Get image id.

task/buildah-rootless-daemonless/0.1/buildah-rootless-daemonless.yaml

@@ -98,7 +98,8 @@ spec:
             additional_args+=(--ssh default=\$SSH_AUTH_SOCK)
         fi
 
-        exec buildah build "\${additional_args[@]}" "\${@}"
+        buildah build "\${additional_args[@]}" "\${@}"
+        exec buildah push --storage-driver overlay $(params.OUTPUT)
 
         EOF
         chmod +x /home/build/.config/containers/entrypoint.sh
@@ -162,20 +163,17 @@ spec:
     - name: read-metadata
       image: python:3.13-alpine3.20
       workingDir: "$(workspaces.source.path)"
+      # at this point /home/build/.metadata/image_id has contents like:
+      #   sha256:7102ad507cf1b0c8adfa99a081ddfd0b5dc11e2d971162316753a58ce2b7f6ca
       script: |
-        #!/usr/bin/env bash
-        cat /home/build/.metadata/image_id
-        echo "---"
         #!/usr/bin/env python
         import json
-        with open("/home/build/.metadata/build.json", "r") as f:
-            meta_body = f.read()
-            print(meta_body)
-            meta = json.loads(meta_body)
+        with open("/home/build/.metadata/image_id", "r") as f:
+            image_id = f.read()
         with open("$(results.IMAGE_DIGEST.path)", "w") as f:
-            print(meta["containerimage.digest"], file=f, end="")
+            print(json.dumps([image_id]), file=f, end="")
         with open("$(results.IMAGE_URL.path)", "w") as f:
-            print(json.dumps(meta["image.name"].split(",")), file=f, end="")
+            print(json.dumps(["$(params.OUTPUT)"]), file=f, end="")
       volumeMounts:
         - name: metadata-out
           mountPath: /home/build/.metadata