move main linters to ruff

nested_diff/__init__.py

@@ -101,11 +101,11 @@ class Differ:
     def __init__(
         self,
         A=True,  # noqa: N803
-        N=True,
-        O=True,  # noqa: E741
-        R=True,
-        U=True,
-        trimR=False,
+        N=True,  # noqa: N803
+        O=True,  # noqa: E741 N803
+        R=True,  # noqa: N803
+        U=True,  # noqa: N803
+        trimR=False,  # noqa: N803
         dumper=None,
         handlers=None,
     ):

nested_diff/cli.py

@@ -237,7 +237,7 @@ def run(self):
         Raises:
             NotImplementedError: Must be implemented in derivatives.
 
-        """  # noqa: D406
+        """
         raise NotImplementedError
 
 
@@ -257,7 +257,7 @@ def __init__(self, header='', footer=''):
         self.header = header
         self.footer = footer
 
-    def encode(self, data):  # noqa U100
+    def encode(self, data):
         """Encode data.
 
         Args:
@@ -293,7 +293,7 @@ def dump(self, file_, data):
 class Loader:
     """Base class for data loaders."""
 
-    def decode(self, data):  # noqa U100
+    def decode(self, data):
         """Decode data.
 
         Args:

nested_diff/diff_tool.py

@@ -72,11 +72,10 @@ def generate_diffs(self):
         if self.args.show:
             if len(self.args.files) > 1:
                 headers_enabled = True
-        else:
-            if len(self.args.files) < 2:
-                self.argparser.error('Two or more arguments expected for diff')
-            elif len(self.args.files) > 2:
-                headers_enabled = True
+        elif len(self.args.files) < 2:
+            self.argparser.error('Two or more arguments expected for diff')
+        elif len(self.args.files) > 2:
+            headers_enabled = True
 
         for file_ in self.args.files:
             header = ''
@@ -308,7 +307,7 @@ def encode(self, data):
     def get_formatter_class(self, base_class, values='repr'):
         """Return formatter class."""
 
-        class __Formatter(base_class):
+        class _Formatter(base_class):
             def __init__(self, *args, **kwargs):
                 super().__init__(*args, **kwargs)
 
@@ -328,14 +327,14 @@ def __init__(self, *args, **kwargs):
 
                 self.generate_value = self.generate_multiline_value
 
-            def generate_empty_value(*args):  # noqa U101
+            def generate_empty_value(*args):  # noqa: ARG002
                 yield ''
 
             def generate_multiline_value(self, value, tag, depth):
                 for line in self.__val_encoder.encode(value).splitlines():
                     yield from super().generate_string(line, tag, depth)
 
-        return __Formatter
+        return _Formatter
 
     @staticmethod
     def get_opts(opts):

nested_diff/formatters.py

@@ -98,7 +98,7 @@ def __init__(
         for handler in handlers:
             self.set_handler(handler)
 
-    def format(self, diff, **kwargs):  # noqa A003
+    def format(self, diff, **kwargs):
         """Return formatted diff as string."""
         return ''.join(self.generate_diff(diff, **kwargs))
 

nested_diff/handlers.py

@@ -59,7 +59,7 @@ def diff(self, differ, a, b):
 
         return equal, diff
 
-    def patch(self, patcher, target, diff):  # noqa U100
+    def patch(self, patcher, target, diff):  # noqa: ARG002
         """Patch object.
 
         Args:
@@ -82,7 +82,7 @@ def patch(self, patcher, target, diff):  # noqa U100
 
         raise ValueError(diff)
 
-    def iterate_diff(self, iterator, diff):  # noqa U100
+    def iterate_diff(self, iterator, diff):  # noqa: ARG002
         """Iterate over nested diff.
 
         Args:
@@ -432,7 +432,7 @@ def patch(self, patcher, target, diff):
 
         return target
 
-    def iterate_diff(self, iterator, diff):  # noqa U100
+    def iterate_diff(self, iterator, diff):  # noqa: ARG002
         """Iterate over nested diff.
 
         Args:
@@ -443,7 +443,7 @@ def iterate_diff(self, iterator, diff):  # noqa U100
             Tuples with diff, key and subdiff for each nested diff.
 
         """
-        idx = 0  # noqa SIM113
+        idx = 0
 
         for item in diff['D']:
             try:
@@ -457,7 +457,7 @@ def iterate_diff(self, iterator, diff):  # noqa U100
 
     def generate_formatted_diff(self, formatter, diff, depth):
         """Generate formatted list diff."""
-        idx = 0  # noqa SIM113
+        idx = 0
 
         for subdiff in diff['D']:
             try:
@@ -583,7 +583,7 @@ def diff(self, differ, a, b):
 
         return equal, {}
 
-    def patch(self, patcher, target, diff):  # noqa U100
+    def patch(self, patcher, target, diff):  # noqa: ARG002
         """Patch set object.
 
         Args:
@@ -722,7 +722,7 @@ def diff(self, differ, a, b):
 
         return equal, {'U': a} if differ.op_u else {}
 
-    def patch(self, patcher, target, diff):  # noqa U100
+    def patch(self, patcher, target, diff):  # noqa: ARG002
         """Patch text (multiline string).
 
         Unlike GNU patch, this algorithm does not implement any heuristics and
@@ -775,7 +775,7 @@ def generate_formatted_diff(self, formatter, diff, depth):
 
                 if tag == 'I':
                     yield from formatter.generate_string(
-                        '@@ -{} +{} @@'.format(
+                        '@@ -{} +{} @@'.format(  # noqa: UP032
                             self._get_hunk_range(value[0], value[1]),
                             self._get_hunk_range(value[2], value[3]),
                         ),

pyproject.toml

@@ -50,25 +50,12 @@ cli = [
 ]
 lint = [
     'darglint',
-    'flake8 < 5',  # temp workaround (https://github.com/tholo/pytest-flake8/issues/87)
-    'flake8-builtins',
-    'flake8-bugbear',
-    'flake8-commas',
-    'flake8-comprehensions',
-    'flake8-docstrings',
-    'flake8-eradicate',
-    'flake8-pytest-style',
-    'flake8_quotes',
-    'flake8-return',
-    'flake8-unused-arguments',
-    'pep8-naming',
-    'pytest-flake8',
 ]
 test = [
     'pytest',
     'pytest-cov',
     'pytest-ruff',
-    'ruff==0.3.0',  # pin for reproducible results
+    'ruff==0.4.10',
 ]
 
 [project.scripts]
@@ -99,22 +86,57 @@ extend-exclude = [
 ]
 line-length = 79
 
-[tool.ruff.extend-per-file-ignores]
-'tests/*' = [
-    'D',  # docstrings
-]
-
 [tool.ruff.format]
 docstring-code-format = true
 quote-style = 'single'
 
 [tool.ruff.lint]
 select = [
+    'A',
+    'ARG',
+    'B',
+    'BLE',
+    'C4',
+    'COM',
     'D',
-    'E501',
+    'DTZ',
+    'E',
+    'ERA',
+    'EXE',
+#    'FBT',  # TODO
+    'FLY',
+    'G',
+    'ICN',
+    'ISC',
+    'LOG',
+    'N',
+    'PGH',
+    'PIE',
+    'PT',
+#    'PL',  # TODO
+    'PLE',
+    'Q',
+    'RET',
+    'RSE',
+    'RUF',
     'SIM',
+    'SLF',
+    'TD',
+    'UP',
+    'W',
 ]
 ignore = [
     'D407',  # Missing dashed underline after section
     'SIM105',  # contextlib.suppress is slower than try-except-pass
 ]
+
+[tool.ruff.lint.extend-per-file-ignores]
+'tests/*' = [
+    'D',  # docstrings
+]
+
+[tool.ruff.lint.flake8-quotes]
+inline-quotes = 'single'
+
+[tool.ruff.lint.pydocstyle]
+convention = 'google'

tests/cli/test_diff_tool.py

@@ -41,7 +41,7 @@ def test_default_diff_with_tty(capsys, expected, rpath):
 
 def test_diff_method_kwargs_override(capsys, expected, rpath):
     class TestApp(nested_diff.diff_tool.App):
-        def diff(self, a, b, **kwargs):  # noqa U100
+        def diff(self, a, b, **kwargs):  # noqa: ARG002
             return super().diff(a, b, A=0, U=1)
 
     exit_code = TestApp(
@@ -62,7 +62,7 @@ def diff(self, a, b, **kwargs):  # noqa U100
     assert captured.out == expected
 
 
-def test_enable_U_ops(capsys, expected, rpath):  # noqa N802
+def test_enable_U_ops(capsys, expected, rpath):  # noqa: N802
     exit_code = nested_diff.diff_tool.App(
         args=(
             rpath('shared.lists.a.json'),
@@ -82,7 +82,7 @@ def test_enable_U_ops(capsys, expected, rpath):  # noqa N802
     assert captured.out == expected
 
 
-def test_trimR_ops(capsys, expected, rpath):  # noqa N802
+def test_trimR_ops(capsys, expected, rpath):  # noqa: N802
     exit_code = nested_diff.diff_tool.App(
         args=(
             rpath('shared.lists.b.json'),
@@ -396,13 +396,13 @@ def test_yaml_ofmt(capsys, expected, rpath):
 def test_python_yaml_impl(capsys, expected, rpath):
     orig_import = builtins.__import__
 
-    def overridden_import(name, globals, locals, fromlist, level):  # noqa A002
+    def overridden_import(name, globals, locals, fromlist, level):  # noqa: A002
         if name == 'yaml' and fromlist is not None:
             for sym in ('CSafeDumper', 'CSafeLoader'):
                 if sym in fromlist:
                     raise ImportError(f'Mocked import error for yaml.{sym}')
 
-        return orig_import(name, globals, locals, fromlist, level)  # noqa A002
+        return orig_import(name, globals, locals, fromlist, level)
 
     with mock.patch('builtins.__import__', overridden_import):
         exit_code = nested_diff.diff_tool.App(
@@ -482,7 +482,7 @@ def test_exit_code_diff_absent(rpath):
     assert exit_code == 0
 
 
-def test_exit_code_diff_absent_U_opt_enabled(rpath):  # noqa N802
+def test_exit_code_diff_absent_U_opt_enabled(rpath):  # noqa: N802
     exit_code = nested_diff.diff_tool.App(
         args=(
             rpath('shared.lists.a.json'),

tests/common.py

@@ -18,7 +18,7 @@ def iterate_test_suite(tests_map, results_mod, func):
             try:
                 test['result'] = func(test)
                 results_map[name] = {'result': test['result']}
-            except Exception as e:
+            except Exception as e:  # noqa: BLE001
                 results_map[name] = {
                     'raises': e if type(e) is type else type(e),
                 }

tests/conftest.py

@@ -7,7 +7,7 @@
 pytest.register_assert_rewrite('tests.common')
 
 
-@pytest.fixture
+@pytest.fixture()
 def content():
     def _reader(filename):
         with open(filename) as f:
@@ -16,7 +16,7 @@ def _reader(filename):
     return _reader
 
 
-@pytest.fixture
+@pytest.fixture()
 def expected(request):
     filename = os.path.splitext(request.module.__file__)[0]
     filename += f'.{request.function.__name__}.exp'
@@ -25,7 +25,7 @@ def expected(request):
         return f.read()
 
 
-@pytest.fixture
+@pytest.fixture()
 def rpath(request):
     def _path_resolver(filename):
         path = os.path.join(
@@ -41,7 +41,7 @@ def _path_resolver(filename):
     return _path_resolver
 
 
-@pytest.fixture
+@pytest.fixture()
 def stringio():
     return StringIO()
 
@@ -51,6 +51,6 @@ def isatty(self):
         return True
 
 
-@pytest.fixture
+@pytest.fixture()
 def stringio_tty():
     return _StringIOTTY()

tests/data/gen_html_compare.py

@@ -21,15 +21,15 @@ def main():
 
         try:
             txt = TextFormatter(**fmt_obj_opts).format(diff)
-        except Exception as e:
-            txt = f'<div class="error">ERROR: {str(e)}</div>'
+        except Exception as e:  # noqa: BLE001
+            txt = f'<div class="error">ERROR: {e}</div>'
         else:
             txt = f'<pre>{html.escape(txt)}</pre>'
 
         try:
             htm = HtmlFormatter(**fmt_obj_opts).format(diff)
-        except Exception as e:
-            htm = f'<div class="error">ERROR: {str(e)}</div>'
+        except Exception as e:  # noqa: BLE001
+            htm = f'<div class="error">ERROR: {e}</div>'
 
         print(f'<tr><td colspan=2 class="label">{name}</td></tr>')
         print(f'<tr><td>{txt}</td>')

tests/data/gen_standard.py

@@ -32,7 +32,7 @@ def generate_tests(source_dir=sys.argv[1]):
                     test_opts['trimR'] = True
 
         if 'patched' in data:
-            patched = f"\n            'patched': {repr(data['patched'])},"
+            patched = f"\n            'patched': {data['patched']!r},"
         else:
             patched = ''