esp-idf/docs/gen-kconfig-doc.py

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# gen-kconfig-doc.py — generate Sphinx .rst file from Kconfig files
#
# This script iterates over Kconfig and Kconfig.projbuild files in
# ESP-IDF component directories, and outputs documentation for these options
# as ReST markup.
# For each option in Kconfig file (e.g. 'FOO'), CONFIG_FOO link target is
# generated, allowing options to be referenced in other documents
# (using :ref:`CONFIG_FOO`)
#
# This script uses kconfiglib library to do all the work of parsing Kconfig
# files: https://github.com/ulfalizer/Kconfiglib
#
# Copyright 2017 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 = 2
MAX_HEADING_LEVEL = 5
OPTION_HEADING_LEVEL = 6
def print_menu_contents(title, items, heading_level, breadcrumbs):
if title:
print_section_heading(title, heading_level)
for entry in items:
if entry.is_menu():
if len(breadcrumbs) > 0:
new_breadcrumbs = breadcrumbs + ' > ' + entry.get_title()
else:
new_breadcrumbs = entry.get_title()
print_menu_contents(entry.get_title(), entry.get_items(),
min(heading_level + 1, MAX_HEADING_LEVEL),
new_breadcrumbs)
elif entry.is_choice():
print_choice(entry, breadcrumbs)
else:
if len(entry.get_prompts()) == 0:
# Skip entries which can never be visible
continue
# Currently this does not handle 'menuconfig' entires in any special way,
# as Kconfglib offers no way of recognizing them automatically.
print_option(entry, breadcrumbs)
# Trailing newline after every option
print
def print_choice(choice, breadcrumbs):
print_option(choice, breadcrumbs)
print
print '%sAvailable options:' % INDENT
for opt in choice.get_symbols():
# Format available options as a list
print '%s- %s' % (INDENT * 2, opt.name)
def print_section_heading(title, heading_level):
print title
print HEADING_SYMBOLS[heading_level] * len(title)
print
def print_option(opt, breadcrumbs):
# add link target so we can use :ref:`CONFIG_FOO`
print '.. _CONFIG_%s:' % opt.name
print
print_section_heading(opt.name, OPTION_HEADING_LEVEL)
if len(opt.prompts) > 0:
print '%s%s' % (INDENT, opt.prompts[0][0])
print
print '%s:emphasis:`Found in: %s`' % (INDENT, breadcrumbs)
print
if opt.get_help() is not None:
# 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.
print '%s%s' % (INDENT, opt.get_help().replace('\n', '\n%s' % INDENT))
def process_kconfig_file(kconfig_file, heading_level, breadcrumbs):
if os.path.exists(kconfig_file):
cfg = kconfiglib.Config(kconfig_file, print_warnings=True)
print_menu_contents(None, cfg.get_top_level_items(), heading_level, breadcrumbs)
def print_all_components():
heading_level = INITIAL_HEADING_LEVEL
# Currently this works only for IDF components.
# TODO: figure out if this can be re-used for documenting applications?
components_path = os.path.join(os.path.curdir, '..', 'components')
for component_name in os.listdir(components_path):
if component_name.startswith('.'):
continue # skip system thumbnail folders
kconfig_file_path = os.path.join(components_path, component_name, 'Kconfig')
process_kconfig_file(kconfig_file_path, heading_level, 'Component config')
process_kconfig_file(kconfig_file_path + '.projbuild', heading_level, '')
if __name__ == '__main__':
print_all_components()