fix e2e test when you are already running a D-Bus session

linux/nix/e2e.sh

@@ -64,13 +64,21 @@ done
 GOCACHE="$(go env GOCACHE)"
 export GOCACHE
 
+# shellcheck disable=SC2329
+run_flutter_test() {
+    export DBUS_SESSION_BUS_ADDRESS="${DBUS_SESSION_BUS_ADDRESS%%;*}"
+    flutter test "$@" -d linux
+}
+export -f run_flutter_test
+
 status=0
 for file in "${files[@]}"; do
     name="$(basename "$file" .dart)"
     mkdir -p "$work/$name/data" "$work/$name/cache"
+
     XDG_DATA_HOME="$work/$name/data" XDG_CACHE_HOME="$work/$name/cache" \
         dbus-run-session --config-file="$DBUS_SESSION_CONFIG" -- \
-        flutter test "$file" -d linux \
+        bash -c 'run_flutter_test "$@"' -- "$file" \
         --dart-define="NEXUS_E2E_HOMESERVER=$homeserver" "${flutter_args[@]}" ||
         status=$?
 done

pubspec.lock

@@ -1959,5 +1959,5 @@ packages:
     source: hosted
     version: "2.2.4"
 sdks:
-  dart: ">=3.13.3 <4.0.0"
+  dart: "3.13.3"
   flutter: "3.47.4"