ci: save kustomize build output to files for artifact upload

- Modify run_kustomize_build to return the built YAML output
- Save output.yaml to .build-test/ for both rhoso components and examples
- This enables the workflow artifact to contain the built manifests

Made-with: opencode
Model: big-pickle (opencode/big-pickle)

Author: cjeanner

.github/scripts/verify-kustomize-builds.py

@@ -153,8 +153,8 @@ def generate_kustomization(
     )
 
 
-def run_kustomize_build(build_dir: Path) -> tuple[bool, str]:
-    """Run kustomize build in build_dir. Return (success, error_message)."""
+def run_kustomize_build(build_dir: Path) -> tuple[bool, str, str]:
+    """Run kustomize build in build_dir. Return (success, error_message, output)."""
     try:
         result = subprocess.run(
             ["kustomize", "build", "."],
@@ -164,29 +164,35 @@ def run_kustomize_build(build_dir: Path) -> tuple[bool, str]:
             timeout=60,
         )
         if result.returncode == 0:
-            return True, ""
-        return False, result.stderr or result.stdout or f"Exit code {result.returncode}"
+            return True, "", result.stdout
+        return False, result.stderr or result.stdout or f"Exit code {result.returncode}", ""
     except subprocess.TimeoutExpired:
-        return False, "Command timed out after 60s"
+        return False, "Command timed out after 60s", ""
     except FileNotFoundError:
-        return False, "kustomize not found in PATH"
+        return False, "kustomize not found in PATH", ""
     except Exception as e:
-        return False, str(e)
+        return False, str(e), ""
 
 
 def build_and_collect(
     test_case: BuildTestCase, repo_root: Path, build_base: Path
 ) -> BuildResult:
     """Generate kustomization (or use source dir), run build, return result."""
     if test_case.source_directory is not None:
-        # Build directly from the example directory (tests refs, patches, etc. as committed)
         build_dir = test_case.source_directory
+        output_dir = build_base / test_case.build_dir_name
     else:
         build_dir = build_base / test_case.build_dir_name
         build_dir.mkdir(parents=True, exist_ok=True)
         generate_kustomization(build_dir, test_case.component_paths, repo_root)
+        output_dir = build_dir
 
-    success, error = run_kustomize_build(build_dir)
+    success, error, output = run_kustomize_build(build_dir)
+
+    if success and output:
+        output_dir.mkdir(parents=True, exist_ok=True)
+        output_file = output_dir / "output.yaml"
+        output_file.write_text(output)
 
     return BuildResult(
         test_case=test_case,