feat(web): import themes from local .vsix extension packages - #8419
ipanasenko wants to merge 34 commits into
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A paid or private VS Code theme the user already owns has no import path: the dialog only accepts loose JSON files, and Open VSX only carries open-source extensions. Extract the VSIX/ZIP machinery from openVsxThemes.ts into vsixThemePackage.ts and reuse it for local files. A dropped or picked .vsix imports every contributed color theme as one collection, so re-importing the same extension offers an update instead of piling up copies. Local packages skip the registry-only gates (license allowlist, checksum) but keep every archive-safety limit. The desktop picker lists .vsix and sends package bytes base64-encoded over IPC.
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📝 WalkthroughWalkthroughThe PR adds local VSIX theme package importing. Desktop IPC transfers capped binary contents, shared code validates and parses VSIX archives, and the settings dialog installs or replaces imported collections. Open VSX imports now use the shared package pipeline. ChangesVSIX theme package import
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Suggested reviewers: Sequence Diagram(s)sequenceDiagram
participant User
participant ThemeImportDialog
participant DesktopPicker
participant vsixThemePackage
participant ThemeCollectionStore
User->>ThemeImportDialog: select or drop .vsix file
ThemeImportDialog->>DesktopPicker: request package bytes when using desktop
DesktopPicker-->>ThemeImportDialog: return capped base64 package content
ThemeImportDialog->>vsixThemePackage: importVsixThemeFile(package bytes)
vsixThemePackage-->>ThemeImportDialog: return theme definitions
ThemeImportDialog->>ThemeCollectionStore: add or replace theme collection
ThemeCollectionStore-->>ThemeImportDialog: confirm collection update
Merge Risk: 🔵 Low · up to The updated appearance documentation still needs the required Markdown formatter run before merge. This is a bounded documentation-quality and repository-policy concern. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 20.51% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 39 functions across 8 files. (1 skipped: 1 unsupported.) ✨ Finishing Touches 💡 1🛠️ Fix failing CI checks 💡
🧪 Generate unit tests (beta)
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A .vsix could grow between stat and readFile, pulling an arbitrarily large archive into main-process memory before the renderer rejected it. Read through a bounded loop that stops past the cap instead.
ApprovabilityVerdict: Not approved Macroscope's review found this PR not approvable — This PR adds a substantial No code changes detected at Adjust the Minimum Blocking Severity for this repo — including turning it Off — in Settings. You can add or adjust custom eligibility rules. Learn more. |
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Both desktop theme reads now go through the bounded reader, so a JSON file that grows after stat is capped the same way a package is. The two size caps live in the IPC contract so the desktop picker, the dialog, and the package reader cannot drift. Open VSX and local imports share one collection-id helper. The ZIP safety limits get direct tests, and the appearance guide mentions .vsix import.
…-vsix' into t3code/add-custom-theme-from-vsix
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In `@docs/user/appearance.md`:
- Around line 26-30: Run the required Markdown formatter with `vp check --fix`
for the edited appearance documentation, then include any formatter-generated
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📒 Files selected for processing (8)
apps/desktop/src/ipc/methods/window.test.tsapps/desktop/src/ipc/methods/window.tsapps/web/src/components/settings/ThemeImportDialog.tsxapps/web/src/openVsxThemes.tsapps/web/src/vsixThemePackage.test.tsapps/web/src/vsixThemePackage.tsdocs/user/appearance.mdpackages/contracts/src/ipc.ts
🚧 Files skipped from review as they are similar to previous changes (1)
- apps/desktop/src/ipc/methods/window.test.ts
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…me-from-vsix # Conflicts: # apps/desktop/src/ipc/methods/window.ts
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… dialog The shadcn/no-restyle ceiling gate failed by one finding. The Alert already spaces its title and description, so the override is not needed.
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Note This comment is posted by Julius' dot This adds a new local VSIX import workflow, including package selection and collection updates, without explicit maintainer approval of that direction and scope. The reference in #10830 concerns syntax highlighting and does not approve this import path. The prior approval rule requires that approval for new features. Closing this PR; please discuss support for paid and private theme packages in Ideas, obtain scope approval, and link it when requesting reconsideration. |
2 participants
Problem
A theme the user already owns as a
.vsixfile (paid themes like Dracula Pro, private packages, anything not on Open VSX) has no import path. The Add a theme dialog accepts loose T3 Code / VS Code.jsonfiles, and the search only covers open-source Open VSX extensions.Fix
Screen.Recording.2026-08-27.at.6.46.25.PM.mov
includeresolution, contribution parsing, light/dark pairing) fromopenVsxThemes.tsinto a newvsixThemePackage.tsand rebuild the Open VSX import on top of it, so the two paths cannot drift..vsix. Every contributed color theme imports as one collection, so re-importing the same extension offers an update (with the existing local-edits warning) instead of piling up copies.vsix-theme-) and collection namespace (local-vsix:), so a local import never collides with the same extension installed from Open VSX..vsixand sends package bytes base64-encoded over IPC (PickedThemeFile.contentBase64). Both file kinds are read through one bounded reader, so a file that grows afterstatstill stops at its cap. The two caps live inpackages/contractsand are shared by the picker, the dialog, and the package reader.Surfaces
.vsixper import: a package expands into a collection with its own update prompt, so mixing it into a multi-file JSON batch would need a second conflict flow. Multi-select with a.vsixshows a clear error.docs/user/appearance.mdmentions.vsiximport and update-in-place.Note for review: overlaps textually (not logically) with #8063 — that PR hardens the Open VSX network path, this one relocates the ZIP layer it sits on. Whichever lands second rebases mechanically.
Built with Claude (Fable 5.1) via Claude Code.
Note
Add local
.vsixtheme import support in web and desktopimportVsixThemeFileto parse local.vsixbytes into aThemeDefinitioncollection, enforcing a 20 MiB size limit..vsixselections to the new package reader and prompt for explicit confirmation when updating existing theme collections.contentBase64toPickedThemeFilein ipc.ts to pass binary VSIX data across the desktop IPC bridge.ThemeImportDialog.readThemeFilesnow rejects mixed or multiple-file selections that include a.vsixpackage;readCappedFilereports oversized packages as one byte above the 20 MiB limit if the file grows between stat and read.📊 Macroscope summarized 648c61b. 6 files reviewed, 1 issue evaluated, 1 issue filtered, 0 comments posted
🗂️ Filtered Issues
apps/desktop/src/ipc/methods/window.ts — 0 comments posted, 1 evaluated, 1 filtered
readCappedFileenters the loop whenbyteLength === limitand still callsfile.readAlloc(64 * 1024). Thus an allowed file that grows after the stat (or merely sits exactly at the cap and reaches EOF) causes an additional 64 KiB allocation; if it grew, that over-limit chunk is retained before the function returnsNone. This violates the claimed bounded-read guarantee that no more thanlimitbytes are pulled into memory. Limit the final read tolimit - byteLengthand perform the one-byte over-limit probe separately (or stop once the cap is reached). [ Already posted ]Note
Medium Risk
New binary import and ZIP expansion paths increase attack surface, though capped reads and existing zip inspection mitigate it; collection replace can overwrite locally edited theme variants when users confirm an update.
Overview
Users can import VS Code theme extension packages (
.vsix) from disk in addition to loose.jsonfiles—covering paid or private themes that Open VSX search cannot reach.VSIX parsing is factored into
vsixThemePackage.ts(ZIP safety limits, manifest/theme extraction, light/dark pairing). Open VSX import now calls that shared module so local and registry paths stay aligned. Local imports use separate theme id (vsix-theme-) and collection (local-vsix:) namespaces so they do not collide with Open VSX installs; proprietary packages skip registry license/checksum checks while keeping archive size and zip-bomb guards.Theme import dialog routes
.vsixthroughimportVsixThemeFile, installs variants as one collection viareplaceCustomThemeCollection, and shows an update prompt when that collection is already installed (one package per import; mixed multi-file selection errors). DesktoppickThemeFilesadds.vsixfilters, a 20 MiB capped binary read, and optionalcontentBase64onPickedThemeFilefor IPC.Reviewed by Cursor Bugbot for commit ad18a69. Bugbot is set up for automated code reviews on this repo. Configure here.
Summary by CodeRabbit
New Features
.vsixextension packages..vsixfiles from desktop and browser file pickers.Bug Fixes
Documentation
Tests