No LibreOffice in Open With: built bundle claims nothing, no image is mounted (R2.15)

scripts/build-libreoffice.sh

@@ -83,3 +83,5 @@ done
 echo "build-libreoffice.sh: dictionaries kept: $(ls "$extensions" | tr '\n' ' ')"
 # Ely's kernel defaults: Excel A1 formulas.
 cp "$root/packaging/libreoffice/ely.xcd" "$src/instdir/LibreOffice.app/Contents/Resources/registry/"
+
+"$root/scripts/inert-lo.sh" "$src/instdir/LibreOffice.app"

scripts/extract-official-lo.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# Unpacks the official kernel's libraries, never mounting the image.
+set -euo pipefail
+root=$(cd "$(dirname "$0")/.." && pwd)
+dmg=$root/engines/LibreOffice_26.2.6_MacOS_aarch64.dmg
+out=$root/engines/lo-official
+command -v 7zz >/dev/null || { echo "extract-official-lo.sh: needs 7zz (brew install sevenzip)" >&2; exit 1; }
+[ -f "$dmg" ] || { echo "extract-official-lo.sh: no $dmg" >&2; exit 1; }
+[ "$(stat -f %z "$dmg")" = 297798926 ] || { echo "extract-official-lo.sh: $dmg is not the pinned image" >&2; exit 1; }
+work=$(mktemp -d)
+trap 'rm -rf "$work"' EXIT
+7zz x -y -snld -o"$work" "$dmg" "LibreOffice/LibreOffice.app/Contents/Frameworks/*" "LibreOffice/LibreOffice.app/Contents/Resources/*" >/dev/null
+rm -rf "$out"
+mkdir -p "$out"
+# A plain folder, not a bundle: nothing for macOS to register.
+mv "$work/LibreOffice/LibreOffice.app/Contents" "$out/Contents"
+echo "extract-official-lo.sh: $out/Contents/Frameworks"

scripts/inert-lo.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# The built LibreOffice bundle holds libraries, nothing to register.
+set -euo pipefail
+app=${1:?usage: scripts/inert-lo.sh path/to/LibreOffice.app}
+plist=$app/Contents/Info.plist
+[ -f "$plist" ] || { echo "inert-lo.sh: no $plist" >&2; exit 1; }
+lsregister=/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister
+for key in CFBundleDocumentTypes CFBundleURLTypes UTExportedTypeDeclarations UTImportedTypeDeclarations; do
+  if /usr/libexec/PlistBuddy -c "Print :$key" "$plist" >/dev/null 2>&1; then
+    /usr/libexec/PlistBuddy -c "Delete :$key" "$plist"
+  fi
+done
+rm -rf "$app/Contents/PlugIns" "$app/Contents/Library/Spotlight"
+"$lsregister" -u "$app"
+# Spotlight would find the bundle and register it again.
+touch "$(cd "$app/../../.." && pwd)/.metadata_never_index"
+echo "inert-lo.sh: $app claims no files and is unregistered"