speedup prebuilt check (#31065)

* speedup prebuilt check

* one place

launch_chffrplus.sh

@@ -72,14 +72,19 @@ function launch {
   export PYTHONPATH="$PWD"
 
   # hardware specific init
-  agnos_init
+  if [ -f /AGNOS ]; then
+    agnos_init
+  fi
 
   # write tmux scrollback to a file
   tmux capture-pane -pq -S-1000 > /tmp/launch_log
 
   # start manager
   cd selfdrive/manager
-  ./build.py && ./manager.py
+  if [ ! -f $DIR/prebuilt ]; then
+    ./build.py
+  fi
+  ./manager.py
 
   # if broken, keep on screen error
   while true; do sleep 1; done

selfdrive/manager/build.py

@@ -17,7 +17,6 @@ CACHE_DIR = Path("/data/scons_cache" if AGNOS else "/tmp/scons_cache")
 
 TOTAL_SCONS_NODES = 2560
 MAX_BUILD_PROGRESS = 100
-PREBUILT = os.path.exists(os.path.join(BASEDIR, 'prebuilt'))
 
 def build(spinner: Spinner, dirty: bool = False, minimal: bool = False) -> None:
   env = os.environ.copy()
@@ -85,7 +84,7 @@ def build(spinner: Spinner, dirty: bool = False, minimal: bool = False) -> None:
     f.unlink()
 
 
-if __name__ == "__main__" and not PREBUILT:
+if __name__ == "__main__":
   spinner = Spinner()
   spinner.update_progress(0, 100)
   build(spinner, is_dirty(), minimal = AGNOS)