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feat(packaging): a desktop-login host restarts with its desktop

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The shipped unit's PartOf=punktfunk-kde-session.service covers the
APPLIANCE route, where we start the compositor ourselves. A host on a
machine somebody logs into has no such unit: when Plasma or GNOME
restarts, the daemon keeps running while holding a Wayland socket and a
portal D-Bus connection that both died with the old compositor, and it
cannot recover either in-process. It fails quietly — the host still
listens, still answers, and every session it then serves dies at capture.
A host that mirrors a monitor idles for days between sessions, which is
the shape that finds this at the worst moment.

The drop-in binds the host to graphical-session.target: PartOf takes it
down with the session, WantedBy brings it back with the new one. Shipped
under /usr/share rather than as an active drop-in, because it is wrong
for the appliance route (which may never reach that target at all, and
would then leave the host permanently stopped) — the operator opts in.

Closes the restart half of design/per-monitor-portal-capture.md §6.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
This commit is contained in:
enricobuehler
2026-07-27 23:51:41 +02:00
co-authored by Claude Opus 5
parent 45f04f50fe
commit 19deac75fe
5 changed files with 71 additions and 0 deletions
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packaging/rpm/punktfunk.spec
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@@ -284,6 +284,11 @@ install -Dm0644 scripts/punktfunk-host.service %{buildroot}%{_userunitdir}/punkt
# The source unit's ExecStart points at the dev source tree; a packaged install has the binary at
# %{_bindir}. Rewrite it so a fresh install (no hand-rolled unit) starts the installed binary.
sed -i 's#%h/punktfunk/target/release/punktfunk-host#%{_bindir}/punktfunk-host#' %{buildroot}%{_userunitdir}/punktfunk-host.service
# Optional drop-in for a DESKTOP-LOGIN host: binds the host to graphical-session.target so a
# Plasma/GNOME restart restarts it instead of leaving it on a dead compositor connection. Shipped
# under %{_datadir}/%{name} (NOT as an active drop-in) because it is wrong for the appliance route —
# the operator copies it into ~/.config/systemd/user/punktfunk-host.service.d/ when they want it.
install -Dm0644 scripts/punktfunk-host-desktop-session.conf %{buildroot}%{_datadir}/%{name}/punktfunk-host-desktop-session.conf
# Optional headless KDE session unit (the kwin streaming appliance): brings up `kwin --virtual` on
# wayland-kde via the packaged run-headless-kde.sh, so the host's kwin backend has a session whose