testsAndMisc/python_pkg/diet_guard/diet-guard-gate.service

[Unit]
Description=Diet Guard log-to-unlock gate (periodic check)
After=graphical-session.target

[Service]
Type=oneshot
# DISPLAY/PYTHONPATH mirror wake-alarm.service: the gate opens a Tk window when a
# lock is due, so without DISPLAY it would crash with "no display name and no
# $DISPLAY" before it could even check. The command self-checks gate_is_due() and
# exits 0 when no lock is needed, so running it every ~30 min is cheap.
#
# XAUTHORITY pins the X auth cookie path explicitly. It is belt-and-suspenders,
# not the fix: when this unit fires at SESSION START (Persistent=true catch-up),
# it can beat the display manager writing ~/.Xauthority, so the cookie is simply
# absent yet -- pointing at it does not help. That race is handled in Python by
# wait_for_display(), which polls the display until it is connectable before
# opening the window (previously a session-start launch died on a "couldn't
# connect to display" TclError and never showed). The sleep gives the session a
# brief head start; the Python wait is what makes it reliable.
Environment=DISPLAY=:0
Environment=XAUTHORITY=%h/.Xauthority
Environment=PYTHONPATH=%h/testsAndMisc
ExecStartPre=/bin/sleep 1
ExecStart=/usr/bin/python -m python_pkg.diet_guard gate
WorkingDirectory=%h/testsAndMisc
feat(diet_guard): add meal-logging screen-lock gate with trigger fix Add the diet_guard package: a screen-locking meal-logging gate that fires on 4-hour slots (08/12/16/20) and records calories/macros, persisting an autocompleting food bank. - Trigger fix: the systemd timer fires at session start (Persistent=true) before lightdm has written ~/.Xauthority, so the gate crashed with a TclError instead of locking the screen. Add wait_for_display() / _display_is_ready() in _gatelock.py and wire it into _cli._cmd_gate so the gate retries on the next tick instead of crashing; add Environment=XAUTHORITY=%h/.Xauthority to the service as belt-and-suspenders. - Food-bank hardening: a transiently corrupt food_bank.json was warned about on every keystroke and then silently overwritten (data loss). _read_bank now quarantines it via _quarantine_corrupt_bank() (warn-once + timestamped backup) before starting fresh. - Multi-item meals: new _meal.py (MealItem, meal_total, MEAL_SOURCE), remember_meal() + _upsert() in _foodbank.py, and a "+ Add item" control in the gate that logs both the individual items and the composite meal. - Bundle resolve_nutrition's manual macros into a ManualMacros dataclass to stay within the argument-count limit. diet_guard at 100% branch coverage; full pre-commit suite passes. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> 2026-06-10 22:31:18 +02:00			`[Unit]`
			`Description=Diet Guard log-to-unlock gate (periodic check)`
			`After=graphical-session.target`

			`[Service]`
			`Type=oneshot`
			`# DISPLAY/PYTHONPATH mirror wake-alarm.service: the gate opens a Tk window when a`
			`# lock is due, so without DISPLAY it would crash with "no display name and no`
			`# $DISPLAY" before it could even check. The command self-checks gate_is_due() and`
			`# exits 0 when no lock is needed, so running it every ~30 min is cheap.`
			`#`
			`# XAUTHORITY pins the X auth cookie path explicitly. It is belt-and-suspenders,`
			`# not the fix: when this unit fires at SESSION START (Persistent=true catch-up),`
			`# it can beat the display manager writing ~/.Xauthority, so the cookie is simply`
			`# absent yet -- pointing at it does not help. That race is handled in Python by`
			`# wait_for_display(), which polls the display until it is connectable before`
			`# opening the window (previously a session-start launch died on a "couldn't`
			`# connect to display" TclError and never showed). The sleep gives the session a`
			`# brief head start; the Python wait is what makes it reliable.`
			`Environment=DISPLAY=:0`
			`Environment=XAUTHORITY=%h/.Xauthority`
			`Environment=PYTHONPATH=%h/testsAndMisc`
			`ExecStartPre=/bin/sleep 1`
			`ExecStart=/usr/bin/python -m python_pkg.diet_guard gate`
			`WorkingDirectory=%h/testsAndMisc`