adeiu, MissingH

Removed dependency on MissingH, instead depending on the split
library.

After laying groundwork for this since 2015, it
was mostly straightforward. Added Utility.Tuple and
Utility.Split. Eyeballed System.Path.WildMatch while implementing
the same thing.

Since MissingH's progress meter display was being used, I re-implemented
my own. Bonus: Now progress is displayed for transfers of files of
unknown size.

This commit was sponsored by Shane-o on Patreon.

Utility/Gpg.hs

@@ -14,11 +14,9 @@ import qualified Build.SysConfig as SysConfig
 #ifndef mingw32_HOST_OS
 import System.Posix.Types
 import qualified System.Posix.IO
-import System.Path
 import Utility.Env
-#else
-import Utility.Tmp
 #endif
+import Utility.Tmp
 import Utility.Format (decode_c)
 
 import Control.Concurrent
@@ -336,23 +334,21 @@ keyBlock public ls = unlines
 {- Runs an action using gpg in a test harness, in which gpg does
  - not use ~/.gpg/, but a directory with the test key set up to be used. -}
 testHarness :: GpgCmd -> IO a -> IO a
-testHarness cmd a = do
-	orig <- getEnv var
-	bracket setup (cleanup orig) (const a)
+testHarness cmd a = withTmpDir "gpgtmpXXXXXX" $ \tmpdir ->
+	bracket (setup tmpdir) (cleanup tmpdir) (const a)
   where
 	var = "GNUPGHOME"		
 
-	setup = do
-		base <- getTemporaryDirectory
-		dir <- mktmpdir $ base </> "gpgtmpXXXXXX"
-		setEnv var dir True
+	setup tmpdir = do
+		orig <- getEnv var
+		setEnv var tmpdir True
 		-- For some reason, recent gpg needs a trustdb to be set up.
 		_ <- pipeStrict cmd [Param "--trust-model", Param "auto", Param "--update-trustdb"] []
 		_ <- pipeStrict cmd [Param "--import", Param "-q"] $ unlines
 			[testSecretKey, testKey]
-		return dir
+		return orig
 		
-	cleanup orig tmpdir = do
+	cleanup tmpdir orig = do
 		removeDirectoryRecursive tmpdir
 			-- gpg-agent may be shutting down at the same time
 			-- and may delete its socket at the same time as