don't clear scons cache in CI

selfdrive/manager.py

@@ -123,12 +123,16 @@ if not prebuilt:
       compile_output += r
 
       if retry:
-        print("scons build failed, cleaning in")
-        for i in range(3, -1, -1):
-          print("....%d" % i)
-          time.sleep(1)
-        subprocess.check_call(["scons", "-c"], cwd=BASEDIR, env=env)
-        shutil.rmtree("/tmp/scons_cache")
+        if not os.getenv("CI"):
+          print("scons build failed, cleaning in")
+          for i in range(3, -1, -1):
+            print("....%d" % i)
+            time.sleep(1)
+          subprocess.check_call(["scons", "-c"], cwd=BASEDIR, env=env)
+          shutil.rmtree("/tmp/scons_cache")
+        else:
+          print("scons build failed after retry")
+          sys.exit(1)
       else:
         # Build failed log errors
         errors = [line.decode('utf8', 'replace') for line in compile_output

selfdrive/test/process_replay/camera_replay.py

@@ -6,6 +6,7 @@ from typing import Any
 from tqdm import tqdm
 
 from common.android import ANDROID
+os.environ['CI'] = "1"
 if ANDROID:
   os.environ['QCOM_REPLAY'] = "1"
 import selfdrive.manager as manager