forked from Imagelibrary/seL4
c642a398ba
gen_config.json provides a language-independent means of accessing the kernel configuration. Before, gen_config.h was generated directly in CMake. Now, gen_config.yaml is generated directly in CMake, and gen_config.h and gen_config.json are derived from gen_config.yaml. Signed-off-by: Nick Spinale <nick@nickspinale.com>
84 lines
2.1 KiB
Python
84 lines
2.1 KiB
Python
# Copyright 2022, seL4 Project a Series of LF Projects, LLC
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#
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# SPDX-License-Identifier: BSD-2-Clause
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#
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import argparse
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import json
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import sys
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import yaml
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def main():
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parser = argparse.ArgumentParser(
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description="Translate a YAML configuration file (e.g. gen_config.yaml) into other formats.",
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)
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parser.add_argument(
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"in_file_yaml",
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metavar="IN_FILE",
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nargs="?",
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type=argparse.FileType("r"),
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default=sys.stdin,
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help="Input YAML file.",
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)
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parser.add_argument(
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"--write-c",
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metavar="OUT_FILE",
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dest="out_file_c",
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type=argparse.FileType("w"),
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default=sys.stdout,
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help="Output C header file.",
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)
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parser.add_argument(
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"--write-json",
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metavar="OUT_FILE",
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dest="out_file_json",
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type=argparse.FileType("w"),
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default=sys.stdout,
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help="Output JSON file.",
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)
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args = parser.parse_args()
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generate(args.in_file_yaml, out_file_c=args.out_file_c,
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out_file_json=args.out_file_json)
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def generate(in_file_yaml, out_file_c=None, out_file_json=None):
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config = yaml.safe_load(in_file_yaml)
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if out_file_c is not None:
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generate_c(config, out_file_c)
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if out_file_json is not None:
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generate_json(config, out_file_json)
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def generate_c(config, out_file):
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header_contents = "#pragma once\n\n"
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for key, value in config.items():
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macro = f"CONFIG_{key}"
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if isinstance(value, bool):
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if value:
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entry = f"#define {macro} 1"
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else:
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entry = f"/* disabled: {macro} */"
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elif isinstance(value, str):
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if value:
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entry = f"#define {macro} {value}"
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else:
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entry = f"#define {macro} /* empty */"
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else:
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raise Exception(
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f"Unexpected type for configuration key {key}:", type(value))
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header_contents += f"{entry}\n"
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out_file.write(header_contents)
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def generate_json(config, out_file):
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json.dump(config, out_file, indent=4)
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if __name__ == "__main__":
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main()
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