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import { cpSync, existsSync, mkdirSync, rmSync } from "node:fs";import { dirname, join } from "node:path";import { createRequire } from "node:module"; const root = process.cwd();const out = join(root, ".selfhost-runtime");const serverOut = join(out, "apps/host-selfhost/dist-server");const requireFromSelfHost = createRequire(join(root, "apps/host-selfhost/package.json")); // libSQL ships its native addon as per-platform optional dependencies// (`@libsql/<os>-<arch>-<abi>`), and Bun installs only the one matching the// build platform. The self-host image is built for both linux/amd64 and// linux/arm64, so a hardcoded `@libsql/linux-x64-gnu` throws on the arm64 leg// (that package isn't installed there). Derive it from the current build// platform instead. Under buildx/QEMU `process.platform`/`process.arch` are the// emulated target's values; for local runs they are the host's. The build base// (oven/bun:1) and runtime (distroless cc-debian12) are both glibc, so linux// uses the `-gnu` binding; revisit if an Alpine/musl base is ever introduced.const libsqlNativePackage = (): string => {  const platformMap: Record<string, string> = {    "darwin-arm64": "darwin-arm64",    "darwin-x64": "darwin-x64",    "linux-arm64": "linux-arm64-gnu",    "linux-x64": "linux-x64-gnu",    "win32-x64": "win32-x64-msvc",  };  const key = `${process.platform}-${process.arch}`;  const target = platformMap[key];  if (!target) {    throw new Error(      `package-runtime: no @libsql native package mapped for ${key}. ` +        "Add it to the platform map in apps/host-selfhost/scripts/package-runtime.ts.",    );  }  return `@libsql/${target}`;}; const externalPackages = [  "quickjs-emscripten",  "quickjs-emscripten-core",  "@jitl/quickjs-ffi-types",  "@jitl/quickjs-wasmfile-release-sync",  "@jitl/quickjs-wasmfile-debug-sync",  "@jitl/quickjs-wasmfile-release-asyncify",  "@jitl/quickjs-wasmfile-debug-asyncify",  libsqlNativePackage(),] as const; const quickJsExternals = externalPackages.filter(  (name) => name === "quickjs-emscripten" || name.startsWith("@jitl/"),); const packageDir = (name: string): string => {  const packageJson = requireFromSelfHost.resolve(`${name}/package.json`, {    paths: [join(root, "node_modules/.bun/node_modules")],  });  return dirname(packageJson);}; const copyPackage = (name: string): void => {  const destination = join(out, "node_modules", name);  mkdirSync(dirname(destination), { recursive: true });  cpSync(packageDir(name), destination, { recursive: true, dereference: true });}; rmSync(out, { recursive: true, force: true });mkdirSync(serverOut, { recursive: true }); await Bun.$`bun build apps/host-selfhost/src/serve.ts --target=bun --format=esm --outdir=${serverOut} ${quickJsExternals.map((name) => `--external=${name}`)}`; for (const name of externalPackages) copyPackage(name); if (!existsSync(join(serverOut, "serve.js"))) {  throw new Error(    "Expected bundled self-host server at .selfhost-runtime/apps/host-selfhost/dist-server/serve.js",  );} console.log(`Packaged self-host runtime into ${out}`);