rid of init_parser

kamaki/cli/__init__.py

@@ -36,8 +36,8 @@ from sys import argv, exit, stdout
 from os.path import basename
 from inspect import getargspec
 
-from kamaki.cli.argument import _arguments, parse_known_args, init_parser,\
-    update_arguments
+from kamaki.cli.argument import _arguments, parse_known_args, update_arguments
+# init_parser,
 from kamaki.cli.history import History
 from kamaki.cli.utils import print_dict, print_list, red, magenta, yellow
 from kamaki.cli.errors import CLIError
@@ -409,11 +409,15 @@ def run_shell(exe_string, arguments):
     shell.run(arguments)
 
 
+from kamaki.cli.argument import ArgumentParseManager
+
+
 def main():
     try:
         exe = basename(argv[0])
-        parser = init_parser(exe, _arguments)
-        parsed, unparsed = parse_known_args(parser, _arguments)
+        #parser = init_parser(exe, _arguments)
+        parser = ArgumentParseManager(exe)
+        parsed, unparsed = parse_known_args(parser.parser, parser.arguments)
 
         if _arguments['version'].value:
             exit(0)
@@ -423,9 +427,9 @@ def main():
         if unparsed:
             _history = History(_arguments['config'].get('history', 'file'))
             _history.add(' '.join([exe] + argv[1:]))
-            one_cmd(parser, unparsed, _arguments)
+            one_cmd(parser.parser, unparsed, parser.arguments)
         elif _help:
-            parser.print_help()
+            parser.parser.print_help()
             _groups_help(_arguments)
         else:
             run_shell(exe, _arguments)

kamaki/cli/argument.py

@@ -353,12 +353,59 @@ Mechanism:
 """
 
 
+class ArgumentParseManager():
+    """Manage (initialize and update) an ArgumentParser object"""
+
+    parser = ArgumentParser(add_help=False)
+    arguments = None
+
+    def __init__(self, exe, arguments=None):
+        """
+        :param exe: (str) the basic command (e.g. 'kamaki')
+
+        :param arguments: (dict) if given, overrides the global _argument as
+            the parsers arguments specification
+        """
+        if arguments:
+            self.arguments = arguments
+        else:
+            global _arguments
+            self.arguments = _arguments
+
+        self.syntax = '%s <cmd_group> [<cmd_subbroup> ...] <cmd>' % exe
+        self.update_parser()
+
+    @property
+    def syntax(self):
+        return self.parser.prog
+
+    @syntax.setter
+    def syntax(self, new_syntax):
+        self.parser.prog = new_syntax
+
+    def update_parser(self, arguments=None):
+        """Load argument specifications to parser
+
+        :param arguments: if not given, update self.arguments instead
+        """
+        if not arguments:
+            arguments = self.arguments
+
+        for name, arg in arguments.items():
+            try:
+                arg.update_parser(self.parser, name)
+            except ArgumentError:
+                pass
+
+
+"""
 def init_parser(exe, arguments):
-    """Create and initialize an ArgumentParser object"""
+    ""Create and initialize an ArgumentParser object""
     parser = ArgumentParser(add_help=False)
     parser.prog = '%s <cmd_group> [<cmd_subbroup> ...] <cmd>' % exe
     update_arguments(parser, arguments)
     return parser
+"""
 
 
 def parse_known_args(parser, arguments=None):