Initial commit

2026-06-29 15:11:48 -07:00
commit 66dfdcc58d
404 changed files with 45970 additions and 0 deletions
@@ -0,0 +1,51 @@
+import { cpSync, existsSync, mkdirSync } from "node:fs";
+import { dirname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+import { spawnSync } from "node:child_process";
+
+const HERE = dirname(fileURLToPath(import.meta.url));
+
+/** The canonical build harness shipped with the compiler (has package.json + lock). */
+export function baseHarnessDir(): string {
+  // packages/worker/src → ../../../compiler/.harness
+  return join(HERE, "..", "..", "..", "compiler", ".harness");
+}
+
+function hasBuildDeps(dir: string): boolean {
+  return existsSync(join(dir, "node_modules", ".bin", "next"))
+    && existsSync(join(dir, "node_modules", ".bin", "vite"));
+}
+
+/**
+ * Ensure `targetDir` is a ready-to-build app harness with deps installed — the
+ * isolation seam for `verify` (each worker uses its OWN harness so concurrent
+ * framework builds never collide). Reuses the base harness's deps when present
+ * (fast copy), otherwise runs `npm install` from its package.json. Idempotent.
+ */
+export function provisionHarness(targetDir: string, baseDir = baseHarnessDir()): string {
+  if (hasBuildDeps(targetDir)) return targetDir;
+  mkdirSync(targetDir, { recursive: true });
+  if (baseDir !== targetDir) {
+    for (const f of ["package.json", "package-lock.json"]) {
+      if (existsSync(join(baseDir, f))) cpSync(join(baseDir, f), join(targetDir, f));
+    }
+  }
+  if (hasBuildDeps(baseDir) && baseDir !== targetDir) {
+    cpSync(join(baseDir, "node_modules"), join(targetDir, "node_modules"), { recursive: true });
+  } else if (!hasBuildDeps(targetDir)) {
+    const r = spawnSync("npm", ["install", "--no-audit", "--no-fund"], { cwd: targetDir, encoding: "utf8", stdio: "inherit" });
+    if (r.status !== 0) throw new Error("harness npm install failed in " + targetDir);
+  }
+  return targetDir;
+}
+
+/** A memoized provisioner: provisions once, then returns the same dir. */
+export function makeHarnessProvider(targetDir: string): () => Promise<string> {
+  let ready: string | null = null;
+  let inflight: Promise<string> | null = null;
+  return async () => {
+    if (ready) return ready;
+    if (!inflight) inflight = Promise.resolve().then(() => provisionHarness(targetDir)).then((d) => (ready = d));
+    return inflight;
+  };
+}