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Krzysztof kuhy Rudnicki
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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
76 lines
2.5 KiB
Markdown
76 lines
2.5 KiB
Markdown
# gatelock
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Shared fullscreen lock-window + HMAC log-integrity backend, extracted from
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three personal automation tools that each independently implemented "lock the
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screen with a blocking overlay until a condition is met":
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[diet_guard](https://github.com/kuhyx/testsAndMisc/tree/main/python_pkg/diet_guard),
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[wake_alarm](https://github.com/kuhyx/testsAndMisc/tree/main/python_pkg/wake_alarm),
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and [screen-locker](https://github.com/kuhyx/screen-locker).
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## Why
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All three reimplemented the same tkinter fullscreen mechanics (overrideredirect,
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input grab, VT-switch disable) at different levels of maturity, and the
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HMAC-signed-state module had already been hand-copied between two of them
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because they live in separate repos. `gatelock` is the one place that logic
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now lives.
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## Install
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```bash
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pip install "gatelock @ git+https://github.com/kuhyx/utils@gatelock-v0.1.1#subdirectory=gatelock"
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```
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## Usage
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```python
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import tkinter as tk
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from gatelock import GateRoot, LockConfig, LockWindow
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class MyGate:
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def __init__(self, *, demo_mode: bool) -> None:
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self.root = GateRoot()
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self.root.on_callback_error = self._handle_callback_error
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config = LockConfig(mode="soft" if demo_mode else "hard")
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self._lock = LockWindow(self.root, config, hooks=self)
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self._lock.setup()
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# ... build your widgets ...
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self._lock.grab_input()
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def on_focus_ready(self) -> None:
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self.my_entry.focus_force()
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def on_callback_error(self) -> None:
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self.close()
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def on_close(self) -> None:
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... # release any hardware/state held while locked
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def close(self) -> None:
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self._lock.close()
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def run(self) -> None:
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self._lock.run()
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```
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`LockConfig`'s `mode` preset bundles the common combination ("soft" = topmost
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only, typeable, WM-escapable; "hard" = overrideredirect + global grab +
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VT-disable). `overrideredirect` and the `grab=GrabPolicy(kind=..., disable_vt=...,
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retry_ms=...)` axes can be set explicitly to reproduce a consumer's exact prior
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behavior where it diverges from the preset. Colours, type scale and spacing are
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the `palette`, `typography` and `spacing` records (`gatelock.LockPalette` etc.),
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overridden as a unit.
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`gatelock.log_integrity` ports the HMAC-signed state module used by all three
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projects; `DEFAULT_HMAC_KEY_FILE` (`/etc/workout-locker/hmac.key`) is
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unchanged so existing signed history keeps verifying.
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## Development
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```bash
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python -m venv .venv && source .venv/bin/activate
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pip install -r requirements.txt
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pytest
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pre-commit install && pre-commit install --hook-type pre-push
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```
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