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Run CI on the Xcode 27 runner image - #853
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The Swift 6.4 toolchain selects the tools-version 6.4 manifests of the Point-Free packages. These manifests depend on swift-issue-reporting 2.x instead of xctest-dynamic-overlay 1.x, so .package.resolved changes with the Xcode major version. Local builds and releases use Xcode 27, and CI used Xcode 26.6. Each side rewrote the lockfile that the other side committed, and CI tested other dependency versions than the release. Move the Mac app and iOS mirror jobs to the xcode-27 image and commit the lockfile that Xcode 27 resolves.
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Problem
.package.resolveddepends on the Swift toolchain version:Package.swiftwithswift-tools-version: 6.4. It depends onswift-issue-reporting2.x.Package@swift-6.x.swiftmanifests for older toolchains still depend onxctest-dynamic-overlay1.x.Local builds and releases use Xcode 27 (Swift 6.4), and CI used
macos-26with Xcode 26.6. Thus eachmake run-appon Xcode 27 rewrote the committed lockfile, and CI testedxctest-dynamic-overlay 1.13.1while the release linkedswift-issue-reporting 2.1.0.Change
test.yml) and the iOS mirror job (mirror-ios.yml) on thexcode-27runner image (Xcode 27.0, 27A266a, the same build as local).swift-issue-reporting 2.1.0replacesxctest-dynamic-overlay 1.13.1. No other pin changes.Notes
xcode-27as a public preview ([macOS] Xcode 27 is now available as a public preview actions/runner-images#14404). No GAmacos-27label exists yet. Move to it when it is available.iPad Pro 11-inch (M5)on iOS 27.0, soscripts/select_ios_simulator.pyfinds a device.mainbuilds without the App and CLI incremental caches. The GhosttyKit cache key does not depend on Xcode and still applies.xcode-27issue with the missing Metal toolchain (Metal Toolchain is missing on xcode-27 actions/runner-images#14548) does not apply: the repository has no.metalsources, and GhosttyKit comes from prebuilt artifacts.Verification
make build-appwith Xcode 27.0: succeeded.swift package resolveforCLIandMirror/Relaywith Swift 6.4: no lockfile change.