take the usage info header as an argument

oops!

TAP/Options.idr

@@ -84,7 +84,8 @@ private
 setFilter : String -> Mod
 setFilter str opts = pure $ {pattern := Just str} opts
 
-mutual
+parameters (header : String)
+ mutual
   ||| option descriptions
   export
   opts : List (OptDescr Mod)
@@ -119,7 +120,7 @@ mutual
   ||| usage message
   export
   usage : List String
-  usage = assert_total $ "quox test suite" :: lines (usageInfo "" opts)
+  usage = assert_total $ header :: lines (usageInfo "" opts)
 
 
 ||| interpret the result of `getOpt`
@@ -137,19 +138,20 @@ getArgs1 =
        []        => failureWith ["expected getArgs to start with exe name"]
 
 
-||| read & interpret the command line arguments
+||| read & interpret the command line arguments.
+||| the first argument is the header to print on the usage message.
 |||
 ||| [todo] allow unrecognised things and pass them back out
 export
-getTestOpts' : List String -> IO Options
-getTestOpts' args =
-  case getOpt Permute opts args of
+getTestOpts' : String -> List String -> IO Options
+getTestOpts' header args =
+  case getOpt Permute (opts header) args of
        MkResult opts [] [] [] => makeOpts opts
-       res                    => failureWith $ res.errors ++ usage
+       res                    => failureWith $ res.errors ++ usage header
 
 ||| interpret some command line arguments passed in
 |||
 ||| [todo] allow unrecognised things and pass them back out
 export
-getTestOpts : IO Options
-getTestOpts = getTestOpts' !getArgs1
+getTestOpts : String -> IO Options
+getTestOpts header = getTestOpts' header !getArgs1