Preload opencv at setup

WillB97 · WillB97 · commit 7884e42c4eda · 2025-09-03T21:54:35.000+01:00
Avoids a long hang when first running the simulator
diff --git a/scripts/setup.py b/scripts/setup.py
@@ -99,6 +99,9 @@ def populate_python_config(runtime_ini: Path, venv_python: Path) -> None:
         cwd=venv_dir,
     )
 
+    logger.info("Preloading OpenCV")
+    check_call([str(venv_python), "-c", "import cv2"], cwd=venv_dir)
+
     logger.info("Setting up Webots Python location")
 
     controllers_dir = project_root / "simulator/controllers"

Original file line number	Diff line number	Diff line change
`@@ -99,6 +99,9 @@ def populate_python_config(runtime_ini: Path, venv_python: Path) -> None:`
`99`	`99`	`cwd=venv_dir,`
`100`	`100`	`)`
`101`	`101`
	`102`	`+ logger.info("Preloading OpenCV")`
	`103`	`+ check_call([str(venv_python), "-c", "import cv2"], cwd=venv_dir)`
	`104`	`+`
`102`	`105`	`logger.info("Setting up Webots Python location")`
`103`	`106`
`104`	`107`	`controllers_dir = project_root / "simulator/controllers"`