mirror of
https://github.com/imayushsaini/Bombsquad-Ballistica-Modded-Server.git
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103 lines
3.4 KiB
Python
103 lines
3.4 KiB
Python
# Released under the MIT License. See LICENSE for details.
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#
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"""Functionality related to transferring files/data."""
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from __future__ import annotations
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import os
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from pathlib import Path
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from dataclasses import dataclass
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from typing import TYPE_CHECKING, Annotated
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from efro.dataclassio import ioprepped, IOAttrs
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if TYPE_CHECKING:
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pass
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@ioprepped
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@dataclass
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class DirectoryManifestFile:
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"""Describes a file in a manifest."""
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hash_sha256: Annotated[str, IOAttrs('h')]
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size: Annotated[int, IOAttrs('s')]
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@ioprepped
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@dataclass
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class DirectoryManifest:
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"""Contains a summary of files in a directory."""
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files: Annotated[dict[str, DirectoryManifestFile], IOAttrs('f')]
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# _empty_hash: str | None = None
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@classmethod
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def create_from_disk(cls, path: Path) -> DirectoryManifest:
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"""Create a manifest from a directory on disk."""
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import hashlib
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from concurrent.futures import ThreadPoolExecutor
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pathstr = str(path)
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paths: list[str] = []
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if path.is_dir():
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# Build the full list of relative paths.
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for basename, _dirnames, filenames in os.walk(path):
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for filename in filenames:
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fullname = os.path.join(basename, filename)
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assert fullname.startswith(pathstr)
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# Make sure we end up with forward slashes no matter
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# what the os.* stuff above here was using.
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paths.append(Path(fullname[len(pathstr) + 1 :]).as_posix())
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elif path.exists():
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# Just return a single file entry if path is not a dir.
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paths.append(path.as_posix())
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def _get_file_info(filepath: str) -> tuple[str, DirectoryManifestFile]:
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sha = hashlib.sha256()
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fullfilepath = os.path.join(pathstr, filepath)
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if not os.path.isfile(fullfilepath):
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raise RuntimeError(f'File not found: "{fullfilepath}".')
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with open(fullfilepath, 'rb') as infile:
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filebytes = infile.read()
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filesize = len(filebytes)
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sha.update(filebytes)
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return (
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filepath,
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DirectoryManifestFile(
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hash_sha256=sha.hexdigest(), size=filesize
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),
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)
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# Now use all procs to hash the files efficiently.
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cpus = os.cpu_count()
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if cpus is None:
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cpus = 4
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with ThreadPoolExecutor(max_workers=cpus) as executor:
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return cls(files=dict(executor.map(_get_file_info, paths)))
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def validate(self) -> None:
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"""Log any odd data in the manifest; for debugging."""
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import logging
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for fpath, _fentry in self.files.items():
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# We want to be dealing in only forward slashes; make sure
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# that's the case (wondering if we'll ever see backslashes
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# for escape purposes).
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if '\\' in fpath:
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logging.exception(
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"Found unusual path in manifest: '%s'.", fpath
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)
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break # 1 error is enough for now.
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# @classmethod
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# def get_empty_hash(cls) -> str:
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# """Return the hash for an empty file."""
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# if cls._empty_hash is None:
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# import hashlib
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# sha = hashlib.sha256()
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# cls._empty_hash = sha.hexdigest()
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# return cls._empty_hash
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