Function runDetect

test/gbrain-detect-shape.test.ts:41–51

* Run detect with a controlled HOME + PATH so the output is deterministic. * We invoke via `bun run ` instead of the shebang so the test doesn't * need bun on its PATH. The script's child-process probes still respect * the controlled PATH.

(env: Partial<NodeJS.ProcessEnv>)

 * the controlled PATH.
 */
function runDetect(env: Partial<NodeJS.ProcessEnv>): string {
  return execFileSync(BUN_BIN, ["run", DETECT_BIN], {
    encoding: "utf-8",
    timeout: 15_000,
    stdio: ["ignore", "pipe", "pipe"],
    // GBRAIN_HOME pinned empty: detect honors it (codex D11), and sibling
    // test files in the same shard set it ambiently — without the pin, the
    // spawned detect reads the polluter's (or the developer's real) config.
    env: { ...process.env, GBRAIN_HOME: "", ...env },
  });
}

/** Run detect with --is-ok and return its exit code (never throws). */
function runIsOk(env: Partial<NodeJS.ProcessEnv>): number {