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"""Startup work before running the web server."""
import os
import shutil
from typing import TypedDict
import yaml
from huggingface_hub import scan_cache_dir, snapshot_download
from lilac.concepts.db_concept import CONCEPTS_DIR, DiskConceptDB, get_concept_output_dir
from lilac.env import data_path, env
from lilac.utils import get_datasets_dir, get_lilac_cache_dir, log
def delete_old_files() -> None:
"""Delete old files from the cache."""
# Scan cache
try:
scan = scan_cache_dir()
except BaseException:
# Cache was not found.
return
# Select revisions to delete
to_delete = []
for repo in scan.repos:
latest_revision = max(repo.revisions, key=lambda x: x.last_modified)
to_delete.extend(
[revision.commit_hash for revision in repo.revisions if revision != latest_revision])
strategy = scan.delete_revisions(*to_delete)
# Delete them
log(f'Will delete {len(to_delete)} old revisions and save {strategy.expected_freed_size_str}')
strategy.execute()
class HfSpaceConfig(TypedDict):
"""The huggingface space config, defined in README.md.
See:
https://huggingface.co/docs/hub/spaces-config-reference
"""
title: str
datasets: list[str]
def main() -> None:
"""Download dataset files from the HF space that was uploaded before building the image."""
# SPACE_ID is the HuggingFace Space ID environment variable that is automatically set by HF.
repo_id = env('SPACE_ID', None)
if not repo_id:
return
delete_old_files()
with open(os.path.abspath('README.md')) as f:
# Strip the '---' for the huggingface readme config.
readme = f.read().strip().strip('---')
hf_config: HfSpaceConfig = yaml.safe_load(readme)
# Download the huggingface space data. This includes code and datasets, so we move the datasets
# alone to the data directory.
for lilac_hf_dataset in hf_config['datasets']:
print('Downloading dataset from HuggingFace: ', lilac_hf_dataset)
snapshot_download(
repo_id=lilac_hf_dataset,
repo_type='dataset',
token=env('HF_ACCESS_TOKEN'),
local_dir=get_datasets_dir(data_path()),
ignore_patterns=['.gitattributes', 'README.md'])
snapshot_dir = snapshot_download(repo_id=repo_id, repo_type='space', token=env('HF_ACCESS_TOKEN'))
# Copy datasets.
spaces_data_dir = os.path.join(snapshot_dir, 'data')
# Delete cache files from persistent storage.
cache_dir = get_lilac_cache_dir(data_path())
if os.path.exists(cache_dir):
shutil.rmtree(cache_dir)
# NOTE: This is temporary during the move of concepts into the pip package. Once all the demos
# have been updated, this block can be deleted.
old_lilac_concepts_data_dir = os.path.join(data_path(), CONCEPTS_DIR, 'lilac')
if os.path.exists(old_lilac_concepts_data_dir):
shutil.rmtree(old_lilac_concepts_data_dir)
# Copy cache files from the space if they exist.
spaces_cache_dir = get_lilac_cache_dir(spaces_data_dir)
if os.path.exists(spaces_cache_dir):
shutil.copytree(spaces_cache_dir, cache_dir)
# Copy concepts.
concepts = DiskConceptDB(spaces_data_dir).list()
for concept in concepts:
# Ignore lilac concepts, they're already part of the source code.
if concept.namespace == 'lilac':
continue
spaces_concept_output_dir = get_concept_output_dir(spaces_data_dir, concept.namespace,
concept.name)
persistent_output_dir = get_concept_output_dir(data_path(), concept.namespace, concept.name)
shutil.rmtree(persistent_output_dir, ignore_errors=True)
shutil.copytree(spaces_concept_output_dir, persistent_output_dir, dirs_exist_ok=True)
shutil.rmtree(spaces_concept_output_dir, ignore_errors=True)
if __name__ == '__main__':
main()
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