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https://github.com/ClickHouse/ClickHouse.git
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81 lines
2.7 KiB
Python
81 lines
2.7 KiB
Python
#!/usr/bin/env python3
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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, Iterable, Optional
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from sys import modules
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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_directory(directory: Path, hash_object: HASH) -> None:
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assert directory.is_dir()
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for p in sorted(directory.rglob("*")):
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if p.is_symlink() and p.is_dir():
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# The symlink directory is not listed recursively, so we process it manually
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(_digest_directory(p, hash_object))
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if p.is_file():
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(_digest_file(p, hash_object))
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def digest_path(path: Path, hash_object: Optional[HASH] = None) -> 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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hash_object = hash_object or md5()
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if path.is_dir():
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_digest_directory(path, hash_object)
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elif path.is_file():
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_digest_file(path, hash_object)
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return hash_object
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def digest_paths(paths: Iterable[Path], hash_object: Optional[HASH] = None) -> 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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for path in paths:
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if path.exists():
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digest_path(path, hash_object)
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return hash_object
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def digest_consistent_paths(
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paths: Iterable[Path], hash_object: Optional[HASH] = 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 doesn't matter, paths are converted to `absolute` and ordered before
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calculation"""
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return digest_paths(sorted(p.absolute() for p in paths), 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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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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