1 files changed, 29 insertions, 27 deletions
diff --git a/tests/docker/docker.py b/tests/docker/docker.py
index 0435a55d10..9b3425fec2 100755
--- a/tests/docker/docker.py
+++ b/tests/docker/docker.py
@@ -523,7 +523,7 @@ class UpdateCommand(SubCommand):
     def args(self, parser):
         parser.add_argument("tag",
                             help="Image Tag")
-        parser.add_argument("executable",
+        parser.add_argument("--executable",
                             help="Executable to copy")
 
     def run(self, args, argv):
@@ -532,35 +532,37 @@ class UpdateCommand(SubCommand):
         tmp = tempfile.NamedTemporaryFile(suffix="dckr.tar.gz")
         tmp_tar = TarFile(fileobj=tmp, mode='w')
 
-        # Add the executable to the tarball, using the current
-        # configured binfmt_misc path. If we don't get a path then we
-        # only need the support libraries copied
-        ff, enabled = _check_binfmt_misc(args.executable)
-
-        if not enabled:
-            print("binfmt_misc not enabled, update disabled")
-            return 1
-
-        if ff:
-            tmp_tar.add(args.executable, arcname=ff)
-
-        # Add any associated libraries
-        libs = _get_so_libs(args.executable)
-        if libs:
-            for l in libs:
-                so_path = os.path.dirname(l)
-                name = os.path.basename(l)
-                real_l = os.path.realpath(l)
-                try:
-                    tmp_tar.add(real_l, arcname="%s/%s" % (so_path, name))
-                except FileNotFoundError:
-                    print("Couldn't add %s/%s to archive" % (so_path, name))
-                    pass
-
         # Create a Docker buildfile
         df = StringIO()
         df.write(u"FROM %s\n" % args.tag)
-        df.write(u"ADD . /\n")
+
+        if args.executable:
+            # Add the executable to the tarball, using the current
+            # configured binfmt_misc path. If we don't get a path then we
+            # only need the support libraries copied
+            ff, enabled = _check_binfmt_misc(args.executable)
+
+            if not enabled:
+                print("binfmt_misc not enabled, update disabled")
+                return 1
+
+            if ff:
+                tmp_tar.add(args.executable, arcname=ff)
+
+            # Add any associated libraries
+            libs = _get_so_libs(args.executable)
+            if libs:
+                for l in libs:
+                    so_path = os.path.dirname(l)
+                    name = os.path.basename(l)
+                    real_l = os.path.realpath(l)
+                    try:
+                        tmp_tar.add(real_l, arcname="%s/%s" % (so_path, name))
+                    except FileNotFoundError:
+                        print("Couldn't add %s/%s to archive" % (so_path, name))
+                        pass
+
+            df.write(u"ADD . /\n")
 
         df_bytes = BytesIO(bytes(df.getvalue(), "UTF-8"))