move --to=here

* move --to=here moves from all reachable remotes to the local repository.

The output of move --from remote is changed slightly, when the remote and
local both have the content. It used to say:
move foo ok
Now:
move foo (from theremote...) ok

That was done so that, when move --to=here is used and the content is
locally present and also in several remotes, it's clear which remotes the
content gets dropped from.

Note that move --to=here will report an error if a non-reachable remote
contains the file, even if the local repository also contains the file. I
think that's reasonable; the user may be intending to move all other copies
of the file from remotes.

OTOH, if a copy of the file is believed to be present in some repository
that is not a configured remote, move --to=here does not report an error.
So a little bit inconsistent, but erroring in this case feels wrong.

copy --to=here came along for free, but it's basically the same behavior as
git-annex get, and probably with not as good messages in edge cases
(especially on failure), so I've not documented it.

This commit was sponsored by Anthony DeRobertis on Patreon.

CHANGELOG

@@ -1,5 +1,6 @@
 git-annex (6.20170520) UNRELEASED; urgency=medium
 
+  * move --to=here moves from all reachable remotes to the local repository.
   * initremote, enableremote: Support gpg subkeys suffixed with an
     exclamation mark, which forces gpg to use a specific subkey.
   * Improve progress display when watching file size, in cases where

Command/Copy.hs

@@ -52,7 +52,10 @@ start o file key = stopUnless shouldCopy $
 		| autoMode o = want <||> numCopiesCheck file key (<)
 		| otherwise = return True
 	want = case Command.Move.fromToOptions (moveOptions o) of
-		Right (ToRemote dest) -> (Remote.uuid <$> getParsed dest) >>=
-			wantSend False (Just key) (AssociatedFile (Just file))
-		Right (FromRemote _) ->
-			wantGet False (Just key) (AssociatedFile (Just file))
+		Right (ToRemote dest) ->
+			(Remote.uuid <$> getParsed dest) >>= checkwantsend
+		Right (FromRemote _) -> checkwantget
+		Left Command.Move.ToHere -> checkwantget
+			
+	checkwantsend = wantSend False (Just key) (AssociatedFile (Just file))
+	checkwantget = wantGet False (Just key) (AssociatedFile (Just file))

Command/Move.hs

@@ -1,6 +1,6 @@
 {- git-annex command
  -
- - Copyright 2010-2015 Joey Hess <id@joeyh.name>
+ - Copyright 2010-2017 Joey Hess <id@joeyh.name>
  -
  - Licensed under the GNU GPL version 3 or higher.
  -}
@@ -75,6 +75,9 @@ start' o move afile key ai =
 		Right (ToRemote dest) ->
 			checkFailedTransferDirection ai Upload $
 				toStart move afile key ai =<< getParsed dest
+		Left ToHere ->
+			checkFailedTransferDirection ai Download $
+				toHereStart move afile key ai
 
 showMoveAction :: Bool -> Key -> ActionItem -> Annex ()
 showMoveAction move = showStart' (if move then "move" else "copy")
@@ -181,14 +184,15 @@ fromOk src key = go =<< Annex.getState Annex.force
 		return $ u /= Remote.uuid src && elem src remotes
 
 fromPerform :: Remote -> Bool -> Key -> AssociatedFile -> CommandPerform
-fromPerform src move key afile = ifM (inAnnex key)
+fromPerform src move key afile = do
+	showAction $ "from " ++ Remote.name src
+	ifM (inAnnex key)
 		( dispatch move True
 		, dispatch move =<< go
 		)
   where
 	go = notifyTransfer Download afile $ 
-		download (Remote.uuid src) key afile forwardRetry $ \p -> do
-			showAction $ "from " ++ Remote.name src
+		download (Remote.uuid src) key afile forwardRetry $ \p ->
 			getViaTmp (RemoteVerify src) key $ \t ->
 				Remote.retrieveKeyFile src key afile t p
 	dispatch _ False = stop -- failed
@@ -208,3 +212,20 @@ fromPerform src move key afile = ifM (inAnnex key)
 		ok <- Remote.removeKey src key
 		next $ Command.Drop.cleanupRemote key src ok
 	faileddropremote = giveup "Unable to drop from remote."
+
+{- Moves (or copies) the content of an annexed file from reachable remotes
+ - to the current repository.
+ -
+ - When moving, the content is removed from all the reachable remotes. -}
+toHereStart ::  Bool -> AssociatedFile -> Key -> ActionItem -> CommandStart
+toHereStart move afile key ai
+	| move = go
+	| otherwise = stopUnless (not <$> inAnnex key) go
+  where
+	go = do
+		rs <- Remote.keyPossibilities key
+		forM_ rs $ \r ->
+			includeCommandAction $ do
+				showMoveAction move key ai
+				next $ fromPerform r move key afile
+		stop

doc/git-annex-copy.mdwn

@@ -14,14 +14,14 @@ Copies the content of files from or to another remote.
 
 * `--from=remote`
 
-  Use this option to copy the content of files from the specified
+  Copy the content of files from the specified
   remote to the local repository.
   
   Any files that are not available on the remote will be silently skipped.
 
 * `--to=remote`
 
-  Use this option to copy the content of files from the local repository
+  Copy the content of files from the local repository
   to the specified remote.
 
 * `--jobs=N` `-JN`

doc/git-annex-move.mdwn

@@ -4,7 +4,7 @@ git-annex move - move content of files to/from another repository
 
 # SYNOPSIS
 
-git annex move `[path ...] [--from=remote|--to=remote]`
+git annex move `[path ...] [--from=remote|--to=remote|--to=here]`
 
 # DESCRIPTION
 
@@ -14,13 +14,16 @@ Moves the content of files from or to another remote.
 
 * `--from=remote`
 
-  Use this option to move the content of files from the specified
-  remote to the local repository.
+  Move the content of files from the specified remote to the local repository.
 
 * `--to=remote`
 
-  Use this option to move the content of files from the local repository
-  to the specified remote.
+  Move the content of files from the local repository to the specified remote.
+
+* `--to=here`
+
+  Move the content of files from all reachable remotes to the local
+  repository.
 
 * `--jobs=N` `-JN`