fix: one window per archive, and no save once the file changed (#256) - #264
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sarensw merged 2 commits intoSep 21, 2026
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Opening an archive from the start page, or by dropping it on an empty window, loaded it a second time when another window already had it open. ArchiveState.openDropped, where both paths meet, now asks the window manager to bring that window forward instead. A save names the entries it removes by their position in the file as it was opened. Once anything else has written to the file, those positions hold other entries, and Save or Save As changed the wrong ones without a word. The window now records the file's modification date and size when it opens it, and ArchiveSaver refuses to write when they no longer match, saying to close the window and open the archive again.
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Included review availability: Your plan provides up to 4 included reviews per hour; 1 remains after this review. 📝 WalkthroughWalkthroughThe change prevents duplicate archive windows by focusing an existing window. It records the source file state when an archive opens and refuses saves after external changes. ChangesArchive safety
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Bug fix · Severity of issue fixed: Medium Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 68.42% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 19 functions across 7 files. (1 skipped: 1 unsupported.)
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Inline comments:
In `@Modules/Sources/Core/ArchiveSaver.swift`:
- Line 83: Move or repeat the source freshness validation immediately before the
SevenZipArchive.writeArchive call, after folder-access and password-resolution
awaits; bind that validation to the actual write using a conditional commit or
coordinated writer lock so the archive cannot be replaced between validation and
writing. Update the flow around writeWithFolderAccess and preserve the existing
stale-source handling.
- Around line 223-224: Update ArchiveState and the Save/Save As flows in
ArchiveSaver to capture content-based stamps for every archive volume, including
split-archive siblings, before loading or saving. Compare all stored volume
stamps before either operation and refuse the operation when any source volume
has changed, including same-size date-preserving rewrites; add regression
coverage for both this case and modified split volumes.
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MacPacker/Features/ArchiveWindow/ArchiveWindowManager.swiftMacPacker/Features/Home/HomeView.swiftMacPackerUITests/MacPackerUITests.swiftModules/Sources/Core/ArchiveSaver.swiftModules/Sources/Core/ArchiveState.swiftModules/Tests/CoreTests/ArchiveStateTests.swiftModules/Tests/CoreTests/ZipWriteTests.swift
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One window per archive now holds for every way of opening one, and a save no longer writes into a file that changed since the window read it.
Why
Two paths opened an archive in the window they were in, without asking whether another window had it: the start page (Recent, Open Archive…) and a drop on an empty window. Both go through
ArchiveState.openDropped, which never checked.With the same archive in two windows, the second save went wrong. A pending removal names its entry by position in the file as it was opened (
remove(sourceIndex:)). After the first window saved, other entries sat at those positions, and the second save removed them instead — silently. A Save As reads the source by the same positions, so it wrote the same wrong result to a new file. Another app changing the archive, or a Save As over it from another window, did the same.What changed
openDropped(url:)asksfocusWindowHoldingfirst. The window manager wires it to the split-aware lookupshowWindow(for:)already used, nowfocusWindow(holding:). The other window comes forward; the empty one stays as it is.open(url:)records the file's modification date and size (FileStamp) before the load reads it.ArchiveSaver.save()compares that with the file on disk before any write, Save and Save As alike, and refuses when they differ. The pending changes stay, and the alert says: "x.zip was changed by another window or app after it was opened, so your changes can't be saved. Close the window and open the archive again." — close first, because opening it again now brings this same window forward.Modification date and size is rsync's quick check. A write that keeps both slips through; the comment on
FileStampnames hashing as the upgrade if that ever matters.Test
aSaveIsRefusedOnceTheFileChangedSinceItWasOpenedinZipStateEditTests, three cases: another window saves, a Save As in another window writes over the file, another app runszip -d. All three fail onmain: the stale save writes over the change and removes other entries than the ones marked. The test saves twice first, so a window's own saves are shown not to be refused.anArchiveOpenInAnotherWindowBringsThatWindowForwardinArchiveStateMultipleOpenTestsfails onmain: the empty window loads the archive a second time.zip -d, Save and Save As are refused with the alert; two saves in a row go through.testHomeScreenOpensArchiveFromRecentsclicked the recent of the archive that was still open — the double open itself. It now expects the first window to come forward (⌘W then leaves the home screen) and a second click to open in place. Built withbuild-for-testing, not run: it needs Touch ID.The test archive is
makeSystemZipFixture, as in the other state-level edit tests: no archive quirk is involved, any zip reproduces it.Changelog
Editing shipped in 0.18.0 and the start page in 0.19.0, so this reached users. One
fixitem for #256 in the 1.0.0 block:An archive can be opened twice. The 14 translations are machine-made — worth a look.Not in scope
Closes #256.
Summary by CodeRabbit
New Features
Bug Fixes