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punktfunk/clients
enricobuehlerandClaude Opus 5 6cf5d4ab87
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feat(client/linux): punktfunk:// links open the GTK client
D1's activation half (design/client-deep-links.md §4.1). The client already had a
`--connect` CLI, but nothing claimed the scheme, so nothing outside a terminal could
start a stream: no browser prompt, no xdg-open, no double-clickable shortcut.

The `.desktop` entries gain `MimeType=x-scheme-handler/punktfunk;` and `Exec=… %u`, and
the rpm scriptlet joins deb and arch in running `update-desktop-database` — an entry
nothing indexes claims nothing. (nix substitutes the Exec line by prefix, so `%u`
survives; flatpak's exported entry is renamed to the app id by the standard mechanism.)

In the app, `HANDLES_OPEN` plus a positional-URL argv is the whole mechanism, and the
second half is the interesting one: argv stays withheld from GApplication as before
EXCEPT when it carries a URL, and then GIO's own single-instance forwarding delivers it
to the running window over D-Bus. Clicking a link with Punktfunk already open reuses that
window instead of racing a second instance, and we wrote no IPC to get it. A URL that
lands during a cold start (before the model exists) is parked rather than dropped —
silently losing a link is the one outcome that would make the feature untrustworthy.

Routing is four lines of translation, because the decisions are the brain's: parse,
resolve the host, resolve the profile, refuse. A link that resolves becomes exactly the
message a card click raises — the same wake, trust gate, and error surfaces — so there is
no second connect path to keep in sync. A link to a host we don't know, or know but never
pinned, opens the ordinary PIN ceremony seeded with what the link claimed, which is how
"a URL may never pair or trust on its own" stays true while still being useful. Never
preempting a live session is checked here, since only this layer knows one is running.

Verified on .21 under Xvfb against hand-authored stores: `connect/Bound%20Box?launch=`
resolved the host by name, carried the launch id through the trust gate, and spawned the
session; `punktfunk://pair/1234` and an unknown `profile=` both refused before any dial.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-07-28 21:37:10 +02:00
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