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cache-ruleset.py
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78 lines (62 loc) · 2.43 KB
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# Copyright 2023 Google LLC
#
# 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.
"""
Create a cache of the given rules.
This is only really intended to be used by CI to pre-cache rulesets
that will be distributed within PyInstaller binaries.
Usage:
$ python scripts/cache-ruleset.py rules/ /path/to/cache/directory
"""
import sys
import logging
import argparse
from pathlib import Path
import capa.main
import capa.rules
import capa.rules.cache
logger = logging.getLogger("cache-ruleset")
def main(argv=None):
if argv is None:
argv = sys.argv[1:]
parser = argparse.ArgumentParser(description="Cache ruleset.")
capa.main.install_common_args(parser)
parser.add_argument("rules", type=str, help="Path to rules directory")
parser.add_argument("cache", type=str, help="Path to cache directory")
args = parser.parse_args(args=argv)
# don't use capa.main.handle_common_args
# because it expects a different format for the --rules argument
if args.quiet:
logging.basicConfig(level=logging.WARNING)
logging.getLogger().setLevel(logging.WARNING)
elif args.debug:
logging.basicConfig(level=logging.DEBUG)
logging.getLogger().setLevel(logging.DEBUG)
else:
logging.basicConfig(level=logging.INFO)
logging.getLogger().setLevel(logging.INFO)
try:
cache_dir = Path(args.cache)
cache_dir.mkdir(parents=True, exist_ok=True)
rules = capa.rules.get_rules([Path(args.rules)], cache_dir)
logger.info("successfully loaded %s rules", len(rules))
except (IOError, capa.rules.InvalidRule, capa.rules.InvalidRuleSet) as e:
logger.error("%s", str(e))
return -1
content = capa.rules.cache.get_ruleset_content(rules)
id = capa.rules.cache.compute_cache_identifier(content)
path = capa.rules.cache.get_cache_path(cache_dir, id)
assert path.exists()
logger.info("cached to: %s", path)
if __name__ == "__main__":
sys.exit(main())