esp-idf/tools/kconfig_new/gen_kconfig_doc.py

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#!/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 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 = 3
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.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:
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 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
try:
is_menu = node.item == kconfiglib.MENU or node.is_menuconfig
except AttributeError:
is_menu = False # not all MenuNodes have is_menuconfig for some reason
## Heading
if name:
title = name
# add link target so we can use :ref:`CONFIG_FOO`
f.write('.. _CONFIG_%s:\n\n' % name)
else:
title = node.prompt[0]
# if no symbol name, use the prompt as the heading
if True or is_menu:
f.write('%s\n' % title)
f.write(HEADING_SYMBOLS[get_heading_level(node)] * len(title))
f.write('\n\n')
else:
f.write('**%s**\n\n\n' % title)
if name:
f.write('%s%s\n\n' % (INDENT, node.prompt[0]))
f.write('%s:emphasis:`Found in: %s`\n\n' % (INDENT, get_breadcrumbs(node)))
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 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 (%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'")