3 files changed, 11 insertions, 1 deletions
diff --git a/src/GF/Shell.hs b/src/GF/Shell.hs
index c98adfb66..1874bc4d5 100644
--- a/src/GF/Shell.hs
+++ b/src/GF/Shell.hs
@@ -30,6 +30,7 @@ import GetTree
 
 import ShellCommands
 
+import VisualizeGrammar (visualizeCanonGrammar, visualizeSourceGrammar)
 import API
 import IOGrammar
 import Compile
@@ -244,6 +245,13 @@ execC co@(comm, opts0) sa@((st,(h,_)),a) = checkOptions st co >> case comm of
   CPrintMultiGrammar  -> do
     sa' <- changeState purgeShellState sa
     returnArg (AString (optPrintMultiGrammar opts cgr)) sa'
+  CShowGrammarGraph  -> do
+    ---- sa' <- changeState purgeShellState sa
+    let g0 = writeFile "grphtmp.dot" $ visualizeCanonGrammar cgr
+        g1 = system "dot -Tps grphtmp.dot >grphtmp.ps" 
+        g2 = system "gv grphtmp.ps &" 
+        g3 = return () ---- system "rm -f grphtmp.*"
+    justOutput opts (g0 >> g1 >> g2 >> g3 >> return ()) sa
   CPrintSourceGrammar -> 
       returnArg (AString (visualizeSourceGrammar src)) sa
 
diff --git a/src/GF/Shell/PShell.hs b/src/GF/Shell/PShell.hs
index 08ba2a4e1..dd797be5e 100644
--- a/src/GF/Shell/PShell.hs
+++ b/src/GF/Shell/PShell.hs
@@ -129,7 +129,8 @@ pCommand ws = case ws of
   "pxs" : []     -> aUnit CPrintCanonXMLStruct
   "px"  : []     -> aUnit CPrintCanonXML
   "pm"  : []     -> aUnit CPrintMultiGrammar
-  "sg" : []     -> aUnit CPrintSourceGrammar
+  "vg"  : []     -> aUnit CShowGrammarGraph
+  "sg"  : []     -> aUnit CPrintSourceGrammar
   "po"  : []     -> aUnit CPrintGlobalOptions
   "pl"  : []     -> aUnit CPrintLanguages
   "h"   : c : [] -> aUnit $ CHelp (Just (abbrevCommand c))
diff --git a/src/GF/Shell/ShellCommands.hs b/src/GF/Shell/ShellCommands.hs
index be1137440..c28bcad48 100644
--- a/src/GF/Shell/ShellCommands.hs
+++ b/src/GF/Shell/ShellCommands.hs
@@ -73,6 +73,7 @@ data Command =
  | CPrintInformation I.Ident
  | CPrintMultiGrammar
  | CPrintSourceGrammar
+ | CShowGrammarGraph
  | CPrintGramlet 
  | CPrintCanonXML
  | CPrintCanonXMLStruct