fix: exit code is non-zero value when occur io error

autopep8.py

@@ -4324,6 +4324,7 @@ def _fix_file(parameters):
         return fix_file(*parameters)
     except IOError as error:
         print(unicode(error), file=sys.stderr)
+        raise error
 
 
 def fix_multiple_files(filenames, options, output=None):
@@ -4337,12 +4338,17 @@ def fix_multiple_files(filenames, options, output=None):
     if options.jobs > 1:
         import multiprocessing
         pool = multiprocessing.Pool(options.jobs)
-        ret = pool.map(_fix_file, [(name, options) for name in filenames])
+        rets = []
+        for name in filenames:
+            ret = pool.apply_async(_fix_file, ((name, options),))
+            rets.append(ret)
+        pool.close()
+        pool.join()
         if options.diff:
-            for r in ret:
-                sys.stdout.write(r.decode())
+            for r in rets:
+                sys.stdout.write(r.get().decode())
                 sys.stdout.flush()
-        results.extend([x for x in ret if x is not None])
+        results.extend([x.get() for x in rets if x is not None])
     else:
         for name in filenames:
             ret = _fix_file((name, options, output))
@@ -4458,6 +4464,8 @@ def main(argv=None, apply_config=True):
                 ret = any([ret is not None for ret in results])
             if args.exit_code and ret:
                 return EXIT_CODE_EXISTS_DIFF
+    except IOError:
+        return EXIT_CODE_ERROR
     except KeyboardInterrupt:
         return EXIT_CODE_ERROR  # pragma: no cover
 

test/test_autopep8.py

@@ -19,6 +19,7 @@
 import contextlib
 import io
 import shutil
+import stat
 from subprocess import Popen, PIPE
 from tempfile import mkstemp, mkdtemp
 import tokenize
@@ -5503,6 +5504,15 @@ def test_diff_with_standard_in(self):
         error = p.communicate()[1].decode('utf-8')
         self.assertIn('cannot', error)
 
+    def test_exit_code_with_io_error(self):
+        line = "import sys\ndef a():\n    print(1)\n"
+        with readonly_temporary_file_context(line) as filename:
+            print(filename)
+            p = Popen(list(AUTOPEP8_CMD_TUPLE) + ['--in-place', filename],
+                      stdout=PIPE, stderr=PIPE)
+            result = p.communicate()
+            self.assertEqual(p.returncode, 1)
+
     def test_pep8_passes(self):
         line = "'abc'  \n"
         fixed = "'abc'\n"
@@ -5671,6 +5681,28 @@ def test_parallel_jobs_with_diff_option(self):
                 for actual_diff in actual_diffs:
                     self.assertIn(actual_diff, output)
 
+    def test_parallel_jobs_with_inplace_option_and_io_error(self):
+        temp_directory = mkdtemp(dir='.')
+        try:
+            file_a = os.path.join(temp_directory, 'a.py')
+            with open(file_a, 'w') as output:
+                output.write("'abc'  \n")
+            os.chmod(file_a, stat.S_IRUSR)  # readonly
+
+            os.mkdir(os.path.join(temp_directory, 'd'))
+            file_b = os.path.join(temp_directory, 'd', 'b.py')
+            with open(file_b, 'w') as output:
+                output.write('123  \n')
+            os.chmod(file_b, stat.S_IRUSR)
+
+            p = Popen(list(AUTOPEP8_CMD_TUPLE) +
+                      [temp_directory, '--recursive', '--in-place'],
+                      stdout=PIPE, stderr=PIPE)
+            result = p.communicate()[0].decode('utf-8')
+            self.assertEqual(p.returncode, 1)
+        finally:
+            shutil.rmtree(temp_directory)
+
     def test_parallel_jobs_with_automatic_cpu_count(self):
         line = "'abc'  \n"
         fixed = "'abc'\n"
@@ -7363,6 +7395,19 @@ def temporary_file_context(text, suffix='', prefix=''):
     os.remove(temporary[1])
 
 
+@contextlib.contextmanager
+def readonly_temporary_file_context(text, suffix='', prefix=''):
+    temporary = mkstemp(suffix=suffix, prefix=prefix)
+    os.close(temporary[0])
+    with autopep8.open_with_encoding(temporary[1],
+                                     encoding='utf-8',
+                                     mode='w') as temp_file:
+        temp_file.write(text)
+    os.chmod(temporary[1], stat.S_IRUSR)
+    yield temporary[1]
+    os.remove(temporary[1])
+
+
 @contextlib.contextmanager
 def temporary_project_directory(prefix="autopep8test"):
     temporary = mkdtemp(prefix=prefix)