The sweep asked `app_label()` whether a package still needed a label, and
that accessor answers "what should be displayed" — so a definitive negative
(a package whose pm dump ran and carried no label) came back as None,
indistinguishable from "never asked". Every sweep therefore re-dumped every
label-less package, throwing away the 24 h cache the label path exists for,
and a second sweep cost a full dump round for the whole app list.
`_known_label(package) -> (known, label)` is the accessor that keeps the two
apart: known-and-empty means the device already answered, so the row falls
back to its package id with ZERO further round trips. A forced re-sweep now
issues only the two list commands.
Pinned by tests: a second sweep dumps nothing at all (negatives included),
and a package whose fetch FAILED (no output — the UNIT 0 rule) stays
uncached and is retried by the next sweep, recovering its label.
The live complaint ("it doesn't find all the apps") came from the curated
list: only four packages were ever offered, so anything the user had
installed elsewhere was invisible. The device knows its own apps.
ha_adb_common/installed_apps.py parses the two queries the sweep makes:
* `pm list packages -3` — every third-party (user-installed) package;
* `cmd package resolve-activity --brief -c android.intent.category.HOME`
— the ACTIVE launcher, a system app that is nonetheless what the user
opens, so it is appended rather than filtered away.
System apps are otherwise not enumerated (a Shield ships a few hundred and
they are not launchable apps); the parsers are tolerant of the noise a real
adb shell can prepend and of duplicate lines.
ShieldConnectionManager gains the sweep:
`async_refresh_installed_apps(force=False)` returns a cached
`[{package, name, icon}]` table, and `installed_apps()` is a pure read that
never issues a shell — so a state poll costs nothing.
Naming stays on the one path: the sweep calls `_dump_label`, the same
`pm dump` + parse + 24 h cache the entity path uses, now extracted so the
two cannot drift, including the t57 UNIT 0 rule that a fetch that returned
nothing is NOT cached. Labels are fetched APP_SWEEP_CONCURRENCY (4) at a
time with APP_SWEEP_SPACING (50 ms), so a typical Shield finishes in
seconds rather than the minutes a one-per-watchdog-cycle drain would take
while the socket still sees a trickle.
Failure is a normal outcome: no poller, a disconnected transport or a mute
shell stores an EMPTY table with a stamp and returns [], so nothing retries
in a loop and every surface degrades to "no discovered apps".
Icons: `pm dump` does NOT expose an app's icon resource — an extracted
APK's icon is a bitmap only its own code resolves — so this is honestly a
heuristic: APP_ICON_FALLBACKS (a curated package -> mdi: map) with
APP_ICON_GENERIC (mdi:television) for anything unknown, and always a string.
t59 F1 (HIGH). `ShieldAdbPoller.shell` swallows its error and answers None
(adb_client.py:144-155), and `_fetch_app_label` read that as "the dump
ran and found no label" → `cache_app_label(pkg, None)` → `('', stamp,
resolved=True)`. That is a DEFINITIVE negative for APP_LABEL_TTL = 24 h,
so after ONE transient failure `app_label()` never re-enqueued, exactly
one `pm dump` was ever attempted, and a later good dump could not
recover the label — `sensor.native_value` and `media_player.app_name`
stayed on the package id for every later render.
The dump now carries an exit marker (`; echo __NSH_EXIT:$?`), so the
three outcomes are distinguishable:
* output with an `application-label` → cache the label;
* output that ran and carried none (the marker is still there) → cache
the empty string, the definitive negative that keeps t24 F1's
zero-round-trip rule for a genuinely label-less package;
* no output at all (`None`, or blank) → cache NOTHING and let the next
render re-enqueue, logged at debug.
The `resolved` flag goes with it: `cache_app_label` was its only writer
and always passed True, so an entry in `_app_labels` is now simply "a
fetch RAN" and the dead third field (`(label, stamp, True)`) is gone.
Tests drive the FakePoller-returns-None AND returns-'' shapes through
the sensor and through `media_player.app_name`, plus the label-less
package that must still be negatively cached. The stub poller now models
both real outcomes of a dump (an answer, or a transport that delivered
nothing) instead of conflating them — which is why the old tests could
only pin the raising-shell branch that already worked. 4 of the new
tests fail on the pre-fix tree, showing `('', stamp, True)` stamped.
Also in this commit:
- t59 F3: running_apps.py set `app["state"] = "paused"` twice — one line.
- t59 F4: no captured fixture contains state=6, so the "the Shield's own
sessions report 6 like stock Android" wording in README and the
media_session/media_player docstrings is reworded as INFERRED from the
`state=PlaybackState {state=N, …}` line shape. A `git notes` entry on
07682ff records the same correction against the t55 commit body.
The Current App sensor and media_player.app_name showed a package id in
the live run. Root cause was in the manifest-label tier: `_fetch_app_label`
returned early (no poller, ADB down) or logged and returned on a shell
error WITHOUT touching the cache, but `app_label` had already put the
package in `_app_label_requests`; the drain then threw the request away,
so a render between the failure and the next cycle re-enqueued — while
nothing distinguished "the device answered, this package has no label"
from "we never got an answer". Nothing was visibly retried, and the label
tier could stay silent indefinitely.
The cache is now (label, stamp, resolved) and records the FETCH, not the
wishful result:
* a fetch that RAN caches its outcome for APP_LABEL_TTL — the label, or
the empty string for a genuinely label-less package. Definitive: no
re-enqueue, so the t24 F1 per-heartbeat round-trip tax stays closed.
* a fetch that could NOT run stamps nothing, logs at debug (so a
package id in the UI is diagnosable), and the next render retries.
* a queued or in-flight fetch is not enqueued twice, so a burst of
renders still costs one `pm dump` per watchdog cycle.
`cache_app_label()` is the one public writer of the cache (tests and any
future out-of-band reader no longer poke the private tuple), and
`app_label_requests`/`app_label_inflight` expose the queue for tests.
The old 2-tuple seeds in the label tests move to `cache_app_label`.
James Mackay