OVMS3-idf/tools/kconfig_new/gen_kconfig_doc.py
2019-09-11 14:42:05 +02:00

175 lines
6.1 KiB
Python

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# gen_kconfig_doc - confgen.py support for generating ReST markup documentation
#
# For each option in the loaded Kconfig (e.g. 'FOO'), CONFIG_FOO link target is
# generated, allowing options to be referenced in other documents
# (using :ref:`CONFIG_FOO`)
#
# Copyright 2017-2018 Espressif Systems (Shanghai) PTE LTD
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http:#www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import sys
try:
from . import kconfiglib
except Exception:
sys.path.insert(0, os.path.dirname(os.path.realpath(__file__)))
import kconfiglib
# Indentation to be used in the generated file
INDENT = ' '
# Characters used when underlining section heading
HEADING_SYMBOLS = '*=-^#'
# Keep the heading level in sync with api-reference/kconfig.rst
INITIAL_HEADING_LEVEL = 2
MAX_HEADING_LEVEL = len(HEADING_SYMBOLS)-1
def write_docs(config, filename):
""" Note: writing .rst documentation ignores the current value
of any items. ie the --config option can be ignored.
(However at time of writing it still needs to be set to something...) """
with open(filename, "w") as f:
config.walk_menu(lambda node: write_menu_item(f, node))
def get_breadcrumbs(node):
# this is a bit wasteful as it recalculates each time, but still...
result = []
node = node.parent
while node.parent:
if node_is_menu(node) and node.prompt:
result = [ node.prompt[0] ] + result
node = node.parent
return " > ".join(result)
def get_heading_level(node):
# bit wasteful also
result = INITIAL_HEADING_LEVEL
node = node.parent
while node.parent:
# Test for 'Component config' is a hack so component config doesn't bury all
# the components under it in the hierarchy
if node_is_menu(node) and node.prompt[0] != "Component config":
result += 1
if result == MAX_HEADING_LEVEL:
return MAX_HEADING_LEVEL
node = node.parent
return result
def format_rest_text(text, indent):
# Format an indented text block for use with ReST
text = indent + text.replace('\n', '\n' + indent)
# Escape some characters which are inline formatting in ReST
text = text.replace("*", "\\*")
text = text.replace("_", "\\_")
text += '\n'
return text
def node_is_menu(node):
try:
return node.item == kconfiglib.MENU or node.is_menuconfig
except AttributeError:
return False # not all MenuNodes have is_menuconfig for some reason
def should_print_preview_links(node):
"""
Return True if we should print the preview links. For each menu,
the menu with the preview links is the top menu which contains
actual configuration items.
"""
child = node.list
while child:
if not node_is_menu(child) and child.prompt:
# we have a non-menu child, so return true if we don't have
# a parent which already returned true
return node.parent is None or not should_print_preview_links(node.parent)
child = child.next
return False
def write_menu_item(f, node):
if not node.prompt:
return # Don't do anything for invisible menu items
if isinstance(node.parent.item, kconfiglib.Choice):
return # Skip choice nodes, they are handled as part of the parent (see below)
try:
name = node.item.name
except AttributeError:
name = None
is_menu = node_is_menu(node)
## Heading
if name:
f.write('.. envvar:: CONFIG_%s\n\n' % name)
# menus get a proper heading
if is_menu:
title = node.prompt[0]
f.write('%s\n' % title)
f.write(HEADING_SYMBOLS[get_heading_level(node)] * len(title))
f.write('\n\n')
if should_print_preview_links(node):
# print preview links to all items in this menu
# for the first menu which contains at least one non-menu item
# (ie per component, or per top-level KConfig.projbuild menu)
def print_previews(parent):
child = parent.list
while child:
if not node_is_menu(child):
f.write('- :envvar:`CONFIG_%s`\n' % child.item.name)
if child.list and not isinstance(child.item, kconfiglib.Choice):
print_previews(child)
child = child.next
print_previews(node)
f.write('\n\n')
if name:
f.write('%s%s\n\n' % (INDENT, node.prompt[0]))
try:
if node.help:
# Help text normally contains newlines, but spaces at the beginning of
# each line are stripped by kconfiglib. We need to re-indent the text
# to produce valid ReST.
f.write(format_rest_text(node.help, INDENT))
except AttributeError:
pass # No help
if node.parent is not None and not is_menu:
f.write('%sFound in\n%s%s\n\n' % (INDENT, INDENT * 2,
get_breadcrumbs(node)))
if isinstance(node.item, kconfiglib.Choice):
f.write('%sAvailable options:\n' % INDENT)
choice_node = node.list
while choice_node:
# Format available options as a list
f.write('%s- %-20s (`CONFIG_%s`)\n' % (INDENT * 2, choice_node.prompt[0], choice_node.item.name))
if choice_node.help:
HELP_INDENT = INDENT * 2
fmt_help = format_rest_text(choice_node.help, ' ' + HELP_INDENT)
f.write('%s \n%s\n' % (HELP_INDENT, fmt_help))
choice_node = choice_node.next
f.write('\n\n')
if __name__ == '__main__':
print("Run this via 'confgen.py --output doc FILENAME'")