Fix #63 - cmdline and date in toast -n output

nimterop/ast.nim

@@ -1,4 +1,4 @@
-import sequtils, sets, strformat, strutils, tables
+import os, sequtils, sets, strformat, strutils, tables, times
 
 import regex
 
@@ -128,9 +128,15 @@ proc searchAst(root: TSNode, astTable: AstTable, nimState: NimState) =
     if node == root:
       break
 
-proc printNim*(fullpath: string, root: TSNode, astTable: AstTable) =
-  echo "{.experimental: \"codeReordering\".}"
+proc printNimHeader*() =
+  echo """# Generated at $1
+# Command line:
+#   $2 $3
 
+{.experimental: "codeReordering".}
+""" % [$now(), getAppFilename(), commandLineParams().join(" ")]
+
+proc printNim*(fullpath: string, root: TSNode, astTable: AstTable) =
   var
     nimState = new(NimState)
     fp = fullpath.replace("\\", "/")

toast.nim

@@ -54,9 +54,7 @@ proc printLisp(root: TSNode) =
       break
 
 proc process(path: string, astTable: AstTable) =
-  if not existsFile(path):
-    echo "Invalid path " & path
-    return
+  doAssert existsFile(path), "Invalid path " & path
 
   var
     parser = tsParserNew()
@@ -141,7 +139,10 @@ proc main(
   if pgrammar:
     astTable.printGrammar()
   elif source.len != 0:
-    process(source[0], astTable)
+    if gStateRT.pnim:
+      printNimHeader()
+    for src in source:
+      process(src, astTable)
 
 when isMainModule:
   import cligen