Native glass survives an update: the daemon turns native back on when glassd is in place again; the installer restarts a running LiquidAss around the swap

- Installing while LiquidAss ran swapped the folder under the daemon: glassd's binary vanished for a
  moment, the daemon went CSS-only for good (the glass looked transparent). It now puts the shipped
  binary in place or waits for it, and turns native back on once a second.
- install.sh turns a running LiquidAss off before the swap and on again after it, on the new version.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

device/lgs_shell.py

@@ -931,7 +931,7 @@ class Shell:
             self.native_enabled, self.css_reason = False, css_reason_for(self.native_req, self.native_src)
         elif not self.glassd_path:
             self.native_enabled, self.css_reason = False, "glassd disabled"
-        elif not os.access(self.glassd_path, os.X_OK):
+        elif not os.access(self.glassd_path, os.X_OK) and not ensure_glassd(self.glassd_path):
             self.native_enabled, self.css_reason = False, "no glassd binary at start; python glass.py native-build"
         else:
             self.native_enabled, self.css_reason = True, None
@@ -2700,8 +2700,18 @@ class Shell:
             if self.gseq and not self.g_files_removed:   # native mode ended mid-session
                 self.g_files_removed = True
                 remove_glassd_files()
+            # only the binary was missing (an install swapping the folder under us, a toggle run before the
+            # install finished): native comes back as soon as a glassd is in place again
+            if self.native_requested and self.glassd_path and str(self.css_reason or "").startswith(
+                    ("glassd binary removed", "no glassd binary at start")) and ensure_glassd(self.glassd_path):
+                log("glassd: binary in place again; native layer back on")
+                self.native_enabled, self.css_reason = True, None
+                self.g_files_removed = False
+                self.g_given_up = False
+                self.tasks.append(asyncio.create_task(self.glassd_loop()))
+                self.changed.set()
             return
-        if not os.access(self.glassd_path, os.X_OK):
+        if not os.access(self.glassd_path, os.X_OK) and not ensure_glassd(self.glassd_path):
             self.disable_native("glassd binary removed")
             await self.kill_glassd()
             return
@@ -2749,7 +2759,7 @@ class Shell:
             return
         temp_streak = 0
         while not self.stopping and self.native_possible():
-            if not os.access(self.glassd_path, os.X_OK):
+            if not os.access(self.glassd_path, os.X_OK) and not ensure_glassd(self.glassd_path):
                 self.disable_native("glassd binary removed")
                 return
             # glassd needs SteamVR and something to cover (and the theme on: not dormant)

install.sh

@@ -68,6 +68,15 @@ install_app() {
     tar -xzf "$tmp/$ASSET" -C "$tmp/new"
     [ -f "$tmp/new/device/lgs.py" ] || die "the archive is not a LiquidAss release"
 
+    # A running LiquidAss is stopped for the swap (its files, glassd's binary included, vanish for a moment)
+    # and started again after it, on the new version.
+    was_on=0
+    if command -v systemctl >/dev/null 2>&1 && systemctl --user is-active --quiet lgs-shell 2>/dev/null             && [ -f "$DEST/device/lgs.py" ]; then
+        was_on=1
+        say "turning LiquidAss off for the update"
+        py "$DEST/device/lgs.py" off --quiet >/dev/null 2>&1 || true
+    fi
+
     # Swap the whole folder so files a release dropped do not linger; keep a glassd built on this headset.
     mkdir -p "$(dirname "$DEST")"
     if [ -f "$DEST/native/glassd/glassd" ] && [ ! -e "$tmp/new/native/glassd/glassd" ]; then
@@ -93,8 +102,11 @@ install_app() {
 
     v=$(cat "$DEST/VERSION" 2>/dev/null || echo "")
     say "installed ${v:+$v }in $DEST"
-    say "turn it on: dashboard bar > + > Launch Program > LiquidAss"
-    say "(already on? launch LiquidAss twice to load the new version)"
+    if [ "$was_on" = 1 ]; then
+        py "$DEST/device/lgs.py" on --quiet >/dev/null 2>&1 && say "LiquidAss is back on (the new version)"             || say "could not turn LiquidAss back on: launch it from + > Launch Program > LiquidAss"
+    else
+        say "turn it on: dashboard bar > + > Launch Program > LiquidAss"
+    fi
 }
 
 uninstall_app() {