Architecture mismatch on macOS self-hosted runner?

セルフホスト型 macOS runner で失敗を再現し、まず macos-run-invoker.js のスタックトレースと xcodebuild における SwiftLint build tool plug-in のステップを確認します。CodeQL、sourcekitdInProc.framework、runner で関係するアーキテクチャを比較し、その後、Xcode targets が Rosetta を必要とせずにビルドできることを検証します。

I'm trying to integrate CodeQL in a private repo, using a self-hosted runner. My first attempt failed with this error:

node:internal/child_process:420
    throw new ErrnoException(err, 'spawn');
    ^

Error: spawn Unknown system error -86
    at ChildProcess.spawn (node:internal/child_process:420:11)
    at spawn (node:child_process:762:9)
    at Object.<anonymous> (/Users/admin/Code/ActionRunner/bin.2.331.0/macos-run-invoker.js:8:14)
    at Module._compile (node:internal/modules/cjs/loader:1521:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1623:10)
    at Module.load (node:internal/modules/cjs/loader:1266:32)
    at Module._load (node:internal/modules/cjs/loader:1091:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:164:12)
    at node:internal/main/run_main_module:28:49 {
  errno: -86,
  code: 'Unknown system error -86',
  syscall: 'spawn'
}

I've managed to work around this by installed Rosetta on the build machine, but that's a temporary workaround, since Rosetta is going away in the next year or two.

I still hit something that I suspect is an architecture mismatch, though. Most of the targets in the Xcode project use the SwiftLint build tool plug-in, and when xcodebuild gets to that step, it fails with this error:

SourceKittenFramework/library_wrapper.swift:58: Fatal error: Loading sourcekitdInProc.framework/Versions/A/sourcekitdInProc failed

My best guess is that sourcekitdInProc is an arm64 binary, while part of CodeQL still uses an x86 binary.

I've also tried running this on GitHub's shared macOS runners, but they are abysmally slow and I'd need to work out an authentication issue with a dependency in a different private repo. It'd be much nicer to get this working on the self-hosted runner.