fix_embedded_packages.py

#!/usr/bin/env python3
import argparse
import json
import sys
from pathlib import Path
import shutil

def read_package_name(pkg_dir: Path):
    pj = pkg_dir / "package.json"
    if not pj.is_file():
        return None
    try:
        with pj.open(encoding="utf-8") as f:
            data = json.load(f)
        return data.get("name")
    except Exception as e:
        print(f"[WARN] Failed to read {pj}: {e}")
        return None

def main():
    ap = argparse.ArgumentParser(description="Rename embedded package folders to match package.json name.")
    ap.add_argument("--project", required=True, help="Path to Unity project root (the folder containing Packages/)")
    ap.add_argument("--apply", action="store_true", help="Actually rename. If omitted, dry-run.")
    ap.add_argument("--backup-log", default="rename-embedded-packages.log", help="Path to write a mapping log")
    args = ap.parse_args()

    project = Path(args.project).resolve()
    packages = project / "Packages"
    if not packages.is_dir():
        print(f"[ERR] Not found: {packages}")
        sys.exit(1)

    mappings = []
    for child in sorted(packages.iterdir()):
        if not child.is_dir():
            continue
        name = read_package_name(child)
        if not name:
            continue  # not a package
        # すでに一致していればスキップ
        if child.name == name:
            continue

        target = child.parent / name

        # 同じ実体（ケース違いのみ）の可能性に配慮
        same_ignoring_case = child.name.lower() == name.lower()
        collision = target.exists() and target.resolve() != child.resolve()

        if collision:
            print(f"[ERR] Skip: target already exists: {target}")
            continue

        print(f"[{('APPLY' if args.apply else 'DRY')}] {child.name} -> {name}")
        mappings.append((str(child), str(target)))

        if args.apply:
            # ケース違いのみで Mac の大小無視 FS だと直接 rename が失敗するので一時名を挟む
            if same_ignoring_case:
                temp = child.parent / (name + "__tmp__" )
                child.rename(temp)
                temp.rename(target)
            else:
                child.rename(target)

    if mappings:
        with open(args.backup_log, "w", encoding="utf-8") as f:
            for a,b in mappings:
                f.write(f"{a} -> {b}\n")
        print(f"[INFO] Mapping log written: {args.backup_log}")

    if args.apply:
        print("[INFO] Done. Re-open Unity (or trigger reimport).")
    else:
        print("[INFO] Dry-run finished. Re-run with --apply to rename.")

if __name__ == "__main__":
    main()