[PATCH 6/9] docs: maintainers_include: do some coding style cleanups

[Mauro Carvalho Chehab]

Minor coding style adjustments to use the style most python
doc scripts are following.

No functional changes.

Assisted-by: pylint, black
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
---
 Documentation/sphinx/maintainers_include.py | 101 ++++++++++----------
 1 file changed, 51 insertions(+), 50 deletions(-)

diff --git a/Documentation/sphinx/maintainers_include.py b/Documentation/sphinx/maintainers_include.py
index 1d7d441e281c..189f22e5fae4 100755
--- a/Documentation/sphinx/maintainers_include.py
+++ b/Documentation/sphinx/maintainers_include.py
@@ -1,30 +1,25 @@
 #!/usr/bin/env python
 # SPDX-License-Identifier: GPL-2.0
 # -*- coding: utf-8; mode: python -*-
-# pylint: disable=R0903, C0330, R0914, R0912, E0401
+# pylint: disable=C0209, C0301, E0401, R0022, R0902, R0903, R0912, R0914
 
 """
-    maintainers-include
-    ~~~~~~~~~~~~~~~~~~~
+Implementation of the ``maintainers-include`` reST-directive.
 
-    Implementation of the ``maintainers-include`` reST-directive.
+:copyright:  Copyright (C) 2019  Kees Cook <keescook@xxxxxxxxxxxx>
+:license:    GPL Version 2, June 1991 see linux/COPYING for details.
 
-    :copyright:  Copyright (C) 2019  Kees Cook <keescook@xxxxxxxxxxxx>
-    :license:    GPL Version 2, June 1991 see linux/COPYING for details.
-
-    The ``maintainers-include`` reST-directive performs extensive parsing
-    specific to the Linux kernel's standard "MAINTAINERS" file, in an
-    effort to avoid needing to heavily mark up the original plain text.
+The ``maintainers-include`` reST-directive performs extensive parsing
+specific to the Linux kernel's standard "MAINTAINERS" file, in an
+effort to avoid needing to heavily mark up the original plain text.
 """
 
-import sys
-import re
 import os.path
+import re
 
 from glob import glob
 
 from docutils import statemachine
-from docutils.parsers.rst import Directive
 from docutils.parsers.rst.directives.misc import Include
 
 #
@@ -32,12 +27,14 @@ from docutils.parsers.rst.directives.misc import Include
 #
 KERNELDOC_URL = "https://docs.kernel.org/";
 
-def ErrorString(exc):  # Shamelessly stolen from docutils
-    return f'{exc.__class__.__name}: {exc}'
+__version__ = "1.0"
 
-__version__  = '1.0'
+maint_parser = None  # pylint: disable=C0103
 
-maint_parser = None
+
+# Shamelessly stolen from docutils
+def ErrorString(exc):  # pylint: disable=C0103, C0116
+    return f"{exc.__class__.__name}: {exc}"  # pylint: disable=W0212
 
 class MaintainersParser:
     """Parse MAINTAINERS file(s) content"""
@@ -52,7 +49,7 @@ class MaintainersParser:
 
         # Field letter to field name mapping.
         self.field_letter = None
-        self.fields = dict()
+        self.fields = {}
 
         self.field_prev = ""
         self.field_content = ""
@@ -71,29 +68,30 @@ class MaintainersParser:
         self.output = ".. _maintainers:\n\n"
 
         prev = None
-        for line in open(path):
-            if self.descriptions:
-                self.parse_descriptions(line)
-            elif self.maintainers and not self.subsystems:
-                if re.search('^[A-Z0-9]', line):
-                    self.subsystems = True
+        with open(path, "r", encoding="utf-8") as fp:
+            for line in fp:
+                if self.descriptions:
+                    self.parse_descriptions(line)
+                elif self.maintainers and not self.subsystems:
+                    if re.search('^[A-Z0-9]', line):
+                        self.subsystems = True
+                        self.parse_subsystems(line)
+                    else:
+                        self.output += line
+                elif self.subsystems:
                     self.parse_subsystems(line)
                 else:
                     self.output += line
-            elif self.subsystems:
-                self.parse_subsystems(line)
-            else:
-                self.output += line
 
-            # Update the state machine when we find heading separators.
-            if line.startswith('----------'):
-                if prev.startswith('Descriptions'):
-                    self.descriptions = True
-                if prev.startswith('Maintainers'):
-                    self.maintainers = True
+                # Update the state machine when we find heading separators.
+                if line.startswith("----------"):
+                    if prev.startswith("Descriptions"):
+                        self.descriptions = True
+                    if prev.startswith("Maintainers"):
+                        self.maintainers = True
 
-            # Retain previous line for state machine transitions.
-            prev = line
+                # Retain previous line for state machine transitions.
+                prev = line
 
         # Flush pending field contents.
         if self.field_content:
@@ -132,7 +130,7 @@ class MaintainersParser:
         """Handle contents of the descriptions section."""
 
         # Have we reached the end of the preformatted Descriptions text?
-        if line.startswith('Maintainers'):
+        if line.startswith("Maintainers"):
             self.descriptions = False
             self.output += "\n" + line
             return
@@ -185,7 +183,7 @@ class MaintainersParser:
         # Render a subsystem field as:
         #   :Field: entry
         #           entry...
-        field, details = line.split(':', 1)
+        field, details = line.split(":", 1)
         details = details.strip()
 
         #
@@ -246,12 +244,11 @@ class MaintainersParser:
 
 class MaintainersInclude(Include):
     """MaintainersInclude (``maintainers-include``) directive"""
+
     required_arguments = 0
 
     def emit(self):
         """Parse all the MAINTAINERS lines into ReST for human-readability"""
-        global maint_parser
-
         path = maint_parser.path
         output = maint_parser.output
 
@@ -267,20 +264,21 @@ class MaintainersInclude(Include):
             raise self.warning('"%s" directive disabled.' % self.name)
 
         try:
-            lines = self.emit()
+            self.emit()
         except IOError as error:
             raise self.severe('Problems with "%s" directive path:\n%s.' %
                       (self.name, ErrorString(error)))
 
         return []
 
+
 class MaintainersProfile(Include):
+    """Generate a list with all maintainer's profiles"""
+
     required_arguments = 0
 
     def emit(self):
         """Parse all the MAINTAINERS lines looking for profile entries"""
-        global maint_parser
-
         path = maint_parser.path
 
         #
@@ -317,15 +315,17 @@ class MaintainersProfile(Include):
             raise self.warning('"%s" directive disabled.' % self.name)
 
         try:
-            lines = self.emit()
+            self.emit()
         except IOError as error:
             raise self.severe('Problems with "%s" directive path:\n%s.' %
                       (self.name, ErrorString(error)))
 
         return []
 
+
 def setup(app):
-    global maint_parser
+    """Setup Sphinx exension"""
+    global maint_parser  # pylint: disable=W0603
 
     #
     # NOTE: we're using os.fspath() here because of a Sphinx warning:
@@ -339,8 +339,9 @@ def setup(app):
 
     app.add_directive("maintainers-include", MaintainersInclude)
     app.add_directive("maintainers-profile-toc", MaintainersProfile)
-    return dict(
-        version = __version__,
-        parallel_read_safe = True,
-        parallel_write_safe = True
-    )
+
+    return {
+        "version": __version__,
+        "parallel_read_safe": True,
+        "parallel_write_safe": True,
+    }
-- 
2.54.0