Inspect the image and skip the build if cached

Author: ggiguash

test/bin/mirror_registry.sh

@@ -76,6 +76,13 @@ EOF
 [[registry.mirror]]
     location = "${MIRROR_REGISTRY_URL}"
     insecure = true
+
+[[registry]]
+    prefix = ""
+    location = "localhost"
+[[registry.mirror]]
+    location = "${MIRROR_REGISTRY_URL}"
+    insecure = true
 EOF
 
 # Complete the source registry configuration to use sigstore attachments.

test/bin/pyutils/build_bootc_images.py

@@ -253,21 +253,20 @@ def should_skip(image, cached):
         # Redirect the output to the log file
         with open(cf_logfile, 'w') as logfile:
             is_cached = False
-            # Attempt copying the container image from the mirror registry to
-            # the local storage. Skip the subsequent build command if the image
-            # has already been cached.
+            # Check if the container image exists in the mirror registry and skip
+            # the subsequent build command if the image has already been cached.
             #
-            # Note: No retries. Failure to copy the image is ignored.
+            # Note: No retries. Failure to inspect the image is ignored.
             try:
-                copy_args = [
-                    "sudo", "skopeo", "copy",
+                inspect_args = [
+                    "sudo", "skopeo", "inspect",
                     "--authfile", PULL_SECRET,
                     f"docker://{MIRROR_REGISTRY}/{cf_outname}",
-                    f"containers-storage:localhost/{cf_outname}"
+                    "&>/dev/null"
                 ]
                 start = time.time()
-                common.run_command_in_shell(copy_args, dry_run, logfile, logfile)
-                common.record_junit(cf_path, "copy-image", "OK", start)
+                common.run_command_in_shell(inspect_args, dry_run, logfile, logfile)
+                common.record_junit(cf_path, "inspect-image", "OK", start)
 
                 is_cached = True
             except Exception: