moved getopts to Scala;

--- a/lib/Tools/update_theorems	Sun Feb 28 15:26:09 2016 +0100
+++ b/lib/Tools/update_theorems	Sun Feb 28 15:34:50 2016 +0100
@@ -4,37 +4,6 @@
 #
 # DESCRIPTION: update toplevel theorem keywords
 
-
-## diagnostics
-
-PRG="$(basename "$0")"
+isabelle_admin_build jars || exit $?
 
-function usage()
-{
-  echo
-  echo "Usage: isabelle $PRG [FILES|DIRS...]"
-  echo
-  echo "  Recursively find .thy files and update toplevel theorem keywords:"
-  echo
-  echo "    theorems             ~>  lemmas"
-  echo "    schematic_theorem    ~>  schematic_goal"
-  echo "    schematic_lemma      ~>  schematic_goal"
-  echo "    schematic_corollary  ~>  schematic_goal"
-  echo
-  echo "  Old versions of files are preserved by appending \"~~\"."
-  echo
-  exit 1
-}
-
-
-## process command line
-
-[ "$#" -eq 0 -o "$1" = "-?" ] && usage
-
-SPECS="$@"; shift "$#"
-
-
-## main
-
-find $SPECS -name \*.thy -print0 | \
-  xargs -0 "$ISABELLE_TOOL" java isabelle.Update_Theorems
+"$ISABELLE_TOOL" java isabelle.Update_Theorems "$@"

--- a/src/Pure/Tools/update_theorems.scala	Sun Feb 28 15:26:09 2016 +0100
+++ b/src/Pure/Tools/update_theorems.scala	Sun Feb 28 15:34:50 2016 +0100
@@ -34,7 +34,26 @@
   def main(args: Array[String])
   {
     Command_Line.tool0 {
-      args.foreach(arg => update_theorems(Path.explode(arg)))
+      val getopts = Getopts(() => """
+Usage: isabelle update_theorems [FILES|DIRS...]
+
+  Recursively find .thy files and update toplevel theorem keywords:
+
+    theorems             ~>  lemmas
+    schematic_theorem    ~>  schematic_goal
+    schematic_lemma      ~>  schematic_goal
+    schematic_corollary  ~>  schematic_goal
+
+  Old versions of files are preserved by appending "~~".
+""")
+
+      val specs = getopts(args)
+      if (specs.isEmpty) getopts.usage()
+
+      for {
+        spec <- specs
+        file <- File.find_files(Path.explode(spec).file, file => file.getName.endsWith(".thy"))
+      } update_theorems(Path.explode(File.standard_path(file)))
     }
   }
 }