help with modified positional argument

test/test_readme.py

@@ -109,6 +109,26 @@ root:
     assert f.getvalue() == output
 
 
+def test_readme_help_modif():
+    output = """usage: prog.py str [-h] [-v] --str STR
+
+optional arguments:
+  -h, --help       show this help message and exit
+  -v, --verbosity  increase output verbosity
+  --str STR        string option
+"""
+    parser = TiramisuCmdlineParser(get_config(), 'prog.py')
+    f = StringIO()
+    with redirect_stdout(f):
+        try:
+            parser.parse_args(['str', '--help'])
+        except SystemExit as err:
+            assert str(err) == "0"
+        else:
+            raise Exception('must raises')
+    assert f.getvalue() == output
+
+
 def test_readme_positional_mandatory():
     output = """usage: prog.py [-h] [-v] {str,list,int,none}
 prog.py: error: the following arguments are required: cmd
@@ -158,7 +178,7 @@ prog.py: error: the following arguments are required: cmd
 
 
 def test_readme_mandatory():
-    output = """usage: prog.py [-h] [-v] --str STR {str,list,int,none}
+    output = """usage: prog.py str [-h] [-v] --str STR
 prog.py: error: the following arguments are required: --str
 """
     parser = TiramisuCmdlineParser(get_config(), 'prog.py')
@@ -174,7 +194,7 @@ prog.py: error: the following arguments are required: --str
 
 
 def test_readme_mandatory_tree():
-    output = """usage: prog.py [-h] [-v] --root.str STR {str,list,int,none}
+    output = """usage: prog.py str [-h] [-v] --root.str STR
 prog.py: error: the following arguments are required: --root.str
 """
     parser = TiramisuCmdlineParser(get_config(True), 'prog.py')
@@ -190,7 +210,7 @@ prog.py: error: the following arguments are required: --root.str
 
 
 def test_readme_mandatory_tree_flatten():
-    output = """usage: prog.py [-h] [-v] --str STR {str,list,int,none}
+    output = """usage: prog.py str [-h] [-v] --str STR
 prog.py: error: the following arguments are required: --str
 """
     parser = TiramisuCmdlineParser(get_config(True), 'prog.py', fullpath=False)
@@ -206,7 +226,7 @@ prog.py: error: the following arguments are required: --str
 
 
 def test_readme_cross():
-    output = """usage: prog.py [-h] [-v] {str,list,int,none}
+    output = """usage: prog.py none [-h] [-v]
 prog.py: error: unrecognized arguments: --int
 """
     parser = TiramisuCmdlineParser(get_config(), 'prog.py')
@@ -222,7 +242,7 @@ prog.py: error: unrecognized arguments: --int
 
 
 def test_readme_cross_tree():
-    output = """usage: prog.py [-h] [-v] {str,list,int,none}
+    output = """usage: prog.py none [-h] [-v]
 prog.py: error: unrecognized arguments: --int
 """
     parser = TiramisuCmdlineParser(get_config(True), 'prog.py')
@@ -238,7 +258,7 @@ prog.py: error: unrecognized arguments: --int
 
 
 def test_readme_cross_tree_flatten():
-    output = """usage: prog.py [-h] [-v] {str,list,int,none}
+    output = """usage: prog.py none [-h] [-v]
 prog.py: error: unrecognized arguments: --int
 """
     parser = TiramisuCmdlineParser(get_config(True), 'prog.py', fullpath=False)

tiramisu_cmdline_parser/tiramisu_cmdline_parser.py

@@ -182,13 +182,17 @@ class TiramisuCmdlineParser(ArgumentParser):
             if option.issymlinkoption():
                 actions[option.name(follow_symlink=True)][0].insert(0, self._gen_argument(option.name(), properties))
                 continue
+            if _forhelp and not obj.owner.isdefault() and obj.value.get():
+                self.prog += ' {}'.format(obj.value.get())
+            else:
                 if 'positional' in properties:
                     if not 'mandatory' in properties:
                         raise ValueError('"positional" argument must be "mandatory" too')
-                args = [option.path()]
                     if _forhelp:
+                        args = [option.path()]
                         kwargs['default'] = obj.value.default()
                     else:
+                        args = [option.path()]
                         kwargs['default'] = obj.value.get()
                         kwargs['nargs'] = '?'
                 else:
@@ -197,6 +201,7 @@ class TiramisuCmdlineParser(ArgumentParser):
                     args = [self._gen_argument(name, properties)]
                     if _forhelp and 'mandatory' in properties:
                         kwargs['required'] = True
+
                 if option.type() == 'boolean':
                     if 'mandatory' in properties:
                         raise ValueError('"mandatory" property is not allowed for BoolOption')
@@ -279,14 +284,12 @@ class TiramisuCmdlineParser(ArgumentParser):
                                                _forhelp=True)
         return super(TiramisuCmdlineParser, help_formatter).format_usage(*args, **kwargs)
 
-    def format_help(self,
+    def format_help(self):
-                    *args,
-                    **kwargs):
         help_formatter = TiramisuCmdlineParser(self.config,
                                                self.prog,
                                                fullpath=self.fullpath,
                                                _forhelp=True)
-        return super(TiramisuCmdlineParser, help_formatter).format_help(*args, **kwargs)
+        return super(TiramisuCmdlineParser, help_formatter).format_help()
 
     def get_config(self):
         return self.config