mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-11-02 07:43:42 +08:00
Chris Tate
9abf35f6a2
The native compiler ran four large module initializers at every startup: the builtin call signatures (LIB_FN_SIGS), the Node 24 fetch compatibility profile, and the builtin module function and ambient surface tables. Together their init functions are about 1.3 MB of code, and --version and warm cache-hit builds paged them in and built the tables without reading them. Each table is now built by a function on its first call and kept in a module variable: - libFnSignatures() replaces LIB_FN_SIGS - node24FetchCompatProfile() and staticFetchMembers() replace NODE24_FETCH_COMPAT_PROFILE and the STATIC_* member sets - builtinModuleFns() and ambientSurfaceFns() replace BUILTIN_MODULE_FNS and AMBIENT_SURFACE_FNS The @scriptc/compiler entry point keeps LIB_FN_SIGS and NODE24_FETCH_COMPAT_PROFILE as deprecated constants built from the new functions when the entry module loads. The native compiler does not load that module. The surface manifest's coverage notes read the fetch target through the profile function, so building the manifest module no longer builds the profile. The table contents are unchanged.
60 lines
2.5 KiB
TypeScript
60 lines
2.5 KiB
TypeScript
/* Every Node pin names the same release: .node-version (the
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* differential oracle), Dockerfile.sandbox, the compatibility pin, the fetch
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* profile, the docs matrix fallback, and the version the compiled binary
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* reports. */
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import { readFileSync } from "node:fs";
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import { join } from "node:path";
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import { expect, test } from "vitest";
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import { node24FetchCompatProfile } from "../src/compat/fetch-profile.js";
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import { NODE_COMPAT_VERSION } from "../src/frontend/lowering/builtins/process.js";
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import { CRYPTO_CONSTANTS } from "../src/frontend/lowering/crypto-tables.js";
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import { ZLIB_CONSTANTS } from "../src/frontend/lowering/zlib-constants.js";
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const repoRoot = join(import.meta.dirname, "../../..");
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const read = (path: string): string => readFileSync(join(repoRoot, path), "utf8");
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test("the Node pins agree", () => {
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const pinned = read(".node-version").trim();
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const compat = JSON.parse(read("internal/compatibility/node-v24.json")) as {
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version: string;
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tag: string;
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};
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expect(compat.version).toBe(pinned);
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expect(compat.tag).toBe(`v${pinned}`);
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expect(read("Dockerfile.sandbox")).toMatch(new RegExp(`^ARG NODE_VERSION=${pinned}$`, "m"));
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expect(NODE_COMPAT_VERSION).toBe(pinned);
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expect(node24FetchCompatProfile().target.node).toBe(pinned);
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expect(read("packages/runtime/src/scr_lib.c")).toContain(
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`#define SCR_NODE_COMPAT_VERSION "${pinned}"`,
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);
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expect(read("docs/src/components/node-compatibility-matrix.tsx")).toContain(
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`snapshot?.nodeVersion ?? "${pinned}"`,
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);
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});
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test("the crypto.constants declaration matches the baked table", () => {
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const dts = read("packages/compiler/ambient/scriptc-node-fallback.d.ts");
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const start = dts.indexOf("export interface CryptoConstants {");
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const body = dts.slice(start, dts.indexOf("\n }\n", start));
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const declared = Object.fromEntries(
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[...body.matchAll(/readonly (\w+): (-?\d+|"[^"]*");/g)].map(([, name, value]) => [
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name!,
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JSON.parse(value!) as number | string,
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]),
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);
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expect(declared).toEqual(CRYPTO_CONSTANTS);
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});
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test("the zlib.constants declaration matches the baked table", () => {
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const dts = read("packages/compiler/ambient/scriptc-node-fallback.d.ts");
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const start = dts.indexOf("export interface ZlibConstants {");
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const body = dts.slice(start, dts.indexOf("\n }\n", start));
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const declared = Object.fromEntries(
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[...body.matchAll(/readonly (\w+): (-?\d+|number);/g)].map(([, name, value]) => [
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name!,
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value === "number" ? Infinity : Number(value),
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]),
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);
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expect(declared).toEqual(ZLIB_CONSTANTS);
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});
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