app.py: include command's output in the exception

1 files changed, 5 insertions, 0 deletions

diff --git a/app.py b/app.py
index 3638151..1ed34a0 100755
--- a/app.py
+++ b/app.py
@@ -118,6 +118,11 @@ class Response:
 
 def run_do(*args, **kwargs):
     output = subprocess.run(args, stdin=DEVNULL, stdout=PIPE, stderr=STDOUT, universal_newlines=True, **kwargs)
+    # Include the output in the exception's message:
+    try:
+        output.check_returncode()
+    except Exception as e:
+        raise RuntimeError("Command's output was this:\n" + output.stdout) from e
     return output.stdout