dependency graph can be restricted to some modules; added help dg

src/compiler/GF/Infra/Dependencies.hs

@@ -6,8 +6,11 @@ import GF.Grammar.Grammar
 import GF.Infra.Modules
 import GF.Infra.Ident
 
-depGraph :: SourceGrammar -> String
-depGraph = prDepGraph . grammar2moddeps
+import Data.List (nub,isPrefixOf)
+
+-- the list gives the only modules to show, e.g. to hide the library details
+depGraph :: Maybe [String] -> SourceGrammar -> String
+depGraph only = prDepGraph . grammar2moddeps only
 
 prDepGraph :: [(Ident,ModDeps)] -> String
 prDepGraph deps = unlines $ [
@@ -47,15 +50,25 @@ data ModDeps = ModDeps {
 
 noModDeps = ModDeps MTAbstract [] [] [] [] [] [] []
 
-grammar2moddeps :: SourceGrammar -> [(Ident,ModDeps)]
-grammar2moddeps gr = [(i,depMod m) | (i,m) <- modules gr] where
-  depMod m = noModDeps{
-    modtype = mtype m,
-    ofs     = case mtype m of 
-                MTConcrete i -> [i]
-                MTInstance i -> [i]
-                _ -> [],
-    extendeds = map fst (extend m),
-    openeds = map openedModule (opens m),
-    extrads = mexdeps m
-    }
+grammar2moddeps :: Maybe [String] -> SourceGrammar -> [(Ident,ModDeps)]
+grammar2moddeps monly gr = [(i,depMod i m) | (i,m) <- modules gr, yes i]
+  where
+    depMod i m = 
+        noModDeps{
+          modtype = mtype m,
+          ofs     = case mtype m of 
+                     MTConcrete i -> [i | yes i]
+                     MTInstance i -> [i | yes i]
+                     _ -> [],
+          extendeds = nub $ filter yes $ map fst (extend m),
+          openeds = nub $ filter yes $ map openedModule (opens m),
+          extrads = nub $ filter yes $ mexdeps m
+          }
+    yes i = case monly of 
+      Just only -> match (showIdent i) only
+      _ -> True
+    match s os = any (\x -> doMatch x s) os
+    doMatch x s = case last x of 
+      '*' -> isPrefixOf (init x) s
+      _   -> x == s
+