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""" |
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(c) 2006-2013, Armin Rigo, Holger Krekel, Maciej Fijalkowski |
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""" |
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from __future__ import annotations |
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from typing import TYPE_CHECKING |
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from typing import Literal |
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from typing import cast |
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if TYPE_CHECKING: |
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from execnet.gateway_base import Channel |
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def serve_rsync(channel: Channel) -> None: |
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import os |
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import shutil |
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import stat |
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from hashlib import md5 |
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destdir, options = cast("tuple[str, dict[str, object]]", channel.receive()) |
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modifiedfiles = [] |
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def remove(path: str) -> None: |
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assert path.startswith(destdir) |
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try: |
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os.unlink(path) |
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except OSError: |
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shutil.rmtree(path, True) |
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def receive_directory_structure(path: str, relcomponents: list[str]) -> None: |
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try: |
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st = os.lstat(path) |
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except OSError: |
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st = None |
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msg = channel.receive() |
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if isinstance(msg, list): |
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if st and not stat.S_ISDIR(st.st_mode): |
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os.unlink(path) |
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st = None |
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if not st: |
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os.makedirs(path) |
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mode = msg.pop(0) |
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if mode: |
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os.chmod(path, mode | 0o700) |
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entrynames = {} |
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for entryname in msg: |
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destpath = os.path.join(path, entryname) |
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receive_directory_structure(destpath, [*relcomponents, entryname]) |
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entrynames[entryname] = True |
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if options.get("delete"): |
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for othername in os.listdir(path): |
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if othername not in entrynames: |
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otherpath = os.path.join(path, othername) |
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remove(otherpath) |
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elif msg is not None: |
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assert isinstance(msg, tuple) |
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checksum = None |
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if st: |
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if stat.S_ISREG(st.st_mode): |
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msg_mode, msg_mtime, msg_size = msg |
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if msg_size != st.st_size: |
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pass |
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elif msg_mtime != st.st_mtime: |
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f = open(path, "rb") |
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checksum = md5(f.read()).digest() |
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f.close() |
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elif msg_mode and msg_mode != st.st_mode: |
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os.chmod(path, msg_mode | 0o700) |
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return |
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else: |
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return |
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else: |
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remove(path) |
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channel.send(("send", (relcomponents, checksum))) |
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modifiedfiles.append((path, msg)) |
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receive_directory_structure(destdir, []) |
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STRICT_CHECK = False |
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channel.send(("list_done", None)) |
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for path, (mode, time, size) in modifiedfiles: |
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data = cast(bytes, channel.receive()) |
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channel.send(("ack", path[len(destdir) + 1 :])) |
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if data is not None: |
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if STRICT_CHECK and len(data) != size: |
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raise OSError(f"file modified during rsync: {path!r}") |
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f = open(path, "wb") |
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f.write(data) |
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f.close() |
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try: |
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if mode: |
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os.chmod(path, mode) |
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os.utime(path, (time, time)) |
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except OSError: |
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pass |
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del data |
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channel.send(("links", None)) |
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msg = channel.receive() |
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while msg != 42: |
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_type, relpath, linkpoint = cast( |
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"tuple[Literal['linkbase', 'link'], str, str]", msg |
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) |
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path = os.path.join(destdir, relpath) |
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try: |
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remove(path) |
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except OSError: |
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pass |
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if _type == "linkbase": |
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src = os.path.join(destdir, linkpoint) |
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else: |
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assert _type == "link", _type |
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src = linkpoint |
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os.symlink(src, path) |
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msg = channel.receive() |
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channel.send(("done", None)) |
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if __name__ == "__channelexec__": |
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serve_rsync(channel) |
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