From e1d4f9da23f5cbc766ed17e342f667910cd5a906 Mon Sep 17 00:00:00 2001
From: Gilles Peskine <Gilles.Peskine@arm.com>
Date: Mon, 27 Apr 2020 10:39:20 +0200
Subject: [PATCH] Error out if run from the wrong directory

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
---
 tests/scripts/run_demos.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tests/scripts/run_demos.py b/tests/scripts/run_demos.py
index fcf13cd8e9..6d86a9bf23 100755
--- a/tests/scripts/run_demos.py
+++ b/tests/scripts/run_demos.py
@@ -43,6 +43,8 @@ def run_all_demos(quiet=False):
     Return True if all demos passed and False if a demo fails.
     """
     all_demos = glob.glob('programs/*/*_demo.sh')
+    if not all_demos:
+        raise Exception('No demos found. run_demos needs to operate from the Mbed TLS toplevel directory.')
     return run_demos(all_demos, quiet=quiet)
 
 def main():