fix(plugins): abort sibling boundary prep steps

scripts/prepare-extension-package-boundary-artifacts.mjs

@@ -33,11 +33,19 @@ export function createPrefixedOutputWriter(label, target) {
   };
 }
 
-function runNodeStep(label, args, timeoutMs) {
+function abortSiblingSteps(abortController) {
+  if (abortController && !abortController.signal.aborted) {
+    abortController.abort();
+  }
+}
+
+export function runNodeStep(label, args, timeoutMs, params = {}) {
+  const abortController = params.abortController;
   return new Promise((resolvePromise, rejectPromise) => {
     const child = spawn(process.execPath, args, {
       cwd: repoRoot,
       env: process.env,
+      signal: abortController?.signal,
       stdio: ["ignore", "pipe", "pipe"],
     });
 
@@ -52,6 +60,7 @@ function runNodeStep(label, args, timeoutMs) {
       settled = true;
       stdoutWriter.flush();
       stderrWriter.flush();
+      abortSiblingSteps(abortController);
       rejectPromise(new Error(`${label} timed out after ${timeoutMs}ms`));
     }, timeoutMs);
 
@@ -71,6 +80,11 @@ function runNodeStep(label, args, timeoutMs) {
       settled = true;
       stdoutWriter.flush();
       stderrWriter.flush();
+      if (error.name === "AbortError" && abortController?.signal.aborted) {
+        rejectPromise(new Error(`${label} canceled after sibling failure`));
+        return;
+      }
+      abortSiblingSteps(abortController);
       rejectPromise(new Error(`${label} failed to start: ${error.message}`));
     });
     child.on("close", (code) => {
@@ -85,24 +99,36 @@ function runNodeStep(label, args, timeoutMs) {
         resolvePromise();
         return;
       }
+      abortSiblingSteps(abortController);
       rejectPromise(new Error(`${label} failed with exit code ${code ?? 1}`));
     });
   });
 }
 
+export async function runNodeStepsInParallel(steps) {
+  const abortController = new AbortController();
+  const results = await Promise.allSettled(
+    steps.map((step) => runNodeStep(step.label, step.args, step.timeoutMs, { abortController })),
+  );
+  const firstFailure = results.find((result) => result.status === "rejected");
+  if (firstFailure) {
+    throw firstFailure.reason;
+  }
+}
+
 export async function main() {
   try {
-    await Promise.all([
-      runNodeStep(
-        "plugin-sdk boundary dts",
-        [tscBin, "-p", "tsconfig.plugin-sdk.dts.json"],
-        300_000,
-      ),
-      runNodeStep(
-        "plugin-sdk package boundary dts",
-        [tscBin, "-p", "packages/plugin-sdk/tsconfig.json"],
-        300_000,
-      ),
+    await runNodeStepsInParallel([
+      {
+        label: "plugin-sdk boundary dts",
+        args: [tscBin, "-p", "tsconfig.plugin-sdk.dts.json"],
+        timeoutMs: 300_000,
+      },
+      {
+        label: "plugin-sdk package boundary dts",
+        args: [tscBin, "-p", "packages/plugin-sdk/tsconfig.json"],
+        timeoutMs: 300_000,
+      },
     ]);
     await runNodeStep(
       "plugin-sdk boundary root shims",