mirror of
https://github.com/facebook/sapling.git
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4c76d686a8
Summary: Automatic upgrade to remove `version` override and silence errors. Reviewed By: grievejia Differential Revision: D17956249 fbshipit-source-id: d5c8b5aa73151b3fea67aec35d70f332030da2c9
179 lines
6.3 KiB
Python
179 lines
6.3 KiB
Python
#!/usr/bin/env python3
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# Copyright (c) Facebook, Inc. and its affiliates.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2.
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import argparse
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import binascii
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import os
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import shutil
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import stat
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import sys
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from pathlib import Path
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from typing import BinaryIO, Optional
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from facebook.eden.overlay.ttypes import OverlayDir
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from . import cmd_util, debug as debug_mod, overlay as overlay_mod, subcmd as subcmd_mod
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cmd = debug_mod.debug_cmd
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@cmd("overlay", "Show data about the overlay")
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# pyre-fixme[13]: Attribute `args` is never initialized.
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# pyre-fixme[13]: Attribute `overlay` is never initialized.
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class OverlayCmd(subcmd_mod.Subcmd):
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args: argparse.Namespace
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overlay: overlay_mod.Overlay
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def setup_parser(self, parser: argparse.ArgumentParser) -> None:
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parser.add_argument(
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"-n",
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"--number",
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type=int,
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help="Display information for the specified inode number.",
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)
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parser.add_argument(
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"-d", "--depth", type=int, default=0, help="Recurse to the specified depth."
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)
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parser.add_argument(
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"-r",
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"--recurse",
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action="store_const",
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const=-1,
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dest="depth",
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default=0,
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help="Recursively print child entries.",
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)
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parser.add_argument(
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"-O",
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"--overlay",
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help="Explicitly specify the path to the overlay directory.",
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)
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parser.add_argument(
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"-x",
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"--extract-to",
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dest="output_path",
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help="Copy the specified inode data to the destination path.",
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)
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parser.add_argument("path", nargs="?", help="The path to the eden mount point.")
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def run(self, args: argparse.Namespace) -> int:
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self.args = args
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if args.overlay is not None:
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if args.path:
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rel_path = Path(args.path)
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else:
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rel_path = Path()
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overlay_dir = Path(args.overlay)
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else:
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path = args.path or os.getcwd()
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_instance, checkout, rel_path = cmd_util.require_checkout(args, path)
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overlay_dir = checkout.state_dir.joinpath("local")
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self.overlay = overlay_mod.Overlay(str(overlay_dir))
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if args.number is not None:
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self._process_root(args.number, Path())
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elif rel_path != Path():
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inode_number = self.overlay.lookup_path(rel_path)
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if inode_number is None:
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print(f"{rel_path} is not materialized", file=sys.stderr)
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return 1
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self._process_root(inode_number, rel_path)
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else:
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self._process_root(1, Path())
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return 0
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def _process_root(self, inode_number: int, initial_path: Path):
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output_path: Optional[Path] = None
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if self.args.output_path is not None:
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output_path = Path(self.args.output_path)
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with self.overlay.open_overlay_file(inode_number) as f:
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header = self.overlay.read_header(f)
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if header.type == overlay_mod.OverlayHeader.TYPE_DIR:
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if output_path:
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self.overlay.extract_dir(inode_number, output_path)
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print(f"Extracted materialized directory contents to {output_path}")
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else:
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self._process_overlay(inode_number, initial_path)
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elif header.type == overlay_mod.OverlayHeader.TYPE_FILE:
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if output_path:
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self.overlay.extract_file(
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inode_number, output_path, stat.S_IFREG | 0o644
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)
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print(f"Extracted inode {inode_number} to {output_path}")
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else:
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self._print_file(f)
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else:
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raise Exception(
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f"found invalid file type information in overlay "
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f"file header: {type!r}"
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)
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def _print_file(self, f: BinaryIO) -> None:
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shutil.copyfileobj(f, sys.stdout.buffer) # type: ignore
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def _process_overlay(self, inode_number: int, path: Path, level: int = 0) -> None:
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data = self.overlay.read_dir_inode(inode_number)
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self._print_overlay_tree(inode_number, path, data)
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# If self.args.depth is negative, recurse forever.
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# Stop if self.args.depth is non-negative, and level reaches the maximum
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# requested recursion depth.
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if self.args.depth >= 0 and level >= self.args.depth:
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return
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entries = {} if data.entries is None else data.entries
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for name, entry in entries.items():
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if entry.hash or entry.inodeNumber is None or entry.inodeNumber == 0:
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# This entry is not materialized
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continue
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if entry.mode is None or stat.S_IFMT(entry.mode) != stat.S_IFDIR:
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# Only display data for directories
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continue
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print()
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entry_path = path.joinpath(name)
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self._process_overlay(entry.inodeNumber, entry_path, level + 1)
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def _print_overlay_tree(
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self, inode_number: int, path: Path, tree_data: OverlayDir
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) -> None:
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def hex(binhash: Optional[bytes]) -> str:
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if binhash is None:
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return "None"
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else:
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return binascii.hexlify(binhash).decode("utf-8")
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print("Inode {}: {}".format(inode_number, path))
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if not tree_data.entries:
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return
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name_width = max(len(name) for name in tree_data.entries)
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for name, entry in tree_data.entries.items():
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assert entry.mode is not None
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perms = entry.mode & 0o7777
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file_type = stat.S_IFMT(entry.mode)
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if file_type == stat.S_IFREG:
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file_type_flag = "f"
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elif file_type == stat.S_IFDIR:
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file_type_flag = "d"
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elif file_type == stat.S_IFLNK:
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file_type_flag = "l"
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else:
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file_type_flag = "?"
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print(
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" {:{name_width}s} : {:12d} {} {:04o} {}".format(
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name,
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entry.inodeNumber,
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file_type_flag,
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perms,
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hex(entry.hash),
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name_width=name_width,
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)
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)
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