Use wget -q --show-progress for less verbose wget output, when built with wget 1.16.

Build/Configure.hs

@@ -10,10 +10,13 @@ import Control.Monad
 
 import Build.TestConfig
 import Build.Version
+import Utility.PartialPrelude
+import Utility.Process
 import Utility.SafeCommand
 import Utility.ExternalSHA
 import Utility.Env
 import qualified Git.Version
+import Utility.DottedVersion
 
 tests :: [TestCase]
 tests =
@@ -29,6 +32,7 @@ tests =
 	, TestCase "rsync" $ requireCmd "rsync" "rsync --version >/dev/null"
 	, TestCase "curl" $ testCmd "curl" "curl --version >/dev/null"
 	, TestCase "wget" $ testCmd "wget" "wget --version >/dev/null"
+	, TestCase "wget supports -q --show-progress" checkWgetQuietProgress
 	, TestCase "bup" $ testCmd "bup" "bup --version >/dev/null"
 	, TestCase "nice" $ testCmd "nice" "nice true >/dev/null"
 	, TestCase "ionice" $ testCmd "ionice" "ionice -c3 true >/dev/null"
@@ -96,6 +100,18 @@ getGitVersion = do
 		error $ "installed git version " ++ show v ++ " is too old! (Need " ++ show oldestallowed ++ " or newer)"
 	return $ Config "gitversion" $ StringConfig $ show v
 
+checkWgetQuietProgress :: Test
+checkWgetQuietProgress = Config "wgetquietprogress" . BoolConfig
+	. maybe False (>= normalize "1.16")
+	<$> getWgetVersion 
+
+getWgetVersion :: IO (Maybe DottedVersion)
+getWgetVersion = extract <$> readProcess "wget" ["--version"]
+  where
+	extract s = case lines s of
+		[] -> Nothing
+		(l:_) -> normalize <$> headMaybe (drop 2 $ words l)
+
 getSshConnectionCaching :: Test
 getSshConnectionCaching = Config "sshconnectioncaching" . BoolConfig <$>
 	boolSystem "sh" [Param "-c", Param "ssh -o ControlPersist=yes -V >/dev/null 2>/dev/null"]