GF.Command.Commands: allCommands is now a constant

The dependency on PGFEnv has been moved from the list to the exec function of
the commands in the list. This means that the help command no longer needs
to generate a new list of commands and that the state of the shell
(type GF.Command.Interpreter.CommandEnv) no longer needs to contain the list
of commands.

src/compiler/GF/Command/Interpreter.hs

@@ -1,5 +1,5 @@
 module GF.Command.Interpreter (
-  CommandEnv (..),
+  CommandEnv,commands,multigrammar,commandmacros,expmacros,
   mkCommandEnv,
   emptyCommandEnv,
   interpretCommandLine,
@@ -24,15 +24,16 @@ import qualified Data.Map as Map
 data CommandEnv = CommandEnv {
   multigrammar  :: PGF,
   morphos       :: Map.Map Language Morpho,
-  commands      :: Map.Map String CommandInfo,
+--commands      :: Map.Map String CommandInfo,
   commandmacros :: Map.Map String CommandLine,
   expmacros     :: Map.Map String Expr
   }
+commands _ = allCommands
 
 mkCommandEnv :: PGF -> CommandEnv
 mkCommandEnv pgf = 
   let mos = Map.fromList [(la,buildMorpho pgf la) | la <- languages pgf] in
-    CommandEnv pgf mos (allCommands (pgf, mos)) Map.empty Map.empty
+    CommandEnv pgf mos {-allCommands-} Map.empty Map.empty
 
 emptyCommandEnv :: CommandEnv
 emptyCommandEnv = mkCommandEnv emptyPGF
@@ -86,7 +87,8 @@ interpret env trees comm =
   case getCommand env trees comm of
     Left  msg               -> do putStrLn ('\n':msg)
                                   return ([],[])
-    Right (info,opts,trees) -> do tss@(_,s) <- exec info opts trees
+    Right (info,opts,trees) -> do let cmdenv = (multigrammar env,morphos env)
+                                  tss@(_,s) <- exec info cmdenv opts trees
                                   if isOpt "tr" opts
                                     then putStrLn s
                                     else return ()