Krzysztof kuhy Rudnicki
68ec316b28
LockConfig was one 35-field record: the lock's behaviour, the grab policy, nine colours, a type scale and a spacing scale, flat. It is now the seven behavioural knobs plus four nested records -- GrabPolicy(kind, disable_vt, retry_ms, log_every, preempt_weaker_holder), LockPalette, LockTypography and LockSpacing -- each overridden as a unit. Breaking for every constructor that passed grab=/disable_vt=/ grab_retry_ms=/preempt_weaker_holder= or a colour, and for every read of config.<colour>; hence the minor bump. screen-locker, leetcode-guard and diet-guard follow in their own commits. The two fail-open guards in the recovery loop carry per-line suppressions: catching everything is the property they exist for, and the check stays live for the next careless except. That was the last finding, so the gate now says 10. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01HHCbkJWXHjtTUaqvnHRAqA
2.5 KiB
gatelock
Shared fullscreen lock-window + HMAC log-integrity backend, extracted from three personal automation tools that each independently implemented "lock the screen with a blocking overlay until a condition is met": diet_guard, wake_alarm, and screen-locker.
Why
All three reimplemented the same tkinter fullscreen mechanics (overrideredirect,
input grab, VT-switch disable) at different levels of maturity, and the
HMAC-signed-state module had already been hand-copied between two of them
because they live in separate repos. gatelock is the one place that logic
now lives.
Install
pip install "gatelock @ git+https://github.com/kuhyx/utils@gatelock-v0.1.1#subdirectory=gatelock"
Usage
import tkinter as tk
from gatelock import GateRoot, LockConfig, LockWindow
class MyGate:
def __init__(self, *, demo_mode: bool) -> None:
self.root = GateRoot()
self.root.on_callback_error = self._handle_callback_error
config = LockConfig(mode="soft" if demo_mode else "hard")
self._lock = LockWindow(self.root, config, hooks=self)
self._lock.setup()
# ... build your widgets ...
self._lock.grab_input()
def on_focus_ready(self) -> None:
self.my_entry.focus_force()
def on_callback_error(self) -> None:
self.close()
def on_close(self) -> None:
... # release any hardware/state held while locked
def close(self) -> None:
self._lock.close()
def run(self) -> None:
self._lock.run()
LockConfig's mode preset bundles the common combination ("soft" = topmost
only, typeable, WM-escapable; "hard" = overrideredirect + global grab +
VT-disable). overrideredirect and the grab=GrabPolicy(kind=..., disable_vt=..., retry_ms=...) axes can be set explicitly to reproduce a consumer's exact prior
behavior where it diverges from the preset. Colours, type scale and spacing are
the palette, typography and spacing records (gatelock.LockPalette etc.),
overridden as a unit.
gatelock.log_integrity ports the HMAC-signed state module used by all three
projects; DEFAULT_HMAC_KEY_FILE (/etc/workout-locker/hmac.key) is
unchanged so existing signed history keeps verifying.
Development
python -m venv .venv && source .venv/bin/activate
pip install -r requirements.txt
pytest
pre-commit install && pre-commit install --hook-type pre-push