docker: fail more gracefully on docker.py check

As this is called directly from the Makefile while determining
dependencies and it is possible the user was configured in one window
but not have credentials in the other. Let's catch the Exceptions and
deal with it quietly.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/tests/docker/docker.py b/tests/docker/docker.py
index 69e7130..2f81c6b 100755
--- a/tests/docker/docker.py
+++ b/tests/docker/docker.py
@@ -479,7 +479,12 @@ class CheckCommand(SubCommand):
     def run(self, args, argv):
         tag = args.tag
 
-        dkr = Docker()
+        try:
+            dkr = Docker()
+        except:
+            print("Docker not set up")
+            return 1
+
         info = dkr.inspect_tag(tag)
         if info is None:
             print("Image does not exist")