RFC: config: add streams[].skip_cloud_images

docs/config.yaml

@@ -64,6 +64,9 @@ streams:
       type: production
       # OPTIONAL: override cosa image to use for this stream
       cosa_image: "quay.io/jlebon/coreos-assembler:stable"
+      # OPTIONAL: Whether to skip cloud image generation and upload. This is
+      # equivalent to listing all cloud platforms in `skip_artifacts`.
+      skip_cloud_images: true
       # OPTIONAL: skip some of the default artifacts for this stream
       skip_artifacts:
         aarch64:

utils.groovy

@@ -355,6 +355,13 @@ def get_artifacts_to_build(pipecfg, stream, basearch) {
         artifacts -= pipecfg.streams[stream].skip_artifacts?.all ?: []
         artifacts -= pipecfg.streams[stream].skip_artifacts?."${basearch}" ?: []
     }
+    if (pipecfg.streams[stream].skip_cloud_images) {
+        // Only keep containers and live artifacts. Note that the ostree
+        // container and QEMU image are always built and not skippable
+        // artifacts.
+        artifacts = artifacts.intersect(["extensions-container", "legacy-oscontainer",
+                                         "live", "metal", "metal4k"])
+    }
     return artifacts.unique()
 }