustedBranch.adjustToCrippledFileSystem
+	, enableDirectMode 
+	)
+
+enableDirectMode :: Annex ()
+enableDirectMode = unlessM isDirect $ do
+	warning "Enabling direct mode."
+	top <- fromRepo Git.repoPath
+	(l, clean) <- inRepo $ Git.LsFiles.inRepo [top]
+	forM_ l $ \f ->
+		maybe noop (`toDirect` f) =<< isAnnexLink f
+	void $ liftIO clean

Annex/Version.hs

@@ -28,6 +28,9 @@ supportedVersions = map RepoVersion [5, 7]
 versionForAdjustedClone :: RepoVersion
 versionForAdjustedClone = RepoVersion 7
 
+versionForCrippledFilesystem :: RepoVersion
+versionForCrippledFilesystem = RepoVersion 7
+
 upgradableVersions :: [RepoVersion]
 #ifndef mingw32_HOST_OS
 upgradableVersions = map RepoVersion [0..6]

CHANGELOG

@@ -5,6 +5,10 @@ git-annex (7.20181122) UNRELEASED; urgency=medium
     Thanks, Robert Schütz
   * When running youtube-dl to get a filename, pass --no-playlist.
   * Fix build without concurrent-output.
+  * init: When a crippled filesystem causes an adjusted unlocked branch to
+    be used, set repo version to 7, which it neglected to do before.
+  * init: When on a crippled filesystem, and the git version is too old
+    to use an adjusted unlocked branch, fall back to using direct mode.
 
  -- Joey Hess <id@joeyh.name>  Tue, 27 Nov 2018 12:29:27 -0400