prepare_source_tree.py

#!/usr/bin/env python3

import argparse
import json
from pathlib import Path
import sys


sys.dont_write_bytecode = True
from validate_dataset import validate


def prepare(root):
    result = validate(root)
    missing = result["missing_empty_directories"]
    for name in missing:
        directory = root / name
        if directory.is_symlink() or directory.exists():
            raise ValueError("Directory changed after validation: " + name)


        directory.mkdir()
    after = validate(root)
    if after["missing_empty_directories"]:
        raise ValueError("Source tree still has missing declared empty directories")
    return {"status": "pass", "created_empty_directories": missing,
            "missing_empty_directories": [], "network_actions_performed": False}


def main():
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("--root", type=Path, default=Path(__file__).resolve().parent)
    args = parser.parse_args()
    try:
        result = prepare(args.root.resolve())
    except (ValueError, KeyError, IndexError, TypeError, OSError) as error:
        print(json.dumps({"status": "fail", "error": str(error)}, ensure_ascii=False), file=sys.stderr)
        return 1
    print(json.dumps(result, ensure_ascii=False, indent=2))
    return 0


if __name__ == "__main__":
    raise SystemExit(main())