mesh-lab/test/rebuild.test.ts

import { test } from "node:test";
import assert from "node:assert/strict";
import { planned, controlPlaneImage } from "../src/rebuild.ts";
import { repositories } from "../src/repos.ts";
import { loadScenario } from "../src/declaration/parse.ts";

// The control plane's image and the builder are one step, not two.
//
// Both parse manifests. On 2026-08-30 a rename was built into the image and not the binary, and
// the run that found out was a full lab raise. novox/hq 04-ISSUES/005.
test("the control plane's image and builder are always built together", () => {
  const builds = planned({
    MESH_LAB_MODULES: "/repo/control/examples/modules",
    MESH_LAB_BUILDER: "/repo/control/build/mesh-builder",
  });
  const what = builds.map((b) => b.what);
  assert.ok(what.includes("images"), "the images were not built");
  assert.ok(what.includes("builder"), "the builder was not built");
  for (const build of builds) assert.equal(build.in, "/repo/control");
});

// Every image the lab runs, not only the control plane's.
//
// On 2026-09-01 a run had a control-plane image built that minute and a provisioner image built
// the day before. A test against a real database failed, and it looked exactly like the change
// under test being wrong: the provisioner was creating logins by a naming rule that had been
// replaced hours earlier. novox/hq 04-ISSUES/005 again, one target along.
//
// Named individually rather than by counting, because the failure this guards is a target that
// exists and is not run — which a count would not notice.
test("every image the lab runs is rebuilt, not only the control plane's", () => {
  const builds = planned({ MESH_LAB_MODULES: "/repo/control/examples/modules" });
  const images = builds.find((b) => b.what === "images");
  assert.ok(images, "no image build at all");
  for (const target of [
    "image", "builder-image", "provisioner-image", "objectstore-image",
    "redis-provisioner-image", "proxy-image",
  ]) {
    assert.ok(images.argv.includes(target), `${target} is never built, so the lab runs a stale one`);
  }
});

// The installer is built, and it is built AFTER the image it carries.
//
// `make bootstrap` embeds the output of `docker save <image>`, so an installer built before the
// control plane's image is one carrying whatever was lying around — 04-ISSUES/005 again, this time
// sealed inside a binary where nothing would ever notice. The bed raises its anchor by running this
// program (novox/hq ADR 0067), so a stale one is a bed proving something about last week.
test("the installer is built, carrying the image built in the same run", () => {
  const builds = planned({
    MESH_LAB_HOST_BINARY: "/repo/host/mesh-host",
    MESH_LAB_MODULES: "/repo/control/examples/modules",
    MESH_LAB_BOOTSTRAP_BINARY: "/repo/host/mesh-bootstrap",
  });
  const what = builds.map((b) => b.what);
  assert.ok(what.includes("installer"), "the installer is never built, so the bed carries a stale one");
  assert.ok(
    what.indexOf("images") < what.indexOf("installer"),
    `the installer is built before the image it embeds: ${what.join(", ")}`,
  );

  const installer = builds.find((b) => b.what === "installer")!;
  assert.equal(installer.in, "/repo/host");
  assert.ok(installer.argv.includes(`IMAGE=${controlPlaneImage({})}`), installer.argv.join(" "));
  assert.ok(installer.argv.includes("BOOTSTRAP_OUT=/repo/host/mesh-bootstrap"), installer.argv.join(" "));
});

// The anchor must NOT be handed the control plane's image.
//
// The installer carries it, which is the whole reason a machine that can reach no registry can
// raise a mesh (novox/hq ADR 0067). Hand it over from the workstation as well and the installer's
// load says "already held", the carrying is never exercised, and the bed goes green on a fiction —
// the same class of thing the lab's own registry used to hide. Asserted on the file rather than
// remembered, because a list of images is exactly the kind of thing somebody tops up.
test("the whole-mesh bed hands its anchor no control-plane image", () => {
  const scenario = loadScenario("scenarios/whole-mesh-full.yml");
  const named = [
    ...(scenario.images ?? []),
    ...Object.values(scenario.machines).flatMap((m) => m.images ?? []),
  ];
  assert.deepEqual(
    named.filter((i) => i.startsWith("mesh-control")),
    [],
    "the anchor is handed mesh-control, so genesis would never find out whether the installer " +
      "really carries it",
  );
});

// A repository this run was not pointed at is not built, and not claimed.
test("only what this run was pointed at is built", () => {
  assert.deepEqual(planned({}), []);
  const hostOnly = planned({ MESH_LAB_HOST_BINARY: "/repo/host/mesh-host" });
  assert.deepEqual(hostOnly.map((b) => b.what), ["host"]);
  assert.equal(hostOnly[0]!.in, "/repo/host");
});

// What the receipt claims and what the run built come from one derivation.
//
// They are separate concerns that must agree: a receipt naming a repository the run did not build
// is false coverage arriving by nobody's decision — just two derivations drifting apart.
// novox/hq 04-ISSUES/005.
test("every repository the receipt claims was built by the run", () => {
  const env = {
    MESH_LAB_HOST_BINARY: "/repo/host/mesh-host",
    MESH_LAB_MODULES: "/repo/control/examples/modules",
    MESH_LAB_BUILDER: "/repo/control/build/mesh-builder",
  };
  const built = new Set(planned(env).map((b) => b.in));
  for (const [name, directory] of Object.entries(repositories(env))) {
    // mesh-lab is the exception, and it is not an omission: it is TypeScript run from source, so
    // the code under test *is* the code running. There is nothing to build and nothing to go stale.
    if (name === "mesh-lab") continue;
    assert.ok(built.has(directory), `${name} (${directory}) is claimed but never built`);
  }
});