Always try to thaw content, even when annex.crippledfilesystem is set.

Annex/Content.hs

@@ -951,8 +951,13 @@ chmodContent file = unlessM crippledFileSystem $
 {- Allows writing to an annexed file that freezeContent was called on
  - before. -}
 thawContent :: FilePath -> Annex ()
-thawContent file = unlessM crippledFileSystem $
+thawContent file = ifM crippledFileSystem
-	withShared go
+	-- Probably cannot change mode on crippled filesystem,
+	-- but if file modes are supported, the content may be frozen
+	-- so try to thaw it.
+	( void $ tryNonAsync $ withShared go
+	, withShared go
+	)
   where
 	go GroupShared = liftIO $ groupWriteRead file
 	go AllShared = liftIO $ groupWriteRead file

Annex/Perms.hs

@@ -92,8 +92,15 @@ freezeContentDir file = unlessM crippledFileSystem $
 	go _ = liftIO $ preventWrite dir
 
 thawContentDir :: FilePath -> Annex ()
-thawContentDir file = unlessM crippledFileSystem $
+thawContentDir file = ifM crippledFileSystem
-	liftIO $ allowWrite $ parentDir file
+	-- Probably cannot change mode on crippled filesystem,
+	-- but if file modes are supported, the directory may be frozen,
+	-- so try to thaw it.
+	( void $ tryNonAsync go
+	, go
+	)
+  where
+	go = liftIO $ allowWrite $ parentDir file
 
 {- Makes the directory tree to store an annexed file's content,
  - with appropriate permissions on each level. -}

debian/changelog

@@ -11,6 +11,7 @@ git-annex (6.20160230) UNRELEASED; urgency=medium
   * dropkey: Add --batch and --json.
   * Fix OSX dmg to include libraries needed by bundled gpg,
     lost in last release.
+  * Always try to thaw content, even when annex.crippledfilesystem is set.
 
  -- Joey Hess <id@joeyh.name>  Mon, 29 Feb 2016 13:00:30 -0400
 

doc/bugs/git-annex:_failed_to_lock_content.mdwn

@@ -103,3 +103,5 @@ Could the problem have something to do with the file having permission 0444 and
 ### Have you had any luck using git-annex before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)
 
 Been using it since your kickstarter campaign!
+
+> [[done]] --[[Joey]]

doc/bugs/git-annex:_failed_to_lock_content/comment_6_ced3c56607762562c1d21fd821d7c779._comment

@@ -0,0 +1,11 @@
+[[!comment format=mdwn
+ username="joey"
+ subject="""comment 6"""
+ date="2016-03-09T17:31:18Z"
+ content="""
+Ok, I managed to get a vfat that honors file perms with those mount
+options.
+
+I'm going to make git-annex always try to chmod the file, even if it's on a
+crippled filesystem. That should solve it.
+"""]]