From: W. Trevor King <wking@drexel.edu>
Date: Wed, 12 May 2010 12:05:48 +0000 (-0400)
Subject: Added Argument.count handling to hooke.ui.commandline.
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=c10464cc037e7e29d54b295b4648ec548b95ab36;p=hooke.git

Added Argument.count handling to hooke.ui.commandline.
---

diff --git a/hooke/ui/commandline.py b/hooke/ui/commandline.py
index 5198f8f..0c08d39 100644
--- a/hooke/ui/commandline.py
+++ b/hooke/ui/commandline.py
@@ -38,6 +38,14 @@ class CommandLineParser (optparse.OptionParser):
                 self.command_opts.append(a)
             else:
                 self.command_args.append(a)
+        infinite_counters = [a for a in self.command_args if a.count == -1]
+        assert len(infinite_counters) <= 1, \
+            'Multiple infinite counts for %s: %s\nNeed a better CommandLineParser implementation.' \
+            % (command.name, ', '.join([a.name for a in infinite_counters]))
+        if len(infinite_counters) == 1: # move the big counter to the end.
+            infinite_counter = infinite_counters[0]
+            self.command_args.remove(infinite_counter)
+            self.command_args.append(infinite_counter)
 
     def exit(self, status=0, msg=None):
         """Override :meth:`optparse.OptionParser.exit` which calls
@@ -91,20 +99,53 @@ class DoCommand (CommandMethod):
     def _parse_args(self, args):
         argv = shlex.split(args, comments=True, posix=True)
         options,args = self.parser.parse_args(argv)
-        if len(args) != len(self.parser.command_args):
-            raise optparse.OptParseError('%d arguments given, but %s takes %d'
-                                         % (len(args),
-                                            self.name_fn(self.command.name),
-                                            len(self.parser.command_args)))
+        self._check_argument_length_bounds(args)
         params = {}
         for argument in self.parser.command_opts:
             value = getattr(options, self.name_fn(argument.name))
             if value != Default:
                 params[argument.name] = value
-        for i,argument in enumerate(self.parser.command_args):
-            params[argument.name] = args[i]
+        arg_index = 0
+        for argument in self.parser.command_args:
+            if argument.count == 1:
+                params[argument.name] = args[arg_index]
+            elif argument.count > 1:
+                params[argument.name] = \
+                    args[arg_index:arg_index+argument.count]
+            else: # argument.count == -1:
+                params[argument.name] = args[arg_index:]
+            arg_index += argument.count
         return params
 
+    def _check_argument_length_bounds(self, arguments):
+        """Check that there are an appropriate number of arguments in
+        `args`.
+
+        If not, raise optparse.OptParseError().
+        """
+        min_args = 0
+        max_args = -1
+        for argument in self.parser.command_args:
+            if argument.optional == False and argument.count > 0:
+                min_args += argument.count
+            if max_args >= 0: # otherwise already infinite
+                if argument.count == -1:
+                    max_args = -1
+                else:
+                    max_args += argument.count
+        if len(arguments) < min_args \
+                or (max_args >= 0 and len(arguments) > max_args):
+            if min_args == max_args:
+                target_string = str(min_args)
+            elif max_args == -1:
+                target_string = 'more than %d' % min_args
+            else:
+                target_string = '%d to %d' % (min_args, max_args)
+            raise optparse.OptParseError(
+                '%d arguments given, but %s takes %s'
+                % (len(arguments), self.name_fn(self.command.name),
+                   target_string))
+
     def _boolean_request(self, msg):
         if msg.default == True:
             yn = ' [Y/n] '