fix: 稳定 PaC source artifact YAML 空白

scripts/src/platform-infra-pipelines-as-code-source-artifact.test.ts

@@ -270,6 +270,20 @@ describe("source artifact serialization", () => {
     expect(first).toContain("apiVersion: tekton.dev/v1\nkind: Pipeline\n");
     expect(Bun.YAML.parse(first)).toEqual(manifest);
   });
+
+  test("empty mappings and sequences have stable whitespace without changing structure", () => {
+    const manifest = {
+      apiVersion: "tekton.dev/v1",
+      kind: "PipelineRun",
+      metadata: {},
+      spec: { params: [], workspaces: [], pipelineSpec: { tasks: [] } },
+    };
+    const serialized = pacSourceArtifactYaml(manifest);
+    expect(serialized).not.toMatch(/[\t ]+$/m);
+    expect(serialized.endsWith("\n")).toBe(true);
+    expect(serialized.endsWith("\n\n")).toBe(false);
+    expect(Bun.YAML.parse(serialized)).toEqual(manifest);
+  });
 });
 
 describe("runtime source-commit selection", () => {

scripts/src/platform-infra-pipelines-as-code-source-artifact.ts

@@ -1032,7 +1032,12 @@ function parseYamlRecord(text: string, label: string): Record<string, unknown> {
 }
 
 export function pacSourceArtifactYaml(value: Record<string, unknown>): string {
-  return `${Bun.YAML.stringify(value, null, 2).trim()}\n`;
+  const serialized = Bun.YAML.stringify(value, null, 2)
+    .split("\n")
+    .map((line) => line.replace(/[\t ]+$/u, ""))
+    .join("\n")
+    .trim();
+  return `${serialized}\n`;
 }
 
 function requiredParam(binding: PacSourceArtifactBinding, key: string): string {