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-rwxr-xr-xtests/docker/docker.py16
1 files changed, 11 insertions, 5 deletions
diff --git a/tests/docker/docker.py b/tests/docker/docker.py
index 2d67bbd15a..c9f20d8d09 100755
--- a/tests/docker/docker.py
+++ b/tests/docker/docker.py
@@ -306,14 +306,18 @@ class Docker(object):
         checksum = _text_checksum(_dockerfile_preprocess(dockerfile))
 
         if registry is not None:
-            # see if we can fetch a cache copy, may fail...
-            pull_args = ["pull", "%s/%s" % (registry, tag)]
-            if self._do(pull_args, quiet=quiet) == 0:
+            sources = re.findall("FROM qemu\/(.*)", dockerfile)
+            # Fetch any cache layers we can, may fail
+            for s in sources:
+                pull_args = ["pull", "%s/qemu/%s" % (registry, s)]
+                if self._do(pull_args, quiet=quiet) != 0:
+                    registry = None
+                    break
+            # Make substitutions
+            if registry is not None:
                 dockerfile = dockerfile.replace("FROM qemu/",
                                                 "FROM %s/qemu/" %
                                                 (registry))
-            else:
-                registry = None
 
         tmp_df = tempfile.NamedTemporaryFile(mode="w+t",
                                              encoding='utf-8',
@@ -339,6 +343,8 @@ class Docker(object):
             build_args += ["--build-arg", "BUILDKIT_INLINE_CACHE=1"]
 
         if registry is not None:
+            pull_args = ["pull", "%s/%s" % (registry, tag)]
+            self._do(pull_args, quiet=quiet)
             cache = "%s/%s" % (registry, tag)
             build_args += ["--cache-from", cache]
         build_args += argv