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cloud-sync/cloud_sync/state.py
T
claude-timemachine b31fdd023a
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rename: cloud sync -> instance sync; cloud -> Timemachine Network; drop Tk
Product / UI / CLI / docs rebrand. Internal package, repo, and
on-disk dir names stay 'cloud_sync' / 'cloud-sync' / '.cloud-sync/'
to avoid breaking existing installs; a future commit can do the
file-system rename when the cost is worth paying.

User-facing changes:
  CLI prog name:        cloud-sync     -> instance-sync
  CLI description:      cloud-svc URL  -> Timemachine Network endpoint
  Dialog title:         CLOUD SYNC     -> INSTANCE SYNC
  Dialog title:         CLOUD CONFLICT -> INSTANCE CONFLICT
  Dialog title:         CONNECT CLOUD SAVE -> CONNECT TO THE NETWORK
  Card label:           Cloud Save     -> Remote Save
  Skip button:          Skip cloud sync -> Skip instance sync
  Body copy:            'the cloud'    -> 'the Timemachine Network'
  Window titles:        Cloud sync — ... -> Instance sync — ...
  Log prefix:           cloud-sync:    -> instance-sync:
  Error prose:          'cloud-sync token' -> 'instance-sync token'

Backend changes:
  restic --host tag:    cloud-sync     -> instance-sync
  State.host_tag dflt:  cloud-sync     -> instance-sync
  (Existing snapshots with the old tag still pull fine; we use 'latest'.)

Drop tkinter fallback: ui.py now offers Qt OR Headless. tkinter is
unnecessary given we already maintain Qt + headless; one less code
path to keep styled, smaller pyz. make_progress() picks Qt first,
falls through to HeadlessProgress on ImportError with a stderr hint
to 'pip install PySide6'.

README: rebrand title + prose; note repo/dir rename deferred; call
out the PySide6 install step. Conflict/login dialogs are now Qt-only;
without Qt, conflict aborts (defensive) and login tells the user to
paste the token manually.

52 tests green; no test-file label changes needed since they only
exercise internal APIs.
2026-06-05 01:14:02 +02:00

85 lines
2.5 KiB
Python

"""Per-instance sync state.
Tracks the snapshot id this pack was last synced to and when. Lives at
``<pack-folder>/.cloud-sync/state.json`` (mode 600).
Purpose: divergence detection. On ``pull``, if the remote latest id
differs from ``last_pulled_snapshot_id`` AND any in-scope local file
has mtime > ``last_pulled_at``, the local and remote diverged from a
common ancestor — surface the conflict dialog.
"""
from __future__ import annotations
import json
from dataclasses import dataclass
from datetime import datetime, timezone
from pathlib import Path
SCHEMA_VERSION = 1
@dataclass(frozen=True)
class State:
last_pulled_snapshot_id: str
last_pulled_at: datetime
host_tag: str = "instance-sync"
def state_path(pack_folder: Path) -> Path:
return pack_folder / ".cloud-sync" / "state.json"
def read(pack_folder: Path) -> State | None:
"""Return parsed state or None if file missing / unreadable / wrong schema."""
p = state_path(pack_folder)
if not p.exists():
return None
try:
data = json.loads(p.read_text(encoding="utf-8"))
except (OSError, json.JSONDecodeError):
return None
if data.get("schema") != SCHEMA_VERSION:
return None
try:
return State(
last_pulled_snapshot_id=data["last_pulled_snapshot_id"],
last_pulled_at=_parse_iso(data["last_pulled_at"]),
host_tag=data.get("host_tag", "instance-sync"),
)
except (KeyError, ValueError):
return None
def write(pack_folder: Path, state: State) -> None:
"""Persist state. Creates parent dir + sets mode 600."""
p = state_path(pack_folder)
p.parent.mkdir(parents=True, exist_ok=True)
payload = {
"schema": SCHEMA_VERSION,
"last_pulled_snapshot_id": state.last_pulled_snapshot_id,
"last_pulled_at": state.last_pulled_at.astimezone(timezone.utc)
.isoformat()
.replace("+00:00", "Z"),
"host_tag": state.host_tag,
}
p.write_text(json.dumps(payload, indent=2) + "\n", encoding="utf-8")
p.chmod(0o600)
def clear(pack_folder: Path) -> None:
"""Remove state.json if present. Used when remote has zero snapshots."""
p = state_path(pack_folder)
p.unlink(missing_ok=True)
def _parse_iso(s: str) -> datetime:
"""Parse ISO-8601 with trailing Z or +HH:MM, return tz-aware UTC."""
if s.endswith("Z"):
s = s[:-1] + "+00:00"
dt = datetime.fromisoformat(s)
if dt.tzinfo is None:
dt = dt.replace(tzinfo=timezone.utc)
return dt.astimezone(timezone.utc)