Bump CI to Xcode 26.3 / iOS 26 simulator - #803
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Adopts the `.xcode-version` pattern used by sibling Automattic iOS repos (wpios, wcios, Automattic-Tracks-iOS): the pin lives in `.xcode-version` and `IMAGE_ID` is derived from it in `.buildkite/shared-pipeline-vars`, so future bumps touch a single file. iPhone SE (3rd generation) is not bundled with Xcode 26, so the fastlane simulator device moves to iPhone 17 on iOS 26.3. The `.github/workflows/docc.yml` workflow is switched from `Xcode_16.2.app` to `Xcode_26.3.app` for consistency. Snapshot regeneration lands in a follow-up commit. --- Generated with the help of Claude Code, https://claude.ai/code Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Closed in favor of #825
Description
Moves the repo's CI tooling off Xcode 16.2 / iOS 18.2 / iPhone SE (3rd generation) onto Xcode 26.3 / iOS 26.3 / iPhone 17.
.xcode-version(26.3) and rewrites.buildkite/shared-pipeline-varsto deriveIMAGE_IDfrom it — same pattern used in wpios, wcios, and Automattic-Tracks-iOS, so future Xcode bumps touch a single file.fastlane/Fastfile: iPhone SE (3rd generation) is not bundled with Xcode 26, so the simulator moves toiPhone 17 (26.3)..github/workflows/docc.yml:/Applications/Xcode_16.2.app→/Applications/Xcode_26.3.app.Tests/GravatarUITests/__Snapshots__/*.png— SwiftUI rendering shifted between iOS 18 and iOS 26, and the device changed, so every reference image had to be recaptured.CI_TOOLKITstays pinned at3.9.1to keep this PR narrowly scoped; a separate bump to a6.xline (as in sibling repos) is left as a follow-up.Testing Steps
Build and Test Swift Package,SwiftLint,SwiftFormat,Validate Podspecs, andBuild Demoshould all pass on the newxcode-26.3image.Deploy Gravatar DocCworkflow still publishes docs on merge totrunk.Notes for reviewers
withSnapshotTesting(record: .failed)across two passes onXcode 26.3 (17C529)with theiOS 26.3simulator runtime; the final full-suite run landed with 198 test cases / 55 suites passing, 0 failures.testLoadingStateinAboutEditorViewTestsrelies onTask.sleep(nanoseconds: 20)to catch a mid-load snapshot and is somewhat timing-sensitive — worth keeping an eye on over the next few builds, but this flakiness is pre-existing rather than something introduced here.