Properly surface errors from push command

Failure exit code for `push` command is not currently forwarded as exit
code for podman-compose.
With this PR, podman-compose stops pushing when the underlying podman
command fails and forwards its exit code.

Signed-off-by: Monika Kairaityte <monika@kibit.lt>

newsfragments/fix-forwarding-exit-code-for-push-command.bugfix

@@ -0,0 +1 @@
+Implemented forwarding failure exit code from `push` command.

podman_compose.py

@@ -2799,14 +2799,18 @@ async def compose_pull(compose: PodmanCompose, args: argparse.Namespace) -> None
 
 
 @cmd_run(podman_compose, "push", "push stack images")
-async def compose_push(compose: PodmanCompose, args: argparse.Namespace) -> None:
+async def compose_push(compose: PodmanCompose, args: argparse.Namespace) -> int | None:
     services = set(args.services)
+    status = 0
     for cnt in compose.containers:
         if "build" not in cnt:
             continue
         if services and cnt["_service"] not in services:
             continue
-        await compose.podman.run([], "push", [cnt["image"]])
+        s = await compose.podman.run([], "push", [cnt["image"]])
+        if s is not None and s != 0:
+            status = s
+    return status
 
 
 def is_context_git_url(path: str) -> bool:

tests/integration/build_fail_multi/test_podman_compose_build_fail_multi.py

@@ -29,3 +29,25 @@ class TestComposeBuildFailMulti(unittest.TestCase, RunSubprocessMixin):
         )
         self.assertIn("RUN false", str(output))
         self.assertIn("while running runtime: exit status 1", str(error))
+
+    def test_push_command_fail(self) -> None:
+        # test that push command is able to return other than "0" return code
+        # "push" command fails due to several steps missing before running it (logging, tagging)
+        try:
+            output, error = self.run_subprocess_assert_returncode(
+                [
+                    podman_compose_path(),
+                    "-f",
+                    compose_yaml_path(),
+                    "push",
+                    "good",
+                ],
+                expected_returncode=125,
+            )
+        finally:
+            self.run_subprocess_assert_returncode([
+                podman_compose_path(),
+                "-f",
+                compose_yaml_path(),
+                "down",
+            ])