121 lines
3.8 KiB
Python
121 lines
3.8 KiB
Python
#!/usr/bin/env python3
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"""把远程 bundle 变成本地直读：硬链接进 StreamingAssets/aa + 改写 catalog。
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## 为什么要用 {RuntimePath} 而不是绝对路径
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试过把 catalog 里的条目改成 `E:/bd2/dl/.../xxx.bundle` 这种绝对路径，结果带子目录的
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bundle 报：
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RemoteProviderException : Invalid path in AssetBundleProvider
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原因是 Addressables 的 `AssetBundleResource.GetLoadInfo()`：
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if (!(location?.Data is AssetBundleRequestOptions)) { loadType = None; } // ← 落到这
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else if (ShouldPathUseWebRequest(path)) loadType = Web;
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else if (UseUnityWebRequestForLocalBundles) loadType = Web;
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else loadType = Local;
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...
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default: // LoadType.None
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Complete(null, false, new RemoteProviderException(
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$"Invalid path in AssetBundleProvider: '{path}'."));
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绝对路径这种 location 上挂不到 `AssetBundleRequestOptions`，于是 LoadType.None。
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**客户端自带那 10 个本地 bundle 用的是 `{RuntimePath}\\<包名>`** ——
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那是 Addressables 原生的本地形态，一定挂得上 options。照抄它。
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## 硬链接
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`RuntimePath` 解析成 `StreamingAssets/aa`，所以 bundle 得摆进去。用 NTFS 硬链接
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**零额外空间**（同一份数据两个路径）。包名里带子目录的（798 个）要建同样的子目录。
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## 用法
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python localize_bundles.py <bundle 所在目录> <aa 目录>
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"""
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import hashlib
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import io
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import json
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import os
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import re
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import shutil
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import sys
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BS = chr(92)
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LOCAL_PREFIX = "{UnityEngine.AddressableAssets.Addressables.RuntimePath}" + BS
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def strip_prefix(s):
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"""`{BDNetwork.CdnInfo.Info}\\平台\\{分辨率}\\{版本}\\<包名>` -> `<包名>`"""
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parts = s.replace(BS, "/").split("/")
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return "/".join(parts[4:])
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def main():
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if len(sys.argv) != 3:
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print(__doc__)
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return 1
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src, aa = sys.argv[1], sys.argv[2]
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cat = os.path.join(aa, "catalog.json")
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if not os.path.isfile(cat):
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print("找不到 %s" % cat)
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return 1
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if not os.path.isdir(src):
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print("找不到 bundle 目录 %s" % src)
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return 1
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# ---- 1. 备份 ----
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bak = cat + ".bak-before-localize"
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if not os.path.exists(bak):
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shutil.copy2(cat, bak)
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print("备份 -> %s" % os.path.basename(bak))
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else:
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print("备份已存在，跳过")
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# ---- 2. 硬链接 ----
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linked = skipped = copied = 0
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for dp, _, fn in os.walk(src):
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for f in fn:
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if not f.endswith(".bundle"):
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continue
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s = os.path.join(dp, f)
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d = os.path.join(aa, os.path.relpath(s, src))
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os.makedirs(os.path.dirname(d), exist_ok=True)
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if os.path.exists(d):
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skipped += 1
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continue
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try:
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os.link(s, d)
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linked += 1
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except OSError:
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shutil.copy2(s, d)
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copied += 1
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print("硬链接 新建%d 已存在%d 退回复制%d" % (linked, skipped, copied))
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# ---- 3. 改写 internal id ----
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o = json.load(io.open(cat, encoding="utf-8"))
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ids = o["m_InternalIds"]
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changed = 0
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for i, s in enumerate(ids):
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if not s.startswith("{BDNetwork.CdnInfo.Info}"):
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continue
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name = strip_prefix(s)
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if not name or "{" in name:
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print("解析异常，中止：%r -> %r" % (s, name))
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return 1
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ids[i] = LOCAL_PREFIX + name
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changed += 1
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print("改写 %d 条" % changed)
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# 长度不变，下标引用依然有效
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raw = json.dumps(o, ensure_ascii=False, separators=(",", ":")).encode("utf-8")
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io.open(cat, "wb").write(raw)
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print("写回 %s（%d 字节）" % (os.path.basename(cat), len(raw)))
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print(" md5 = %s" % hashlib.md5(raw).hexdigest())
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return 0
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if __name__ == "__main__":
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sys.exit(main())
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