[wagcbjr]

What and why

On Windows, a second build beside an earlier IPA stopped at the pack, in two places in turn:

1. AttributeError: module 'os' has no attribute 'pread' in match(): pack_ipa.py compares and copies entries of the earlier IPA with os.pread, which Windows' Python does not have. pread() now uses os.pread where it exists and seek + read otherwise.
2. Then PermissionError: [WinError 5] Access denied: '<ipa>.partial' -> '<ipa>': the earlier IPA was still open when os.replace put the new one in its place (load_index keeps it open for the reused entries), and Windows refuses to replace an open file. It is now closed once every entry is written, before the replace.

The first build only worked because there was no earlier IPA yet.

Checked

• Tests: packing the same folder twice with os.pread removed and an os.replace that refuses an open destination (as on Windows) fails with each error before the change. After it, the pack writes a valid IPA (zipfile.testzip).
• Games run, with title ID and version: Pokémon Legends: Z-A (0100F43008C44000) 2.0.2, split data build on Windows 11. The pack failed with error 1, then with error 2 after the first fix, and packed the 32 MB IPA after both. The IPA installed and ran on an iPhone (A18 Pro, iOS 27.2).
• Not checked: macOS / Linux packs. On those, os.pread exists and the early close changes nothing, but no pack was run there.

Docs

• No docs changed.
• No game files, keys or data extracted from a game in the change or the attachments.

🤖 Generated with Claude Code

https://claude.ai/code/session_01VDGHF5LyEKSqoK23EvYr6W