Merge "Add label argument for the container image build" into stable/train

releasenotes/notes/image-build-labels-97fda64f693cd8ba.yaml

@@ -0,0 +1,12 @@
+---
+features:
+  - The container image build command now has the ability to inject labels
+    into various images being constructed. To add labels into a container,
+    the argument `--label` can be specified multiple times. The value is
+    always a key=value pair and each key must be unique.
+other:
+  - The container image build label agument has the ability to do simple
+    string replacements following the python standard. Available options
+    for string replacement are `registry`, `namespace`, `prefix`,
+    `image`, `tag`, and `name`. Example usage
+    `--label component="%(prefix)s-%(name)s-container"`.

tripleoclient/v1/tripleo_container_image.py

@@ -184,6 +184,18 @@ class Build(command.Command):
                 "(default: %(default)s)"
             ),
         )
+        parser.add_argument(
+            "--label",
+            dest="labels",
+            metavar="<label-data>",
+            default=[],
+            action="append",
+            help=_(
+                "Add labels to the containers. This option can be "
+                "specified multiple times. Each label is a key=value "
+                "pair."
+            ),
+        )
         parser.add_argument(
             "--volume",
             dest="volumes",
@@ -562,6 +574,26 @@ class Build(command.Command):
                     rhel_modules.update({name: version})
                 image_config['tcib_rhel_modules'] = rhel_modules
 
+            if parsed_args.labels:
+                _desc = "OpenStack Platform {}".format(image_parsed_name)
+                label_data = image_config['tcib_labels'] = {
+                    "tcib_managed": True,
+                    "maintainer": "OpenStack TripleO Team",
+                    "description": _desc,
+                    "summary": _desc,
+                    "io.k8s.display-name": _desc,
+                }
+                for item in parsed_args.labels:
+                    key, value = item.split("=", 1)
+                    label_data[key] = value % dict(
+                        registry=parsed_args.registry,
+                        namespace=parsed_args.namespace,
+                        prefix=parsed_args.prefix,
+                        image=image_name,
+                        tag=parsed_args.tag,
+                        name=image_parsed_name,
+                    )
+
             # NOTE(cloudnull): Check if the reference config has a valid
             #                  "from" option. If the reference "from"
             #                  option is valid, it will be used.