detect system with no dot in FQDN, where git commit will fail, and workaround

Sigh, git is so *fragile*. Or rather, across the set of systems that use
git-annex, where are no many horribly broken systems..

Annex/Environment.hs

@@ -13,10 +13,19 @@ import Common.Annex
 import Utility.Env
 import Utility.UserInfo
 import qualified Git.Config
+import Config
+import Annex.Exception
 
 {- Checks that the system's environment allows git to function.
  - Git requires a GECOS username, or suitable git configuration, or
- - environment variables. -}
+ - environment variables.
+ -
+ - Git also requires the system have a hostname containing a dot.
+ - Otherwise, it tries various methods to find a FQDN, and will fail if it
+ - does not. To avoid replicating that code here, which would break if its
+ - methods change, this function does not check the hostname is valid.
+ - Instead, code that commits can use ensureCommit.
+ -}
 checkEnvironment :: Annex ()
 checkEnvironment = do
 	gitusername <- fromRepo $ Git.Config.getMaybe "user.name"
@@ -42,3 +51,12 @@ checkEnvironmentIO =
 	ensureEnv _ _ = noop
 #endif
 #endif
+
+{- Runs an action that commits to the repository, and if it fails, 
+ - sets user.email to a dummy value and tries the action again. -}
+ensureCommit :: Annex a -> Annex a
+ensureCommit a = either retry return =<< tryAnnex a 
+  where
+  	retry _ = do
+		setConfig (ConfigKey "user.email") =<< liftIO myUserName
+		a

Assistant/WebApp/Configurators/Local.hs

@@ -366,9 +366,7 @@ inDir dir a = do
 {- Creates a new repository, and returns its UUID. -}
 initRepo :: Bool -> Bool -> FilePath -> Maybe String -> IO UUID
 initRepo True primary_assistant_repo dir desc = inDir dir $ do
-	{- Initialize a git-annex repository in a directory with a description. -}
-	unlessM isInitialized $
-		initialize desc
+	initRepo' desc
 	{- Initialize the master branch, so things that expect
 	 - to have it will work, before any files are added. -}
 	unlessM (Git.Config.isBare <$> gitRepo) $
@@ -391,9 +389,13 @@ initRepo True primary_assistant_repo dir desc = inDir dir $ do
 	getUUID
 {- Repo already exists, could be a non-git-annex repo though. -}
 initRepo False _ dir desc = inDir dir $ do
+	initRepo' desc
+	getUUID
+
+initRepo' :: Maybe String -> Annex ()
+initRepo' desc = do
 	unlessM isInitialized $
 		initialize desc
-	getUUID
 
 {- Checks if the user can write to a directory.
  -

Init.hs

@@ -32,6 +32,7 @@ import Utility.FileMode
 import Config
 import Annex.Direct
 import Annex.Content.Direct
+import Annex.Environment
 import Backend
 
 genDescription :: Maybe String -> Annex String
@@ -53,11 +54,14 @@ initialize mdescription = do
 	setVersion defaultVersion
 	checkCrippledFileSystem
 	checkFifoSupport
-	Annex.Branch.create
 	gitPreCommitHookWrite
 	createInodeSentinalFile
 	u <- getUUID
-	describeUUID u =<< genDescription mdescription
+	{- This will make the first commit to git, so ensure git is set up
+	 - properly to allow commits when running it. -}
+	ensureCommit $ do
+		Annex.Branch.create
+		describeUUID u =<< genDescription mdescription
 
 uninitialize :: Annex ()
 uninitialize = do

debian/changelog

@@ -12,6 +12,9 @@ git-annex (4.20130628) UNRELEASED; urgency=low
     automatically update its working copy when git annex sync or the assistant
     sync with it.
   * webapp: Fix ssh setup with nonstandard port, broken in last release.
+  * init: Detect systems on which git commit fails due to not being able to
+    determine the FQDN, and put in a workaround so committing to the git-annex
+    branch works.
 
  -- Joey Hess <joeyh@debian.org>  Tue, 02 Jul 2013 15:40:55 -0400
 

doc/bugs/view_logs_fails:_Internal_Server_Error__internal_liftAnnex.mdwn

@@ -15,3 +15,6 @@ When clicking on "View logs", I get the following error:
 ### What version of git-annex are you using? On what operating system?
 - git-annex 4.20130627 on Ubuntu 13.10, installed from debian unstable (sid) repository.
 - git version 1.8.1.2
+
+> I've made it detect systems that lack a FQDN and set user.email
+> automatically. [[done]] --[[Joey]]