2 # -*- coding: utf-8 -*-
4 # gen-kconfig-doc.py — generate Sphinx .rst file from Kconfig files
6 # This script iterates over Kconfig and Kconfig.projbuild files in
7 # ESP-IDF component directories, and outputs documentation for these options
9 # For each option in Kconfig file (e.g. 'FOO'), CONFIG_FOO link target is
10 # generated, allowing options to be referenced in other documents
11 # (using :envvar:`CONFIG_FOO`)
13 # This script uses kconfiglib library to do all the work of parsing Kconfig
14 # files: https://github.com/ulfalizer/Kconfiglib
16 # Copyright 2017 Espressif Systems (Shanghai) PTE LTD
18 # Licensed under the Apache License, Version 2.0 (the "License");
19 # you may not use this file except in compliance with the License.
20 # You may obtain a copy of the License at
22 # http:#www.apache.org/licenses/LICENSE-2.0
24 # Unless required by applicable law or agreed to in writing, software
25 # distributed under the License is distributed on an "AS IS" BASIS,
26 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
27 # See the License for the specific language governing permissions and
28 # limitations under the License.
34 # Indentation to be used in the generated file
37 # Characters used when underlining section heading
38 HEADING_SYMBOLS = '#*=-^"+'
40 # Keep the heading level in sync with api-reference/kconfig.rst
41 INITIAL_HEADING_LEVEL = 2
43 OPTION_HEADING_LEVEL = 6
45 def print_menu_contents(title, items, heading_level, breadcrumbs, genindex):
48 print_section_heading(title, heading_level)
49 if heading_level == INITIAL_HEADING_LEVEL+1:
50 print_menu_contents(title, items, heading_level, breadcrumbs, True)
53 if len(breadcrumbs) > 0:
54 new_breadcrumbs = breadcrumbs + ' > ' + entry.get_title()
56 new_breadcrumbs = entry.get_title()
58 print_menu_contents(entry.get_title(), entry.get_items(),
59 min(heading_level + 1, MAX_HEADING_LEVEL),
60 new_breadcrumbs, genindex)
62 print_item(entry, breadcrumbs)
63 elif entry.is_choice():
64 print_choice(entry, breadcrumbs)
66 if len(entry.get_prompts()) == 0:
67 # Skip entries which can never be visible
69 # Currently this does not handle 'menuconfig' entires in any special way,
70 # as Kconfglib offers no way of recognizing them automatically.
71 print_option(entry, breadcrumbs)
72 # Trailing newline after every option
75 def print_choice(choice, breadcrumbs):
76 print_option(choice, breadcrumbs)
78 print '%sAvailable options' % INDENT
79 for opt in choice.get_symbols():
80 # Format available options as a list
81 print '%s- %s' % (INDENT * 2, opt.name)
83 def print_section_heading(title, heading_level):
85 print HEADING_SYMBOLS[heading_level] * len(title)
88 def print_option(opt, breadcrumbs):
89 # add link target so we can use :envvar:`CONFIG_FOO`
90 print '.. envvar:: CONFIG_%s' % opt.name
92 if len(opt.prompts) > 0:
93 print '%s%s' % (INDENT, opt.prompts[0][0])
95 if opt.get_help() is not None:
96 # Help text normally contains newlines, but spaces at the beginning of
97 # each line are stripped by kconfiglib. We need to re-indent the text
98 # to produce valid ReST.
99 print '%s%s' % (INDENT, opt.get_help().replace('\n', '\n%s' % INDENT))
100 print '%sFound in\n%s' % (INDENT, INDENT * 2 + breadcrumbs)
103 def print_item(opt, breadcrumbs):
104 print '- :envvar:`CONFIG_%s`' % opt.name
107 def process_kconfig_file(kconfig_file, heading_level, breadcrumbs):
108 if os.path.exists(kconfig_file):
109 cfg = kconfiglib.Config(kconfig_file, print_warnings=True)
110 print_menu_contents(None, cfg.get_top_level_items(), heading_level, breadcrumbs, False)
112 def print_all_components():
113 heading_level = INITIAL_HEADING_LEVEL
114 # Currently this works only for IDF components.
115 # TODO: figure out if this can be re-used for documenting applications?
116 components_path = os.path.join(os.path.curdir, '../..', 'components')
117 for component_name in os.listdir(components_path):
118 if component_name.startswith('.'):
119 continue # skip system thumbnail folders
121 kconfig_file_path = os.path.join(components_path, component_name, 'Kconfig')
123 process_kconfig_file(kconfig_file_path, heading_level, 'Component config')
124 process_kconfig_file(kconfig_file_path + '.projbuild', heading_level, '')
126 kconfig_file_path = os.path.join(os.path.curdir, '../..', 'Kconfig.compiler')
127 process_kconfig_file(kconfig_file_path, heading_level, '')
129 if __name__ == '__main__':
130 print_all_components()