1import { execSync } from 'child_process'
2import { cliFlag } from '../../serverF/cliArgAI.mts'
3
4export const isWithNix = () => cliFlag('--withNix')
5
6export const guardNixInstalled = () => {
7  try {
8    execSync('which nix', {stdio: 'ignore'})
9  } catch {
10    console.error([
11      'nix not found. Install with:',
12      '',
13      '  sh <(curl -L https://nixos.org/nix/install) --daemon',
14      '',
15      'Then restart your shell and re-run with --withNix.',
16      'Docs: https://nixos.org/download',
17    ].join('\n'))
18    process.exit(1)
19  }
20  try {
21    // nix store info hangs with ssh-ng://, so test with a trivial build dispatch instead
22    execSync(`nix build --impure --expr '(import <nixpkgs> { system = "x86_64-linux"; }).hello' --no-link 2>&1`, {timeout: 60000, stdio: 'ignore'})
23  } catch {
24    console.error([
25      'nix remote builder not reachable or not configured.',
26      '',
27      'Deploy the builder:  ptnode pt0/klustersF/do2demo/epSyncNixbuilder.mjs apply',
28      'Then configure:      ptnode pt0/klustersF/do2demo/epSyncNixbuilder.mjs setup',
29      'Host key changed?    ptnode pt0/klustersF/do2demo/epSyncNixbuilder.mjs fixssh',
30    ].join('\n'))
31    process.exit(1)
32  }
33}
34