esp-idf/tools/kconfig_new/confgen.py

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#!/usr/bin/env python
#
# Command line tool to take in ESP-IDF sdkconfig files with project
# settings and output data in multiple formats (update config, generate
# header file, generate .cmake include file, documentation, etc).
#
# Used internally by the ESP-IDF build system. But designed to be
# non-IDF-specific.
#
# Copyright 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.
from __future__ import print_function
import argparse
import sys
import os
import os.path
import tempfile
import json
import gen_kconfig_doc
import kconfiglib
import pprint
__version__ = "0.1"
if not "IDF_CMAKE" in os.environ:
os.environ["IDF_CMAKE"] = ""
def main():
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parser = argparse.ArgumentParser(description='confgen.py v%s - Config Generation Tool' % __version__, prog=os.path.basename(sys.argv[0]))
parser.add_argument('--config',
help='Project configuration settings',
nargs='?',
default=None)
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parser.add_argument('--defaults',
help='Optional project defaults file, used if --config file doesn\'t exist',
nargs='?',
default=None)
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parser.add_argument('--create-config-if-missing',
help='If set, a new config file will be saved if the old one is not found',
action='store_true')
parser.add_argument('--kconfig',
help='KConfig file with config item definitions',
required=True)
parser.add_argument('--output', nargs=2, action='append',
help='Write output file (format and output filename)',
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metavar=('FORMAT', 'FILENAME'),
default=[])
parser.add_argument('--env', action='append', default=[],
help='Environment to set when evaluating the config file', metavar='NAME=VAL')
args = parser.parse_args()
for fmt, filename in args.output:
if not fmt in OUTPUT_FORMATS.keys():
print("Format '%s' not recognised. Known formats: %s" % (fmt, OUTPUT_FORMATS.keys()))
sys.exit(1)
try:
args.env = [ (name,value) for (name,value) in ( e.split("=",1) for e in args.env) ]
except ValueError:
print("--env arguments must each contain =. To unset an environment variable, use 'ENV='")
sys.exit(1)
for name, value in args.env:
os.environ[name] = value
config = kconfiglib.Kconfig(args.kconfig)
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if args.defaults is not None:
# always load defaults first, so any items which are not defined in that config
# will have the default defined in the defaults file
if not os.path.exists(args.defaults):
raise RuntimeError("Defaults file not found: %s" % args.defaults)
config.load_config(args.defaults)
if args.config is not None:
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if os.path.exists(args.config):
config.load_config(args.config)
elif args.create_config_if_missing:
print("Creating config file %s..." % args.config)
config.write_config(args.config)
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elif args.default is None:
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raise RuntimeError("Config file not found: %s" % args.config)
for output_type, filename in args.output:
temp_file = tempfile.mktemp(prefix="confgen_tmp")
try:
output_function = OUTPUT_FORMATS[output_type]
output_function(config, temp_file)
update_if_changed(temp_file, filename)
finally:
try:
os.remove(temp_file)
except OSError:
pass
def write_config(config, filename):
CONFIG_HEADING = """#
# Automatically generated file. DO NOT EDIT.
# Espressif IoT Development Framework (ESP-IDF) Project Configuration
#
"""
config.write_config(filename, header=CONFIG_HEADING)
def write_header(config, filename):
CONFIG_HEADING = """/*
* Automatically generated file. DO NOT EDIT.
* Espressif IoT Development Framework (ESP-IDF) Configuration Header
*/
#pragma once
"""
config.write_autoconf(filename, header=CONFIG_HEADING)
def write_cmake(config, filename):
with open(filename, "w") as f:
write = f.write
prefix = config.config_prefix
write("""#
# Automatically generated file. DO NOT EDIT.
# Espressif IoT Development Framework (ESP-IDF) Configuration cmake include file
#
""")
def write_node(node):
sym = node.item
if not isinstance(sym, kconfiglib.Symbol):
return
# Note: str_value calculates _write_to_conf, due to
# internal magic in kconfiglib...
val = sym.str_value
if sym._write_to_conf:
if sym.orig_type in (kconfiglib.BOOL, kconfiglib.TRISTATE) and val == "n":
val = "" # write unset values as empty variables
write("set({}{} \"{}\")\n".format(
prefix, sym.name, val))
config.walk_menu(write_node)
def get_json_values(config):
config_dict = {}
def write_node(node):
sym = node.item
if not isinstance(sym, kconfiglib.Symbol):
return
val = sym.str_value # this calculates _write_to_conf, due to kconfiglib magic
if sym._write_to_conf:
if sym.type in [ kconfiglib.BOOL, kconfiglib.TRISTATE ]:
val = (val != "n")
elif sym.type == kconfiglib.HEX:
val = int(val, 16)
elif sym.type == kconfiglib.INT:
val = int(val)
config_dict[sym.name] = val
config.walk_menu(write_node)
return config_dict
def write_json(config, filename):
config_dict = get_json_values(config)
with open(filename, "w") as f:
json.dump(config_dict, f, indent=4, sort_keys=True)
def write_json_menus(config, filename):
result = [] # root level items
node_lookup = {} # lookup from MenuNode to an item in result
def write_node(node):
try:
json_parent = node_lookup[node.parent]["children"]
except KeyError:
assert not node.parent in node_lookup # if fails, we have a parent node with no "children" entity (ie a bug)
json_parent = result # root level node
# node.kconfig.y means node has no dependency,
if node.dep is node.kconfig.y:
depends = None
else:
depends = kconfiglib.expr_str(node.dep)
try:
is_menuconfig = node.is_menuconfig
except AttributeError:
is_menuconfig = False
new_json = None
if node.item == kconfiglib.MENU or is_menuconfig:
new_json = { "type" : "menu",
"title" : node.prompt[0],
"depends_on": depends,
"children": []
}
if is_menuconfig:
sym = node.item
new_json["name"] = sym.name
new_json["help"] = node.help
new_json["is_menuconfig"] = is_menuconfig
greatest_range = None
if len(sym.ranges) > 0:
# Note: Evaluating the condition using kconfiglib's expr_value
# should have one result different from value 0 ("n").
for min_range, max_range, cond_expr in sym.ranges:
if kconfiglib.expr_value(cond_expr) != "n":
greatest_range = [min_range, max_range]
new_json["range"] = greatest_range
elif isinstance(node.item, kconfiglib.Symbol):
sym = node.item
greatest_range = None
if len(sym.ranges) > 0:
# Note: Evaluating the condition using kconfiglib's expr_value
# should have one result different from value 0 ("n").
for min_range, max_range, cond_expr in sym.ranges:
if kconfiglib.expr_value(cond_expr) != "n":
greatest_range = [int(min_range.str_value), int(max_range.str_value)]
new_json = {
"type" : kconfiglib.TYPE_TO_STR[sym.type],
"name" : sym.name,
"title": node.prompt[0] if node.prompt else None,
"depends_on" : depends,
"help": node.help,
"range" : greatest_range,
"children": [],
}
elif isinstance(node.item, kconfiglib.Choice):
choice = node.item
new_json = {
"type": "choice",
"title": node.prompt[0],
"name": choice.name,
"depends_on" : depends,
"help": node.help,
"children": []
}
if new_json:
json_parent.append(new_json)
node_lookup[node] = new_json
config.walk_menu(write_node)
with open(filename, "w") as f:
f.write(json.dumps(result, sort_keys=True, indent=4))
def update_if_changed(source, destination):
with open(source, "r") as f:
source_contents = f.read()
if os.path.exists(destination):
with open(destination, "r") as f:
dest_contents = f.read()
if source_contents == dest_contents:
return # nothing to update
with open(destination, "w") as f:
f.write(source_contents)
OUTPUT_FORMATS = {
"config" : write_config,
"header" : write_header,
"cmake" : write_cmake,
"docs" : gen_kconfig_doc.write_docs,
"json" : write_json,
"json_menus" : write_json_menus,
}
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class FatalError(RuntimeError):
"""
Class for runtime errors (not caused by bugs but by user input).
"""
pass
if __name__ == '__main__':
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try:
main()
except FatalError as e:
print("A fatal error occurred: %s" % e)
sys.exit(2)