Tab completion of many commands like info and trust now includes remotes

Especially useful with proxied remotes and clusters, where the user may not
be entirely familiar with the name and can learn by tab completion.

CmdLine/GitAnnex/Options.hs

@@ -1,6 +1,6 @@
 {- git-annex command-line option parsing
  -
- - Copyright 2010-2023 Joey Hess <id@joeyh.name>
+ - Copyright 2010-2024 Joey Hess <id@joeyh.name>
  -
  - Licensed under the GNU AGPL version 3 or higher.
  -}
@@ -109,9 +109,12 @@ gitAnnexCommonOptions = commonOptions ++
 
 {- Parser that accepts all non-option params. -}
 cmdParams :: CmdParamsDesc -> Parser CmdParams
-cmdParams paramdesc = many $ argument str
+cmdParams paramdesc = cmdParamsWithCompleter paramdesc completeFiles
+
+cmdParamsWithCompleter :: String -> Mod ArgumentFields String -> Parser CmdParams
+cmdParamsWithCompleter paramdesc completers = many $ argument str
 	( metavar paramdesc
-	<> action "file"
+	<> completers
 	)
 
 parseAutoOption :: Parser Bool
@@ -597,3 +600,7 @@ completeRemotes' g input = do
 completeBackends :: HasCompleter f => Mod f a
 completeBackends = completeWith $
 	map (decodeBS . formatKeyVariety . Backend.backendVariety) Backend.builtinList
+
+completeFiles :: HasCompleter f => Mod f a
+completeFiles = action "file"
+