// --- T-I8 one-shot (row 190): the default instance's renders and outputs from the base da230ca48
// scripts and templates and from the candidate, in one fixture. Not committed; BUILD.md records it.
const BASE_SHA='da230ca48';
const repoBase=join(base,'repo-base');
cpSync(repo,repoBase,{recursive:true});
const changed=['packages/cli/systemd/mosaic-bus.service.in','packages/conversation/src/guard.mjs','packages/discord/systemd/mosaic-discord@.service.in','packages/webui/systemd/mosaic-webui.service.in','scripts/bootstrap.sh','scripts/bus-service.sh','scripts/discord-service.sh','scripts/mosaic-config.mjs','scripts/stack-copy.sh','scripts/stack-release.sh','scripts/webui-service.sh'];
for(const f of changed)writeFileSync(join(repoBase,f),execFileSync('git',['-C',ROOT,'show',`${BASE_SHA}:${f}`]));
rmSync(join(repoBase,'scripts','instance.sh'));
for(const f of changed)assert.notEqual(sha(join(repoBase,f)),sha(join(repo,f)),f);
const SR_BASE=join(repoBase,'scripts','stack-release.sh');
const both=async(e,...args)=>{const c=await run({...e,sr:SR},...args),b=await run({...e,sr:SR_BASE},...args);return [c,b]};
const sh2=(r,e,name,...a)=>spawnSync('bash',[join(r,'scripts',name),...a],{env:e.env,encoding:'utf8'});
const OUT=process.env.TI8_OUT;
const record=(label,c,b)=>appendFileSync(OUT,`== ${label}\ncandidate code ${c.code??c.status} sha ${createHash('sha256').update(c.out??c.stdout).digest('hex')} err ${createHash('sha256').update(c.err??c.stderr).digest('hex')}\nbase      code ${b.code??b.status} sha ${createHash('sha256').update(b.out??b.stdout).digest('hex')} err ${createHash('sha256').update(b.err??b.stderr).digest('hex')}\n`);
// The one path that differs by design: each script names its own repository (--checkout, REPO).
const norm=(r)=>({code:r.code??r.status,out:(r.out??r.stdout).replaceAll(repoBase,repo),err:(r.err??r.stderr).replaceAll(repoBase,repo)});
const same=(label,c0,b0)=>{const c=norm(c0),b=norm(b0);record(label,c,b);assert.equal(c.code??c.status,b.code??b.status,label);assert.equal(c.out??c.stdout,b.out??b.stdout,label);assert.equal(c.err??c.stderr,b.err??b.stderr,label)};

test('T-I8 one-shot: the default instance prints and renders the same from the base and the candidate',async(t)=>{
 const e=await mk(t);await seed(e);
 for(const [name,args] of [
  ['bus-service.sh',['render','--copy',B,'--copies',COPIES,'--claude',e.claude]],
  ['bus-service.sh',['render','--copy',B,'--copies',COPIES,'--pm','--claude',e.claude]],
  ['webui-service.sh',['render','--copy',B,'--copies',COPIES,'--port',e.port,'--business','acme']],
  ['webui-service.sh',['render','--copy',B,'--copies',COPIES,'--port',e.port,'--business','acme','--tester-port','7341']],
  ['discord-service.sh',['render']],
  ['stack-copy.sh',['check','--copies',COPIES,'--bin',e.bin]],
  ['stack-copy.sh',['check','--copies',COPIES,'--bin',e.bin,'--business','acme']],
 ]){
  const c=sh2(repo,e,name,...args),b=sh2(repoBase,e,name,...args);
  assert.equal(c.status,0,`${name} ${args.join(' ')}: ${c.stderr}`);
  same(`${name} ${args.join(' ')}`,c,b);
 }
 for(const args of [['status','acme'],['activate',C1,'acme','--plan'],['activate',C1,'acme','--tester-port','7341','--plan'],['activate',C,'acme','--migrate','--plan'],['activate',B,'acme','--plan'],['rollback','acme','--plan']]){
  const [c,b]=await both(e,...args);same(args.join(' '),c,b);
 }
 assert.equal((await run(e,'activate',C1,'acme')).code,0);
 for(const args of [['status','acme'],['rollback','acme','--plan']]){const [c,b]=await both(e,...args);same(`after activate C1: ${args.join(' ')}`,c,b)}
});