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3247ae81e4
#no_merge_commit
186 lines
6.3 KiB
Python
186 lines
6.3 KiB
Python
#!/usr/bin/env python3
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import bisect
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from dataclasses import asdict
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from hashlib import md5
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from logging import getLogger
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from pathlib import Path
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from typing import TYPE_CHECKING, Dict, Iterable, List, Optional, Union
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from sys import modules
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from docker_images_helper import get_images_info
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from ci_config import DigestConfig
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from git_helper import Runner
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from env_helper import ROOT_DIR
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from ci_utils import cd
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DOCKER_DIGEST_LEN = 12
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JOB_DIGEST_LEN = 10
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if TYPE_CHECKING:
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from hashlib import ( # pylint:disable=no-name-in-module,ungrouped-imports
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_Hash as HASH,
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)
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else:
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HASH = "_Hash"
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logger = getLogger(__name__)
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def _digest_file(file: Path, hash_object: HASH) -> None:
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assert file.is_file()
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with open(file, "rb") as fd:
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for chunk in iter(lambda: fd.read(4096), b""):
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hash_object.update(chunk)
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def digest_path(
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path: Union[Path, str],
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hash_object: Optional[HASH] = None,
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exclude_files: Optional[Iterable[str]] = None,
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exclude_dirs: Optional[Iterable[Union[Path, str]]] = None,
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) -> HASH:
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"""Calculates md5 (or updates existing hash_object) hash of the path, either it's
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directory or file
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@exclude_files - file extension(s) or any filename suffix(es) that you want to exclude from digest
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@exclude_dirs - dir names that you want to exclude from digest
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"""
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path = Path(path)
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hash_object = hash_object or md5()
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if path.is_file():
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if not exclude_files or not any(path.name.endswith(x) for x in exclude_files):
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_digest_file(path, hash_object)
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elif path.is_dir():
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if not exclude_dirs or not any(path.name == x for x in exclude_dirs):
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for p in sorted(path.iterdir()):
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digest_path(p, hash_object, exclude_files, exclude_dirs)
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else:
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pass # broken symlink
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return hash_object
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def digest_paths(
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paths: Iterable[Union[Path, str]],
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hash_object: Optional[HASH] = None,
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exclude_files: Optional[Iterable[str]] = None,
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exclude_dirs: Optional[Iterable[Union[Path, str]]] = None,
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) -> HASH:
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"""Calculates aggregated md5 (or updates existing hash_object) hash of passed paths.
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The order is processed as given"""
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hash_object = hash_object or md5()
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paths_all: List[Path] = []
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with cd(ROOT_DIR):
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for p in paths:
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if isinstance(p, str) and "*" in p:
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for path in Path(".").glob(p):
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bisect.insort(paths_all, path.absolute()) # type: ignore[misc]
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else:
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bisect.insort(paths_all, Path(p).absolute()) # type: ignore[misc]
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for path in paths_all: # type: ignore
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if path.exists():
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digest_path(path, hash_object, exclude_files, exclude_dirs)
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else:
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raise AssertionError(f"Invalid path: {path}")
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return hash_object
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def digest_script(path_str: str) -> HASH:
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"""Accepts value of the __file__ executed script and calculates the md5 hash for it"""
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path = Path(path_str)
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parent = path.parent
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md5_hash = md5()
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with cd(ROOT_DIR):
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try:
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for script in modules.values():
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script_path = getattr(script, "__file__", "")
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if parent.absolute().as_posix() in script_path:
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logger.debug("Updating the hash with %s", script_path)
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_digest_file(Path(script_path), md5_hash)
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except RuntimeError:
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logger.warning("The modules size has changed, retry calculating digest")
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return digest_script(path_str)
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return md5_hash
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def digest_string(string: str) -> str:
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hash_object = md5()
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hash_object.update(string.encode("utf-8"))
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return hash_object.hexdigest()
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class DockerDigester:
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EXCLUDE_FILES = [".md"]
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def __init__(self):
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self.images_info = get_images_info()
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assert self.images_info, "Fetch image info error"
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def get_image_digest(self, name: str) -> str:
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assert isinstance(name, str)
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with cd(ROOT_DIR):
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deps = [name]
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digest = None
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while deps:
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dep_name = deps.pop(0)
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digest = digest_path(
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self.images_info[dep_name]["path"],
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digest,
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exclude_files=self.EXCLUDE_FILES,
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)
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deps += self.images_info[dep_name]["deps"]
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assert digest
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return digest.hexdigest()[0:DOCKER_DIGEST_LEN]
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def get_all_digests(self) -> Dict:
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res = {}
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for image_name in self.images_info:
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res[image_name] = self.get_image_digest(image_name)
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return res
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class JobDigester:
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def __init__(self):
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self.dd = DockerDigester()
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self.cache: Dict[str, str] = {}
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@staticmethod
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def _get_config_hash(digest_config: DigestConfig) -> str:
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data_dict = asdict(digest_config)
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hash_obj = md5()
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hash_obj.update(str(data_dict).encode())
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hash_string = hash_obj.hexdigest()
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return hash_string
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def get_job_digest(self, digest_config: DigestConfig) -> str:
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if not digest_config.include_paths:
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# job is not for digest
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return "f" * JOB_DIGEST_LEN
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cache_key = self._get_config_hash(digest_config)
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if cache_key in self.cache:
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return self.cache[cache_key]
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digest_str: List[str] = []
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if digest_config.include_paths:
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digest = digest_paths(
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digest_config.include_paths,
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hash_object=None,
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exclude_files=digest_config.exclude_files,
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exclude_dirs=digest_config.exclude_dirs,
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)
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digest_str += (digest.hexdigest(),)
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if digest_config.docker:
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for image_name in digest_config.docker:
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image_digest = self.dd.get_image_digest(image_name)
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digest_str += (image_digest,)
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if digest_config.git_submodules:
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submodules_sha = Runner().run(
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"git submodule | awk '{print $1}' | sed 's/^[+-]//'"
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)
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assert submodules_sha and len(submodules_sha) > 10
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submodules_digest = digest_string("-".join(submodules_sha))
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digest_str += (submodules_digest,)
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res = digest_string("-".join(digest_str))[0:JOB_DIGEST_LEN]
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self.cache[cache_key] = res
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return res
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