fix: add platform argument to preflight calls

src/image_tools/args.py

@@ -1,6 +1,5 @@
 # This is the stackable release version
 from argparse import Namespace, ArgumentParser
-from typing import List
 import re
 import importlib.util
 import sys
@@ -43,7 +42,7 @@ def bake_args() -> Namespace:
         "--architecture",
         help="Target platform for image. Default: linux/amd64.",
         nargs="+",
-        default=["linux/amd64"],
+        default="linux/amd64",
         type=check_architecture_input,
     )
     parser.add_argument(
@@ -132,8 +131,7 @@ def preflight_args() -> Namespace:
         "-a",
         "--architecture",
         help="Target platform for image. Default: linux/amd64.",
-        nargs="+",
-        default=["linux/amd64"],
+        default="linux/amd64",
         type=check_architecture_input,
     )
     parser.add_argument(
@@ -174,7 +172,7 @@ def preflight_args() -> Namespace:
     return result
 
 
-def check_architecture_input(architecture) -> List[str]:
+def check_architecture_input(architecture: str) -> str:
     supported_arch = ["linux/amd64", "linux/arm64"]
 
     if architecture not in supported_arch:

src/image_tools/preflight.py

@@ -71,6 +71,14 @@ def preflight_commands(images: List[str], args: Namespace, conf) -> Dict[str, Co
                     f"ospid-{conf.open_shift_projects[args.product]['id']}",
                  ]
             )
+        if args.architecture:
+            cmd_args.extend(
+                ["--platform",
+                    # this argument value has already been checked against valid values with an expected prefix.
+                    # Preflight provides the same "linux/" prefix and so it must be removed here.
+                    args.architecture.split("linux/")[1],
+                 ]
+            )
         result[img] = Command(args=cmd_args)
     return result