Format strings can be specified using the new --find option, to control what is output by git annex find.

Annex.hs

@@ -37,6 +37,7 @@ import Types.BranchState
 import Types.TrustLevel
 import Types.UUID
 import qualified Utility.Matcher
+import qualified Utility.Format
 import qualified Data.Map as M
 
 -- git-annex's monad
@@ -62,7 +63,7 @@ data AnnexState = AnnexState
 	, force :: Bool
 	, fast :: Bool
 	, auto :: Bool
-	, print0 :: Bool
+	, format :: Maybe Utility.Format.Format
 	, branchstate :: BranchState
 	, catfilehandle :: Maybe CatFileHandle
 	, forcebackend :: Maybe String
@@ -85,7 +86,7 @@ newState gitrepo = AnnexState
 	, force = False
 	, fast = False
 	, auto = False
-	, print0 = False
+	, format = Nothing
 	, branchstate = startBranchState
 	, catfilehandle = Nothing
 	, forcebackend = Nothing

Command/Find.hs

@@ -7,11 +7,16 @@
 
 module Command.Find where
 
+import qualified Data.Map as M
+
 import Common.Annex
 import Command
 import Annex.Content
 import Limit
 import qualified Annex
+import qualified Utility.Format
+import Utility.DataUnits
+import Types.Key
 
 def :: [Command]
 def = [command "find" paramPaths seek "lists available files"]
@@ -24,8 +29,18 @@ start file (key, _) = do
 	-- only files inAnnex are shown, unless the user has requested
 	-- others via a limit
 	whenM (liftM2 (||) (inAnnex key) limited) $ do
-		print0 <- Annex.getState Annex.print0
-		if print0
-			then liftIO $ putStr (file ++ "\0")
-			else liftIO $ putStrLn file
+		f <- Annex.getState Annex.format
+		case f of
+			Nothing -> liftIO $ putStrLn file
+			Just formatter -> liftIO $ putStr $
+				Utility.Format.format formatter vars
 	stop
+	where
+		vars = M.fromList
+			[ ("file", file)
+			, ("key", show key)
+			, ("backend", keyBackendName key)
+			, ("bytesize", size show)
+			, ("humansize", size $ roughSize storageUnits True)
+			]
+		size c = maybe "unknown" c $ keySize key

GitAnnex.hs

@@ -18,6 +18,7 @@ import Types.TrustLevel
 import qualified Annex
 import qualified Remote
 import qualified Limit
+import qualified Utility.Format
 
 import qualified Command.Add
 import qualified Command.Unannex
@@ -108,8 +109,10 @@ options = commonOptions ++
 		"override trust setting to untrusted"
 	, Option ['c'] ["config"] (ReqArg setgitconfig "NAME=VALUE")
 		"override git configuration setting"
-	, Option [] ["print0"] (NoArg (setprint0 True))
-		"terminate filename with null"
+	, Option [] ["print0"] (NoArg setprint0)
+		"terminate output with null"
+	, Option [] ["format"] (ReqArg setformat paramFormat)
+		"control format of output"
 	, Option ['x'] ["exclude"] (ReqArg Limit.addExclude paramGlob)
 		"skip files matching the glob pattern"
 	, Option ['I'] ["include"] (ReqArg Limit.addInclude paramGlob)
@@ -125,7 +128,8 @@ options = commonOptions ++
 		setto v = Annex.changeState $ \s -> s { Annex.toremote = Just v }
 		setfrom v = Annex.changeState $ \s -> s { Annex.fromremote = Just v }
 		setnumcopies v = Annex.changeState $ \s -> s {Annex.forcenumcopies = readMaybe v }
-		setprint0 v = Annex.changeState $ \s -> s { Annex.print0 = v }
+		setformat v = Annex.changeState $ \s -> s { Annex.format = Just $ Utility.Format.gen v }
+		setprint0 = setformat "${file}\0"
 		setgitconfig :: String -> Annex ()
 		setgitconfig v = do
 			newg <- inRepo $ Git.Config.store v

Options.hs

@@ -82,6 +82,8 @@ paramUUID :: String
 paramUUID = "UUID"
 paramType :: String
 paramType = "TYPE"
+paramFormat :: String
+paramFormat = "FORMAT"
 paramKeyValue :: String
 paramKeyValue = "K=V"
 paramNothing :: String

Utility/Format.hs

@@ -5,7 +5,7 @@
  - Licensed under the GNU GPL version 3 or higher.
  -}
 
-module Utility.Format (gen, format) where
+module Utility.Format (Format, gen, format) where
 
 import Text.Printf (printf)
 import Data.String.Utils (replace)

debian/changelog

@@ -10,6 +10,8 @@ git-annex (3.20111212) UNRELEASED; urgency=low
   * Add --include, which is the same as --not --exclude.
   * Can now be built with older git versions (before 1.7.7); the resulting
     binary should only be used with old git.
+  * Format strings can be specified using the new --find option, to control
+    what is output by git annex find.
 
  -- Joey Hess <joeyh@debian.org>  Mon, 12 Dec 2011 01:57:49 -0400
 

doc/git-annex.mdwn

@@ -250,7 +250,11 @@ subdirectories).
   annexed files whose content is not present, specify --not --in "."
 
   To output filenames terminated with nulls, for use with xargs -0,
-  specify --print0.
+  specify --print0. Or, a custom output formatting can be specified using
+  --format. The default output format is the same as --format='${file}\n'
+
+  These variables are available for use in formats: file, key, backend,
+  bytesize, humansize
 
 * whereis [path ...]
 
@@ -428,6 +432,14 @@ subdirectories).
   are in the annex, their backend is known and this option is not
   necessary.
 
+* --format=value
+
+  Specifies a custom output format. The value is a format string, 
+  in which '${var}' is expanded to the value of a variable. To right-align
+  a variable with whitespace, use '${var;width}' ; to left-align
+  a variable, use '${var;-width}'. Also, '\n' is a newline, '\0' is a NULL,
+  etc.
+
 * -c name=value
 
   Used to override git configuration settings. May be specified multiple times.