[krozniata]

Summary

Speeds up iOS CI by adding Xcode's compilation cache for Swift, next to the existing ccache for C/ObjC/C++.

• The Swift cache is stored in .xcode-cas, keyed on the Xcode build and Podfile.lock.
• ccache and the Swift cache are now saved right after the build, so a failing e2e test no longer throws away fresh cache entries.

Test Plan

What's required for testing (prerequisites)?

What are the steps to reproduce (after prerequisites)?

Compatibility

OS	Implemented
iOS	✅❌
Android	✅❌

Checklist

• I have tested this on a device and a simulator
• I added the documentation in README.md
• I updated the typed files (TS and Flow)

[Copilot]

🟡 Changes recommended

The Swift cache may be skipped without Swift explicit modules, and the unbounded CAS can grow beyond practical CI cache limits.

1 open issue

• Enable Swift explicit modules for compile cache · New

What changed in this PR

This pull request adds Xcode’s Swift compilation cache to the iOS CI workflow alongside the existing ccache setup, preserving cache entries immediately after the build.

Changes:

• Restores and saves .xcode-cas using Xcode and Podfile.lock cache keys.
• Enables Swift compilation caching for iOS builds.
• Saves compiler caches before e2e tests and reuses the resolved Xcode version for related cache keys.

File	Summary
.github/​workflows/​ios.yml	Adds Xcode CAS caching and post-build persistence, but requires enabling Swift explicit modules and bounding or pruning the CAS before saving.

_{Review effort: Lite}

[github-actions]

🟢 e2e: 21 passed

All 21 tests in 12 files

	Test	Time
🟢	tests/basic-pager.e2e.ts · 3 passed	2m 39s
🟢	basic pager › in LTR › pages horizontally	46.8s
🟢	basic pager › in LTR › pages vertically	51.7s
🟢	basic pager › in RTL › pages horizontally with the reversed gesture	60.0s
🟢	tests/issues/issue-1050-back-gesture.e2e.ts · 8 passed	3m 6s
🟢	back gesture over the pager › in LTR › a back swipe on the first page pops the screen	14.0s
🟢	back gesture over the pager › in LTR › a back swipe on a later page goes to the previous page	14.5s
🟢	back gesture over the pager › in LTR › a forward swipe on the first page still goes to the next page	11.6s
🟢	back gesture over the pager › in RTL › a back swipe on the first page pops the screen	39.0s
🟢	back gesture over the pager › in RTL › a back swipe on a later page goes to the previous page	40.9s
🟢	back gesture over the pager › in RTL › a forward swipe on the first page still goes to the next page	35.2s
🟢	back gesture over a pager in a nested stack › a back swipe on the first page pops the outer stack	16.9s
🟢	back gesture over a pager in a nested stack › a forward swipe on the first page still goes to the next page	13.8s
🟢	tests/issues/issue-1083-modal-set-page.e2e.ts · 1 passed	16.9s
🟢	setPage called behind a native-stack modal lands on the requested page	16.9s
🟢	tests/issues/issue-1096-keyboard-shrink.e2e.ts · 1 passed	25.3s
🟢	keyboard avoidance does not shrink the page under the keyboard	25.3s
🟢	tests/issues/issue-1098-nested-pager.e2e.ts · 1 passed	18.7s
🟢	outer pager stays responsive after its page count changes around a nested pager	18.7s
🟢	tests/issues/issue-1142-search-bar-inset.e2e.ts · 1 passed	23.4s
🟢	FlatList inside the pager gets the search bar safe-area insets	23.4s
🟢	tests/material-top-bar.e2e.ts · 1 passed	23.2s
🟢	material top tabs survive a native-stack push and pop	23.2s
🟢	tests/nested-pager-view.e2e.ts · 1 passed	22.4s
🟢	nested horizontal and vertical pagers scroll independently	22.4s
🟢	tests/on-page-selected.e2e.ts · 1 passed	23.0s
🟢	onPageSelected fires an alert for every page change	23.0s
🟢	tests/scrollable-pager-view.e2e.ts · 1 passed	30.5s
🟢	pager inside a ScrollView keeps its page across vertical scrolls	30.5s
🟢	tests/smoke.e2e.ts · 1 passed	14.4s
🟢	horizontal pager pages with the panel buttons	14.4s
🟢	tests/tab-view-inside-scroll-view.e2e.ts · 1 passed	24.4s
🟢	TabView inside a ScrollView swipes tabs and scrolls the page	24.4s

_{e2e 0.21.0 · 9m 33s · ios · run artifacts}