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xavierkandCommandCodeBot e27052d09a Implement runit support for Fenris monitoring (issue #84)
Deliver end-to-end native monitoring path under runit with existing
CLI/TUI controls and truthful status, preserving systemd behavior.

Changes:
- Add init system abstraction layer (src/fenris/init_system.py) that
  detects systemd vs runit and provides unified interface for timer
  control, on-demand collection, and service state queries
- Create runit service files (units/runit/) with completion-relative
  5-minute cadence, 2-minute boot delay, bounded execution (90s),
  no catch-up, and serialized runs via flock
- Update monitor.py to use abstraction layer instead of direct systemctl
- Update status.py to use abstraction layer for service state queries
- Update all packaging scripts (deb, rpm) for init-system-aware setup
- Update Makefile to install runit service files alongside systemd units
- Add 46 tests for init system abstraction layer

Spec: ADR 0008, §8.4, §8.5, §8.6, §8.7, §8.8
Closes #84

Co-authored-by: CommandCodeBot <noreply@commandcode.ai>
2026-09-15 00:15:24 +05:30

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#!/bin/sh
# postrm — deb post-removal (spec §7, §9).
#
# dpkg calls: postrm remove (after package files removed)
# postrm purge (after conffiles and config removed)
set -eu
# Detect init system
if [ -d /run/systemd/system ] || [ "$(cat /proc/1/comm 2>/dev/null)" = "systemd" ]; then
INIT_SYSTEM="systemd"
else
INIT_SYSTEM="runit"
fi
case "${1:-}" in
purge)
rm -rf /etc/fenris
rm -rf /var/lib/fenris
if getent group fenris > /dev/null 2>&1; then
groupdel fenris 2>/dev/null || true
fi
;;
remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
;;
esac
if [ "${INIT_SYSTEM}" = "systemd" ]; then
systemctl daemon-reload 2>/dev/null || true
else
# runit: clean up service directory and log
rm -rf /etc/sv/fenris-collect 2>/dev/null || true
rm -rf /var/log/fenris-collect 2>/dev/null || true
fi