fix: special case of auto value with flake8 config

autopep8.py

@@ -3973,13 +3973,18 @@ def parse_args(arguments, apply_config=False):
     return args
 
 
-def _get_normalize_options(config, section, option_list):
-    for (k, _) in config.items(section):
+def _get_normalize_options(args, config, section, option_list):
+    for (k, v) in config.items(section):
         norm_opt = k.lstrip('-').replace('-', '_')
         if not option_list.get(norm_opt):
             continue
         opt_type = option_list[norm_opt]
         if opt_type is int:
+            if v.strip() == "auto":
+                # skip to special case
+                if args.verbose:
+                    print(f"ignore config: {k}={v}")
+                continue
             value = config.getint(section, k)
         elif opt_type is bool:
             value = config.getboolean(section, k)
@@ -4023,8 +4028,9 @@ def read_config(args, parser):
         for section in ['pep8', 'pycodestyle', 'flake8']:
             if not config.has_section(section):
                 continue
-            for norm_opt, k, value in _get_normalize_options(config, section,
-                                                             option_list):
+            for norm_opt, k, value in _get_normalize_options(
+                args, config, section, option_list
+            ):
                 if args.verbose:
                     print("enable config: section={}, key={}, value={}".format(
                         section, k, value))

test/test_autopep8.py

@@ -6135,7 +6135,8 @@ class ConfigurationTests(unittest.TestCase):
     def test_local_config(self):
         args = autopep8.parse_args(
             [os.path.join(FAKE_CONFIGURATION, 'foo.py'),
-             '--global-config={}'.format(os.devnull)],
+             '--global-config={}'.format(os.devnull),
+             '-vvv'],
             apply_config=True)
         self.assertEqual(args.indent_size, 2)
 
@@ -6290,6 +6291,39 @@ def test_pyproject_toml_with_iterable_value(self):
             self.assertTrue(line in output)
             self.assertEqual(p.returncode, autopep8.EXIT_CODE_OK)
 
+    def test_setupcfg_with_flake8_config(self):
+        line = "a =  1\n"
+        fixed = "a = 1\n"
+        setupcfg_flake8 = """[flake8]\njobs=auto\n"""
+        with temporary_project_directory() as dirname:
+            with open(os.path.join(dirname, "setup.cfg"), "w") as fp:
+                fp.write(setupcfg_flake8)
+            target_filename = os.path.join(dirname, "foo.py")
+            with open(target_filename, "w") as fp:
+                fp.write(line)
+            p = Popen(list(AUTOPEP8_CMD_TUPLE) +
+                      [target_filename, "-v"], stdout=PIPE)
+            output = p.communicate()[0].decode("utf-8")
+            self.assertTrue(fixed in output)
+            self.assertTrue("ignore config: jobs=auto" in output)
+            self.assertEqual(p.returncode, autopep8.EXIT_CODE_OK)
+
+    def test_setupcfg_with_pycodestyle_config(self):
+        line = "a =  1\n"
+        fixed = "a = 1\n"
+        setupcfg_flake8 = """[pycodestyle]\ndiff=True\nignore="E,W"\n"""
+        with temporary_project_directory() as dirname:
+            with open(os.path.join(dirname, "setup.cfg"), "w") as fp:
+                fp.write(setupcfg_flake8)
+            target_filename = os.path.join(dirname, "foo.py")
+            with open(target_filename, "w") as fp:
+                fp.write(line)
+            p = Popen(list(AUTOPEP8_CMD_TUPLE) +
+                      [target_filename, "-v"], stdout=PIPE)
+            output = p.communicate()[0].decode("utf-8")
+            self.assertTrue(fixed in output)
+            self.assertEqual(p.returncode, autopep8.EXIT_CODE_OK)
+
 
 class ExperimentalSystemTests(unittest.TestCase):