The key used to be merged into steamvr.vrsettings for good (reset at the
next start after disabling, via a marker). Now it is on only while SteamVR
runs and nothing depends on Nix to undo it:
- before each SteamVR start, the oneshot runs `install.sh
steamvr-debugger-arm`: the key's value goes to
~/.local/state/steam-frame-nix/steamvr-debugger.armed ("absent", "false",
"nofile"), the key is set (jq --indent 3, mode kept), and a runtime
drop-in $XDG_RUNTIME_DIR/systemd/user/steamvr.service.d/
50-steam-frame-nix-debugger.conf runs a /usr/bin-only restore script from
$XDG_RUNTIME_DIR/steam-frame-nix on ExecStopPost= (daemon-reload only when
newly written: once per boot). A key that is already true without .armed
is the user's own and never touched. The old marker migrates to .armed
("absent").
- when SteamVR stops, the key goes back to its previous value (removed if
it was absent, the file too if it only existed for the key) and .armed
is removed. .armed is the only trace a power loss can leave; the next
start or steam-frame-nix-cleanup resolves it.
- disabled: no unit and no drop-in at all; the orphan cleanup restores the
key once SteamVR is stopped (or leaves it to the runtime drop-in while it
runs).
A daemon-reload from a oneshot pulled in by a pending start job was tried
on dummy user units: the job survives and the new ExecStopPost= applies,
also on restart (stop, then the oneshot, then start).
checks.cleanup covers arming, re-arming, restoring and the user's own key.
Every module imports cleanup.nix (also exported as
homeManagerModules.cleanup), which
- puts steam-frame-nix-cleanup (install.sh cleanup) on PATH;
- runs `cleanup --orphans --quiet` after linkGeneration on every switch,
keeping what the configuration still uses (steamFrame.cleanup.keep, set
by the modules: debugger while steamvrDebugger is on, the Firefox desktop
profile's user.js while its fix applies); in a dry run it runs with
--dry-run;
- runs `cleanup --all` instead when Home Manager's `uninstall = true;` is
set (the manual uninstall route);
- removes links of older versions at paths Home Manager is about to own
before checkLinkTargets (steamFrame.cleanup.migrateLinks), which would
count as collisions otherwise.
install.sh cleanup gains --quiet (only actions, deferrals and warnings;
the header only when something is printed). The Jellyfin module's own
removal of the old shim copy goes: cleanup does it.
`install.sh cleanup [--dry-run] (--all | --orphans [--keep <artifact>]...)`
knows every file any version wrote outside the store and Home Manager's
links, removes only what is provably its own, prints every action and
reports everything else as "left alone"; a second run changes nothing.
Only bash, coreutils, findutils, grep, sed, awk and jq (all in /usr/bin on
SteamOS), so it also works piped from curl after a rollback or with Nix gone.
- SteamVR debugger: VRWebHelper.DebuggerEnabled is put back to its value
from before (steamvr-debugger.armed; the old empty marker means "absent"
and is migrated), only while SteamVR is stopped. While it runs, a runtime
drop-in (/run/user/<uid>/systemd/user/steamvr.service.d) runs a /usr/bin-only
restore script from /run/user/<uid>/steam-frame-nix when SteamVR stops.
- icon fallback links into Breeze and their manifest (dirs only if they
held nothing else; hicolor's mtime bumped so Steam rescans).
- Firefox: the desktop profile's user.js link, older user.js links and
marker-headed copies, and the values they left in prefs.js (only with the
profile closed; deferred otherwise).
- Jellyfin: the hwdec shim entries in the Flatpak override (devices=all
only when it came with them), an empty override file, the old shim copy.
- the dashboard patches' saved state: --all only; --orphans removes just
stale *.json.tmp files.
`install.sh uninstall` runs `cleanup --all` before removing Home Manager
(replacing its own ui-patches removal) and names what is deferred;
`install.sh status` shows what `cleanup --all` would do. The flake exports
it as packages.<system>.cleanup / apps.cleanup
(`nix run github:lhns/steam-frame-nix#cleanup -- --all`), and
checks.cleanup runs it against fake home and runtime dirs: every artifact
next to look-alikes that aren't ours, --dry-run, second runs, SteamVR
running (deferral, restore script), the user's own debugger key.
SteamOS's steamvr.service runs `rm -rf ~/.cache/SteamVR` on every SteamVR
start, which deletes vrwebhelper's browser profile and with it the
localStorage frame-controls kept its placements in, so they were lost on
every SteamVR restart and reboot.
steam-ui-patches: per-patch persistent state (`state = true`). The injector
keeps ~/.local/state/steam-frame-nix/ui-patches/<name>.json, seeds
window.__sfuiStore in a fresh page before the patch runs and writes the file
(atomically, on change, name-checked, max 64 KiB) when the page calls the
CDP binding __sfuiStoreSave.
frame-controls v5: placements saved there (v4 localStorage copy migrated
once, then removed). steam-close-button v8: "Steam hidden" saved there; a
restored hidden state hides Steam once if SteamVR already shows it when the
patch attaches (or first shows it before the patch sees Steam's frame).
README: "Changes outside Nix" lists the directory; install.sh uninstall
removes it.
- status lists every Home Manager user service instead of a hardcoded
docker.service (that's not a steam-frame-nix module)
- unique backup suffix per run (Home Manager aborts if *.backup exists)
- uninstall only force-kills processes still running from /nix/store
- drop fallbacks this installer never needs: old `nix show-config` /
`nix store ping`, the legacy per-user HM profile path, a PATH fallback,
grep-parsing the receipt without jq, `--flake=value`
install.sh installs Nix (nix-installer, steam-deck planner, flakes
enabled) and activates a Home Manager configuration, creating one from
the new flake template if there is none; uninstall stops Home Manager's
user services, runs home-manager uninstall and removes Nix and per-user
leftovers; status shows the current state. Works piped from curl.
Pierre Kisters