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learnharness/scripts/build-server.mjs
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/**
* build-server.mjs — curate the Electron shell's server payload.
*
* `next build` (output: "standalone") produces .next/standalone/ with
* server.js + the traced node_modules subset, but leaves two pieces
* outside that the docs require us to copy: public/ and .next/static/.
* This script finishes the job and sanity-checks the result — including
* the exclusion that keeps the repo's real data/ OUT of the bundle
* (see next.config.ts outputFileTracingExcludes).
*/
import * as fs from "node:fs";
import * as path from "node:path";
const ROOT = path.resolve(import.meta.dirname, "..");
const STANDALONE = path.join(ROOT, ".next", "standalone");
const copyTree = (from, to) => {
fs.cpSync(from, to, { recursive: true });
};
const exists = (p) => fs.existsSync(p);
if (!exists(path.join(STANDALONE, "server.js"))) {
console.error("[build-server] .next/standalone/server.js missing — run `next build` first (output: 'standalone').");
process.exit(1);
}
// 1) Static assets: public/ → standalone/public, .next/static → standalone/.next/static
const staticFrom = path.join(ROOT, ".next", "static");
const staticTo = path.join(STANDALONE, ".next", "static");
if (!exists(staticFrom)) {
console.error("[build-server] .next/static missing — the build looks incomplete.");
process.exit(1);
}
copyTree(staticFrom, staticTo);
if (exists(path.join(ROOT, "public"))) {
copyTree(path.join(ROOT, "public"), path.join(STANDALONE, "public"));
}
// 2) Safety: the repo's real data/ must NEVER ride along in the bundle.
const leakedData = path.join(STANDALONE, "data");
if (exists(leakedData)) {
console.error("[build-server] REFUSING: standalone contains a data/ directory — repo session data would ship in the app.");
console.error(" Check outputFileTracingExcludes in next.config.ts.");
process.exit(1);
}
// 3) Sanity: the runtime-read prompt assets must be present (the teacher
// agent reads them from disk at request time).
for (const asset of [
path.join("src", "agent", "system-prompt.md"),
path.join("src", "agent", "prompts", "teacher", "20-teaching.md"),
]) {
if (!exists(path.join(STANDALONE, asset))) {
console.error(`[build-server] prompt asset missing from the trace: ${asset}`);
process.exit(1);
}
}
console.log("[build-server] server payload ready:", STANDALONE);