"""Reproduce the incremental v3 task set from the pinned pre-migration release.
Requires pyarrow and huggingface_hub. Does not rerun evaluation.
"""
import argparse,hashlib,json
from pathlib import Path
import pyarrow as pa,pyarrow.parquet as pq
from huggingface_hub import hf_hub_download

def build(out):
 root=Path(__file__).parent;m=json.loads((root/'metadata/layout.json').read_text())
 p=hf_hub_download('FWeindel/validated-tasks','endless_v3/tasks.parquet',repo_type='dataset',revision=m['previous_cumulative_revision'])
 assert hashlib.sha256(Path(p).read_bytes()).hexdigest()==m['previous_tasks_sha256']
 t=pq.read_table(p);ids=set(m['task_ids']);t=t.filter(pa.array([x in ids for x in t['path'].to_pylist()]));assert set(t['path'].to_pylist())==ids
 meta=dict(t.schema.metadata or {})
 if b'ot.images.v1' in meta:
  im=json.loads(meta[b'ot.images.v1']);im['tasks']={k:v for k,v in im['tasks'].items() if k in ids};used={e['bundle'] for v in im['tasks'].values() for e in v['environments']};im['bundles']={k:v for k,v in im['bundles'].items() if k in used};im['coverage']={'cached_tasks':len(im['tasks']),'total_tasks':len(ids)}
  if 'uncached_task_ids' in im:im['uncached_task_ids']=sorted(ids-set(im['tasks']))
  meta[b'ot.images.v1']=json.dumps(im).encode()
 release=json.loads(meta.get(b'ot.release.v3',b'{}'));release.update({k:m[k] for k in ['layout','kept','baseline_kept','combined_kept','baseline_folder','baseline_revision','carried_from_v2']});meta[b'ot.release.v3']=json.dumps(release).encode()
 pq.write_table(t.replace_schema_metadata(meta),out,compression='zstd')
if __name__=='__main__':
 p=argparse.ArgumentParser();p.add_argument('--out',type=Path,required=True);a=p.parse_args();build(a.out)