Some tests perform custom regression scenarios.

regression.py

@@ -47,12 +47,16 @@ def build_me(folder):
             os.system("cp build.log $CIRCLE_ARTIFACTS/" + folder + "_build.log")
         if res != 0:
             return folder, False, "Build failed..."
-        if os.path.exists("regression.py"):
-            res = os.system("./regression.py > regression.log 2>&1 || exit 1")
-            if os.getenv("CIRCLE_ARTIFACTS") is not None:
-                os.system("cp regression.log $CIRCLE_ARTIFACTS/" + folder + "_regression.log")
-            if res != 0:
-                return folder, False, "Regression check failed..."
+        for cmd in ["./regression.sh", "./regression.py"]:
+            if os.path.exists(cmd):
+                break
+        else:
+            return folder, True, "OK"
+        res = os.system(cmd + " > regression.log 2>&1 || exit 1")
+        if os.getenv("CIRCLE_ARTIFACTS") is not None:
+            os.system("cp regression.log $CIRCLE_ARTIFACTS/" + folder + "_regression.log")
+        if res != 0:
+            return folder, False, "Regression check failed..."
         return folder, True, "OK"
     finally:
         os.chdir(root)