Fix cases where a suppressed default was visible (#53)

Co-authored-by: Adam Turner <9087854+aa-turner@users.noreply.github.com>

.ruff.toml

@@ -30,6 +30,9 @@ ignore = [
 ]
 
 [lint.per-file-ignores]
+"test/sample-default-supressed.py" = [
+    "N999",  # invalid module name
+]
 "test/sample-directive-opts.py" = [
     "N999",  # invalid module name
 ]

sphinxarg/ext.py

@@ -86,6 +86,14 @@ def render_list(l, markdown_help, settings=None):
         return all_children
 
 
+def _is_suppressed(item):
+    """Return whether item should not be printed."""
+    if item is None:
+        return True
+    item = str(item).replace('"', '').replace("'", '')
+    return item == '==SUPPRESS=='
+
+
 def print_action_groups(
     data,
     nested_content,
@@ -151,10 +159,7 @@ def print_action_groups(
                     )
                 if 'help' in entry:
                     arg.append(entry['help'])
-                if entry['default'] is not None and entry['default'] not in [
-                    '"==SUPPRESS=="',
-                    '==SUPPRESS==',
-                ]:
+                if not _is_suppressed(entry['default']):
                     # Put the default value in a literal block,
                     # but escape backticks already in the string
                     default_str = str(entry['default']).replace('`', r'\`')
@@ -414,10 +419,7 @@ def _format_optional_arguments(self, parser_info):
             opt_items = []
             for name in opt['name']:
                 option_declaration = [nodes.option_string(text=name)]
-                if opt['default'] is not None and opt['default'] not in [
-                    '"==SUPPRESS=="',
-                    '==SUPPRESS==',
-                ]:
+                if not _is_suppressed(opt['default']):
                     option_declaration += nodes.option_argument(
                         '', text='=' + str(opt['default'])
                     )

test/roots/test-default-html/default-suppressed.rst

@@ -0,0 +1,7 @@
+Default suppressed
+==================
+
+.. argparse::
+   :filename: test/sample-default-supressed.py
+   :prog: sample-default-suppressed
+   :func: get_parser

test/sample-default-supressed.py

@@ -0,0 +1,11 @@
+from argparse import ArgumentParser
+
+
+def get_parser():
+    parser = ArgumentParser(
+        prog='sample-default-suppressed', description='Test suppression of version default'
+    )
+    parser.add_argument(
+        '--version', help='print version number', action='version', version='1.2.3'
+    )
+    return parser

test/test_default_html.py

@@ -31,14 +31,18 @@ def get_text(node):
         if be_found:
             if any(rex.search(get_text(node)) for node in nodes):
                 return
+            msg = (
+                f'{check!r} not found in any node matching path {path} in {fname}: '
+                f'{[node.text for node in nodes]!r}'
+            )
         else:
             if all(not rex.search(get_text(node)) for node in nodes):
                 return
+            msg = (
+                f'Found {check!r} in a node matching path {path} in {fname}: '
+                f'{[node.text for node in nodes]!r}'
+            )
 
-        msg = (
-            f'{check!r} not found in any node matching path {path} in {fname}: '
-            f'{[node.text for node in nodes]!r}'
-        )
         raise AssertionError(msg)
 
 
@@ -82,6 +86,15 @@ def get_text(node):
                 ('.//section/dl/dd/p/code/span', r"\['\*.rst',"),
             ],
         ),
+        (
+            'default-suppressed.html',
+            [
+                ('.//h1', 'Sample', False),
+                ('.//h1', 'Default suppressed'),
+                ('.//h2', 'Named Arguments'),
+                ('.//section/dl/dd/p', 'Default', False),
+            ],
+        ),
     ],
 )
 @pytest.mark.sphinx('html', testroot='default-html')