reinject --known: Avoid second, unncessary checksum of file.

CHANGELOG

@@ -10,6 +10,7 @@ git-annex (6.20161032) UNRELEASED; urgency=medium
   * S3: Support the special case endpoint needed for the cn-north-1 region.
   * Webapp: Don't list the Frankfurt region, as this (and some other new
     regions) need V4 authorization which the aws library does not yet use.
+  * reinject --known: Avoid second, unncessary checksum of file.
 
  -- Joey Hess <id@joeyh.name>  Tue, 01 Nov 2016 14:02:06 -0400
 

Command/Reinject.hs

@@ -45,7 +45,7 @@ startSrcDest (src:dest:[])
 	| otherwise = notAnnexed src $ do
 		showStart "reinject" dest
 		next $ ifAnnexed dest
-			(perform src)
+			(\key -> perform src key (verifyKeyContent DefaultVerify UnVerified key src))
 			stop
 startSrcDest _ = error "specify a src file and a dest file"
 
@@ -56,7 +56,7 @@ startKnown src = notAnnexed src $ do
 	case mkb of
 		Nothing -> error "Failed to generate key"
 		Just (key, _) -> ifM (isKnownKey key)
-			( next $ perform src key
+			( next $ perform src key (return True)
 			, do
 				warning "Not known content; skipping"
 				next $ next $ return True
@@ -65,14 +65,14 @@ startKnown src = notAnnexed src $ do
 notAnnexed :: FilePath -> CommandStart -> CommandStart
 notAnnexed src = ifAnnexed src (error $ "cannot used annexed file as src: " ++ src)
 
-perform :: FilePath -> Key -> CommandPerform
-perform src key = ifM move
+perform :: FilePath -> Key -> Annex Bool -> CommandPerform
+perform src key verify = ifM move
 	( next $ cleanup key
 	, error "failed"
 	)
   where
 	move = checkDiskSpaceToGet key False $
-		ifM (verifyKeyContent DefaultVerify UnVerified key src)
+		ifM verify
 			( do
 				moveAnnex key src
 				return True

doc/forum/Timeline_of_git_reinject__63__/comment_1_e88d612590d3cd0c2ea824c1e8a38678._comment

@@ -0,0 +1,19 @@
+[[!comment format=mdwn
+ username="joey"
+ subject="""comment 1"""
+ date="2016-11-07T16:02:28Z"
+ content="""
+What turns out to have been going on here is the file was first checksummed
+silently to get the key and see if it is --known, 
+and then checksummed a second time (with the message displayed) as part of
+the reinject process.
+
+So, the second checksum is not needed in --known mode and I've made it not
+be done.
+
+It might be that the "(checksum)" message should be displayed during the
+intial checksum of the file. git-annex used to always say when it
+checksummed, but [[!commit 64160a96795d03ee791faa4757057200934687bc]] got
+rid of that in most cases. I guess that "reinject bigfile <13 minute wait> ok"
+is acceptable output though.
+"""]]