ci: reuse build artifacts for gateway topology

scripts/check-gateway-watch-regression.mjs

@@ -7,8 +7,9 @@ import os from "node:os";
 import path from "node:path";
 import process from "node:process";
 import { pathToFileURL } from "node:url";
-import { writeBuildStamp } from "./build-stamp.mjs";
+import { resolveGitHead, writeBuildStamp } from "./build-stamp.mjs";
 import { resolveBuildRequirement } from "./run-node.mjs";
+import { runRuntimePostBuild } from "./runtime-postbuild.mjs";
 
 const DEFAULTS = {
   outputDir: path.join(process.cwd(), ".local", "gateway-watch-regression"),
@@ -42,6 +43,9 @@ function parseArgs(argv) {
   for (let i = 0; i < argv.length; i += 1) {
     const arg = argv[i];
     const next = argv[i + 1];
+    if (arg === "--") {
+      continue;
+    }
     const readValue = () => {
       if (!next) {
         throw new Error(`Missing value for ${arg}`);
@@ -579,6 +583,31 @@ function buildRunNodeDeps(env) {
   };
 }
 
+function writeRuntimePostBuildStamp(cwd) {
+  const stampPath = path.join(cwd, "dist", ".runtime-postbuildstamp");
+  fs.mkdirSync(path.dirname(stampPath), { recursive: true });
+  const head = resolveGitHead({ cwd, spawnSync });
+  fs.writeFileSync(
+    stampPath,
+    `${JSON.stringify(
+      {
+        syncedAt: Date.now(),
+        ...(head ? { head } : {}),
+      },
+      null,
+      2,
+    )}\n`,
+    "utf8",
+  );
+}
+
+function prepareSkippedBuildRuntimeArtifacts() {
+  const cwd = process.cwd();
+  runRuntimePostBuild({ cwd, env: process.env });
+  writeBuildStamp({ cwd });
+  writeRuntimePostBuildStamp(cwd);
+}
+
 async function main() {
   const options = parseArgs(process.argv.slice(2));
   ensureDir(options.outputDir);
@@ -588,6 +617,8 @@ async function main() {
     // Refresh the build stamp after the CI artifact build finishes so run-node
     // does not spuriously rebuild inside the bounded watch window.
     writeBuildStamp({ cwd: process.cwd() });
+  } else {
+    prepareSkippedBuildRuntimeArtifacts();
   }
 
   const preflightBuildRequirement = resolveBuildRequirement(buildRunNodeDeps(process.env));