more S3 docs

Remote/S3.hs

@@ -71,7 +71,7 @@ genRemote r u c cst = this
 			name = Git.repoDescribe r,
 	 		storeKey = s3Store this,
 			retrieveKeyFile = s3Retrieve this,
-			removeKey = error "TODO removekey",
+			removeKey = s3Remove this,
 			hasKey = s3CheckPresent this,
 			hasKeyCheap = False,
 			config = c
@@ -178,3 +178,12 @@ s3Retrieve r k f = s3Action r $ \(conn, bucket) -> do
 		Left e -> do
 			warning $ prettyReqError e
 			return False
+
+s3Remove :: Remote Annex -> Key -> Annex Bool
+s3Remove r k = s3Action r $ \(conn, bucket) -> do
+	res <- liftIO $ deleteObject conn $ bucketKey bucket k L.empty
+	case res of
+		Right _ -> return True
+		Left e -> do
+			warning $ prettyReqError e
+			return False

doc/install.mdwn

@@ -13,6 +13,7 @@ To build and use git-annex, you will need:
 * MissingH: <http://github.com/jgoerzen/missingh/wiki>
 * pcre-light: <http://hackage.haskell.org/package/pcre-light>
 * utf8-string: <http://hackage.haskell.org/package/utf8-string>
+* hS3: <http://hackage.haskell.org/package/hS3>
 * `uuid`: <http://www.ossp.org/pkg/lib/uuid/>
   (or uuidgen from util-linux)
 * `xargs`: <http://savannah.gnu.org/projects/findutils/>

doc/walkthrough/using_Amazon_S3.mdwn

@@ -10,12 +10,14 @@ First, export your S3 credentials:
 	# export ANNEX_S3_ACCESS_KEY_ID="08TJMT99S3511WOZEP91"
 	# export ANNEX_S3_SECRET_ACCESS_KEY="s3kr1t"
 
-Next, create the S3 remote.
+Next, create the S3 remote, and describe it.
 
 	# git annex initremote mys3 type=S3 encryption=none
 	initremote mys3 (checking bucket) (creating bucket in US) ok
+	# git annex describe mys3 "at Amazon's US datacenter"
+	describe mys3 ok
 
-The configuration for the S3 remote is stored in git. So to make a different
+The configuration for the S3 remote is stored in git. So to make another
 repository use the same S3 remote is easy:
 
 	# cd /media/usb/annex