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# Copyright 2020 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Module for project config wrapper object."""
import warnings
import yaml
# The version of jsonschema in the chroot has a bunch of
# DeprecationWarnings that fire when we import it. Suppress these
# during the import to keep the noise down.
with warnings.catch_warnings():
warnings.simplefilter('ignore')
import jsonschema
import zmake.build_config as build_config
import zmake.modules as modules
import zmake.output_packers as packers
import zmake.util as util
def module_dts_overlay_name(modpath, board_name):
"""Given a board name, return the expected DTS overlay path.
Args:
modpath: the module path as a pathlib.Path object
board_name: the name of the board
Returns:
A pathlib.Path object to the expected overlay path.
"""
return modpath / 'zephyr' / 'dts' / 'board-overlays' / '{}.dts'.format(
board_name)
class ProjectConfig:
"""An object wrapping zmake.yaml."""
validator = jsonschema.Draft7Validator
schema = {
'type': 'object',
'required': ['supported-zephyr-versions', 'board', 'output-type',
'toolchain'],
'properties': {
'supported-zephyr-versions': {
'type': 'array',
'items': {
'type': 'string',
'enum': ['v2.4', 'v2.5'],
},
'minItems': 1,
'uniqueItems': True,
},
'board': {
'type': 'string',
},
'modules': {
'type': 'array',
'items': {
'type': 'string',
'enum': list(modules.known_modules),
},
},
'output-type': {
'type': 'string',
'enum': list(packers.packer_registry),
},
'toolchain': {
'type': 'string',
},
'is-test': {
'type': 'boolean',
},
'dts-overlays': {
'type': 'array',
'items': {
'type': 'string',
},
},
},
}
def __init__(self, config_dict):
self.validator.check_schema(self.schema)
jsonschema.validate(config_dict, self.schema, cls=self.validator)
self.config_dict = config_dict
@property
def supported_zephyr_versions(self):
return [util.parse_zephyr_version(x)
for x in self.config_dict['supported-zephyr-versions']]
@property
def board(self):
return self.config_dict['board']
@property
def modules(self):
return self.config_dict.get('modules', list(modules.known_modules))
@property
def output_packer(self):
return packers.packer_registry[self.config_dict['output-type']]
@property
def toolchain(self):
return self.config_dict['toolchain']
@property
def is_test(self):
return self.config_dict.get('is-test', False)
@property
def dts_overlays(self):
return self.config_dict.get('dts-overlays', [])
class Project:
"""An object encapsulating a project directory."""
def __init__(self, project_dir, config_dict=None):
self.project_dir = project_dir.resolve()
if not config_dict:
with open(self.project_dir / 'zmake.yaml') as f:
config_dict = yaml.safe_load(f)
self.config = ProjectConfig(config_dict)
self.packer = self.config.output_packer(self)
def iter_builds(self):
"""Iterate thru the build combinations provided by the project's packer.
Yields:
2-tuples of a build configuration name and a BuildConfig.
"""
conf = build_config.BuildConfig(cmake_defs={'BOARD': self.config.board})
if (self.project_dir / 'boards').is_dir():
conf |= build_config.BuildConfig(
cmake_defs={'BOARD_ROOT': str(self.project_dir)})
prj_conf = self.project_dir / 'prj.conf'
if prj_conf.is_file():
conf |= build_config.BuildConfig(kconfig_files=[prj_conf])
for build_name, packer_config in self.packer.configs():
yield build_name, conf | packer_config
def find_dts_overlays(self, modules):
"""Find appropriate dts overlays from registered modules.
Args:
modules: A dictionary of module names mapping to paths.
Returns:
A BuildConfig with relevant configurations to enable the
found DTS overlay files.
"""
overlays = []
for module_path in modules.values():
dts_path = module_dts_overlay_name(module_path, self.config.board)
if dts_path.is_file():
overlays.append(dts_path.resolve())
overlays.extend(self.project_dir / f for f in self.config.dts_overlays)
if overlays:
return build_config.BuildConfig(
cmake_defs={'DTC_OVERLAY_FILE': ';'.join(map(str, overlays))})
else:
return build_config.BuildConfig()
def prune_modules(self, module_paths):
"""Reduce a modules dict to the ones required by this project.
If this project does not define a modules list in the
configuration, it is assumed that all known modules to Zmake
are required. This is typically inconsequential as Zephyr
module design conventions require a Kconfig option to actually
enable most modules.
Args:
module_paths: A dictionary mapping module names to their
paths. This dictionary is not modified.
Returns:
A new module_paths dictionary with only the modules
required by this project.
Raises:
A KeyError, if a required module is unavailable.
"""
result = {}
for module in self.config.modules:
try:
result[module] = module_paths[module]
except KeyError as e:
raise KeyError(
'The {!r} module is required by the {} project, but is not '
'available.'.format(module, self.project_dir)) from e
return result
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