623 lines
24 KiB
Swift
623 lines
24 KiB
Swift
import Foundation
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import RunnerCore
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import Virtualization
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/// The outcome of one preflight check.
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public struct DoctorCheck: Sendable, Equatable {
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/// How a check turned out.
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public enum Result: Sendable, Equatable {
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/// Requirement satisfied.
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case pass
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/// Requirement not satisfied; the daemon will not work.
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case fail
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/// Not a hard requirement, but worth knowing about.
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case warn
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/// Informational only.
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case info
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}
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/// Short check name, e.g. `virtualization entitlement`.
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public let name: String
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/// Outcome.
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public let result: Result
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/// What was observed.
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public let detail: String
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/// What to do about it, when the outcome is not ``Result/pass``.
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public let remediation: String?
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public init(name: String, result: Result, detail: String, remediation: String? = nil) {
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self.name = name
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self.result = result
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self.detail = detail
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self.remediation = remediation
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}
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/// Whether this check blocks the daemon from working.
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public var isBlocking: Bool { result == .fail }
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}
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extension DoctorCheck.Result {
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/// Lowercase name, for JSON output and log lines.
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public var label: String {
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switch self {
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case .pass: return "pass"
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case .fail: return "fail"
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case .warn: return "warn"
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case .info: return "info"
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}
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}
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/// Single-character marker used by ``Doctor/format(_:)``.
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public var symbol: String {
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switch self {
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case .pass: return "✓"
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case .fail: return "✗"
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case .warn: return "!"
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case .info: return "·"
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}
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}
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}
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/// Preflight checks for a host that is supposed to run macOS guests.
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///
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/// Each of these corresponds to a failure mode that is otherwise diagnosed only
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/// by a confusing runtime error deep inside the boot path, so `doctor` exists to
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/// surface them all at once, before anything is installed.
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public enum Doctor {
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/// Runs every check.
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///
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/// Checks performed:
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///
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/// 1. **Architecture is arm64.** Virtualization cannot run macOS guests on
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/// Intel at all.
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/// 2. **Host macOS ≥ 26.** Required for ASIF disks; the guest-provisioning
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/// automation additionally wants 27.
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/// 3. **`VZVirtualMachine.isSupported`.** The framework's own verdict.
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/// 4. **`com.apple.security.virtualization` entitlement present** on the
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/// running binary, read with `codesign -d --entitlements - <path>`.
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/// Running from `.build/` instead of the signed `.app` is the single most
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/// common setup mistake, and this is what catches it.
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/// 5. **Free disk ≥ `storage.minFreeDiskGB`.** CoW clones grow as guests
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/// write.
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/// 6. **`login.keychain` unlocked**, via `security show-keychain-info
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/// login.keychain`. macOS 15+ refuses to start a VM otherwise — the
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/// reason the daemon must be a LaunchAgent in a logged-in session.
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/// 7. **Gitea reachable and the token has admin scope**, probed with
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/// ``GiteaClient/listRunners()``. A non-admin token fails here rather
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/// than at the first poll.
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/// 8. **Registration token resolvable** from file, inline value, or (if
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/// enabled) the API.
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/// 9. **Runner download URL is live**, via a one-byte ranged `GET` — the
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/// same verb the real download uses, because the presigned redirect
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/// target is signed per method. Catches a version bump that no longer
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/// has a darwin-arm64 asset.
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/// 10. **Local Network privacy note** (informational). On macOS 15+ the
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/// first attempt to reach a guest over the NAT link can be blocked by
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/// the Local Network permission prompt, which a background agent cannot
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/// answer; the operator must approve the app once.
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///
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/// - Parameter config: Validated configuration. Gitea-dependent checks are
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/// skipped with a ``DoctorCheck/Result/warn`` when no admin token is set.
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/// - Returns: Checks in the order above.
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public static func runChecks(config: RunnerConfig) async -> [DoctorCheck] {
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var checks = hostChecks()
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checks.append(checkDiskSpace(config: config))
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checks.append(checkLoginKeychain())
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checks.append(contentsOf: await checkGitea(config: config))
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checks.append(await checkRunnerDownloadURL(config: config))
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checks.append(localNetworkNote())
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return checks
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}
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/// Runs every check, loading configuration from `path` first.
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///
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/// The host checks still run when the configuration is missing or invalid,
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/// which is the state a first-time operator is actually in.
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///
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/// - Parameter configPath: Path to the configuration file; tilde-expanded.
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/// - Returns: Checks, with configuration loading itself reported as a check.
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public static func runChecks(configPath: String) async -> [DoctorCheck] {
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var checks = hostChecks()
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let loaded: RunnerConfig
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do {
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loaded = try RunnerConfig.load(from: configPath).validated()
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checks.append(
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DoctorCheck(
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name: "configuration",
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result: .pass,
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detail: "loaded and validated \(RunnerConfig.expandTilde(configPath))"
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)
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)
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} catch {
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checks.append(
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DoctorCheck(
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name: "configuration",
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result: .fail,
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detail: "\(error)",
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remediation: "run `gitea-macos-runner config init` and edit \(RunnerConfig.expandTilde(configPath))"
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)
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)
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checks.append(localNetworkNote())
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return checks
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}
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checks.append(checkDiskSpace(config: loaded))
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checks.append(checkLoginKeychain())
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checks.append(contentsOf: await checkGitea(config: loaded))
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checks.append(await checkRunnerDownloadURL(config: loaded))
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checks.append(contentsOf: checkTokenFilePermissions(config: loaded))
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checks.append(localNetworkNote())
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return checks
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}
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/// The configuration-independent host checks: architecture, OS version,
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/// framework support, entitlement.
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public static func hostChecks() -> [DoctorCheck] {
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[
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checkHostCapability(),
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checkVirtualizationSupported(),
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checkVirtualizationEntitlement(),
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]
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}
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/// Whether the running binary carries `com.apple.security.virtualization`.
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///
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/// - Parameter binaryPath: Defaults to the current executable.
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/// - Returns: The check result.
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public static func checkVirtualizationEntitlement(
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binaryPath: String = CommandLine.arguments.first ?? ""
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) -> DoctorCheck {
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let name = "virtualization entitlement"
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let remediation = """
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build and install the signed bundle: `make install`, then run \
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~/Applications/GiteaMacosRunner.app/Contents/MacOS/gitea-macos-runner
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"""
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guard let executable = resolveExecutablePath(binaryPath) else {
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return DoctorCheck(
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name: name,
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result: .warn,
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detail: "could not locate the running executable to inspect",
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remediation: remediation
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)
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}
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// The entitlement lives on the signature, so a bare binary copied out of
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// the bundle loses it. Report where we are as well as what we found.
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let inAppBundle = executable.contains(".app/Contents/MacOS/")
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let signedTarget = inAppBundle
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? String(executable.prefix(upTo: executable.range(of: ".app/Contents/MacOS/")!.upperBound)
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.dropLast("/Contents/MacOS/".count))
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: executable
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let result = DoctorShell.run(
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"/usr/bin/codesign",
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["-d", "--entitlements", "-", "--xml", signedTarget]
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)
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let hasEntitlement = result.output.contains("com.apple.security.virtualization")
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if hasEntitlement {
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return DoctorCheck(
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name: name,
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result: .pass,
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detail: "present on \(signedTarget)"
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)
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}
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if inAppBundle {
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return DoctorCheck(
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name: name,
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result: .fail,
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detail: "\(signedTarget) is not signed with com.apple.security.virtualization",
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remediation: "re-sign the bundle: `make sign` (or `make install`)"
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)
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}
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// Running the plain SwiftPM binary is normal for `doctor`, `config`, and
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// `service`; it only becomes fatal when a VM is actually started.
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return DoctorCheck(
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name: name,
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result: .warn,
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detail: "running an unsigned binary at \(executable); VM starts will fail",
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remediation: remediation
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)
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}
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/// Whether `login.keychain` is currently unlocked.
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public static func checkLoginKeychain() -> DoctorCheck {
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let name = "login.keychain unlocked"
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let result = DoctorShell.run("/usr/bin/security", ["show-keychain-info", "login.keychain"])
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if result.exitCode == 0 {
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return DoctorCheck(name: name, result: .pass, detail: "unlocked")
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}
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return DoctorCheck(
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name: name,
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result: .warn,
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detail: "locked or unavailable (security exited \(result.exitCode))",
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remediation: """
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macOS 15+ refuses to start a VM while login.keychain is locked. Configure \
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automatic login, and do not lock the session — the daemon runs as a \
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LaunchAgent inside it.
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"""
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)
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}
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/// Whether the host architecture and macOS version can run macOS guests.
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public static func checkHostCapability() -> DoctorCheck {
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let name = "host capability"
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let version = ProcessInfo.processInfo.operatingSystemVersion
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let versionString = "\(version.majorVersion).\(version.minorVersion).\(version.patchVersion)"
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// Emitted straight from the preprocessor branch rather than via a `let
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// isAppleSilicon` flag: with the flag, one arm is a compile-time
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// constant and the compiler warns that the other is dead code.
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#if !arch(arm64)
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return DoctorCheck(
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name: name,
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result: .fail,
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detail: "not an Apple silicon host; macOS guests require arm64",
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remediation: "run this daemon on an Apple silicon Mac"
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)
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#else
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guard version.majorVersion >= 26 else {
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return DoctorCheck(
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name: name,
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result: .fail,
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detail: "macOS \(versionString); this daemon requires macOS 26 or newer",
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remediation: "upgrade the host: ASIF sparse disks need macOS 26+"
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)
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}
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if version.majorVersion < 27 {
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return DoctorCheck(
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name: name,
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result: .warn,
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detail: "arm64, macOS \(versionString)",
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remediation: """
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automated guest provisioning (VZMacGuestProvisioningOptions) needs macOS 27 \
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on both host and guest; on 26 the first boot's Setup Assistant must be \
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completed by hand once per image
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"""
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)
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}
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return DoctorCheck(name: name, result: .pass, detail: "arm64, macOS \(versionString)")
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#endif
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}
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/// The framework's own verdict on this host.
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public static func checkVirtualizationSupported() -> DoctorCheck {
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let name = "Virtualization.framework"
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if VZVirtualMachine.isSupported {
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return DoctorCheck(name: name, result: .pass, detail: "VZVirtualMachine.isSupported == true")
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}
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return DoctorCheck(
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name: name,
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result: .fail,
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detail: "VZVirtualMachine.isSupported == false",
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remediation: "this host cannot run virtual machines"
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)
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}
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/// Free space on the store volume against `storage.minFreeDiskGB`.
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public static func checkDiskSpace(config: RunnerConfig) -> DoctorCheck {
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let name = "free disk space"
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let store = VMStore(config: config)
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do {
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let free = try store.freeDiskSpace()
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let freeGB = Double(free) / 1_073_741_824
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let detail = String(
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format: "%.1f GB free at %@ (minimum %d GB)",
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freeGB, config.storeDirectoryURL.path, config.storage.minFreeDiskGB
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)
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if freeGB < Double(config.storage.minFreeDiskGB) {
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return DoctorCheck(
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name: name,
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result: .fail,
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detail: detail,
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remediation: "free space, or lower storage.minFreeDiskGB"
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)
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}
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return DoctorCheck(name: name, result: .pass, detail: detail)
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} catch {
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return DoctorCheck(
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name: name,
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result: .warn,
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detail: "could not measure free space: \(error)",
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remediation: "check that \(config.storeDirectoryURL.path) exists and is readable"
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)
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}
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}
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/// Reachability, admin scope, and registration-token availability.
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public static func checkGitea(config: RunnerConfig) async -> [DoctorCheck] {
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var checks: [DoctorCheck] = []
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let adminToken: String?
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do {
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adminToken = try config.resolveAdminToken()
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} catch {
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checks.append(
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DoctorCheck(
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name: "gitea admin token",
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result: .fail,
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detail: "\(error)",
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remediation: "check gitea.adminTokenFile / gitea.adminToken"
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)
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)
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return checks
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}
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guard let adminToken, !adminToken.isEmpty else {
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checks.append(
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DoctorCheck(
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name: "gitea admin api",
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result: .warn,
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detail: "no admin token configured; skipped",
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remediation: "set gitea.adminTokenFile to a file holding an ADMIN user's API token"
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)
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)
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return checks
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}
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let client = GiteaClient(baseURL: config.gitea.instanceURL, token: adminToken)
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do {
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let runners = try await client.listRunners()
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checks.append(
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DoctorCheck(
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name: "gitea admin api",
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result: .pass,
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detail: "\(config.gitea.instanceURL.absoluteString) reachable; \(runners.count) runner(s) registered"
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)
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)
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} catch {
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checks.append(
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DoctorCheck(
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name: "gitea admin api",
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result: .fail,
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detail: "\(error)",
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remediation: """
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every endpoint used lives under /api/v1/admin/actions/ — the token must \
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belong to a Gitea administrator, and the instance must be reachable
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"""
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)
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)
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}
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checks.append(await checkRegistrationToken(config: config, client: client))
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return checks
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}
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/// Whether a registration token can be obtained at all.
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private static func checkRegistrationToken(config: RunnerConfig, client: GiteaClient) async -> DoctorCheck {
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let name = "registration token"
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do {
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if let staticToken = try config.resolveStaticRegistrationToken(), !staticToken.isEmpty {
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return DoctorCheck(name: name, result: .pass, detail: "resolved from configuration")
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}
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} catch {
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return DoctorCheck(
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name: name,
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result: .fail,
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detail: "\(error)",
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remediation: "check gitea.registrationTokenFile"
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)
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}
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guard config.gitea.fetchRegistrationTokenViaAPI else {
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return DoctorCheck(
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name: name,
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result: .fail,
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detail: "no static token configured and gitea.fetchRegistrationTokenViaAPI is off",
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remediation: """
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seed a fixed token server-side (GITEA_RUNNER_REGISTRATION_TOKEN) and point \
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gitea.registrationTokenFile at a copy of it
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"""
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)
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}
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do {
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let token = try await client.getRegistrationToken()
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guard !token.isEmpty else {
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return DoctorCheck(
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name: name,
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result: .fail,
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detail: "the API returned an empty token",
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remediation: "configure gitea.registrationTokenFile instead"
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)
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}
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return DoctorCheck(name: name, result: .pass, detail: "fetched from the admin API")
|
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} catch {
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return DoctorCheck(
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name: name,
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result: .fail,
|
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detail: "\(error)",
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remediation: "configure gitea.registrationTokenFile instead"
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)
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}
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}
|
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|
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/// Whether the configured `gitea-runner` asset still exists.
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public static func checkRunnerDownloadURL(config: RunnerConfig) async -> DoctorCheck {
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let name = "runner download url"
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let url: URL
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do {
|
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url = try config.runner.resolvedDownloadURL
|
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} catch {
|
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return DoctorCheck(
|
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name: name,
|
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result: .fail,
|
|
detail: "\(error)",
|
|
remediation: "check runner.runnerDownloadURL and runner.version"
|
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)
|
|
}
|
|
|
|
// A ranged GET, not a HEAD. gitea.com answers an asset request with a
|
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// 303 to a presigned object-storage URL, and the signature covers the
|
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// *method of the request that minted it*: ask with HEAD and you get a
|
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// HEAD-signed URL. URLSession then follows the 303 and — per RFC 7231
|
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// §6.4.4 — rewrites the method to GET, so the signed URL is replayed
|
|
// with the one verb it was not signed for and the store answers 403
|
|
// SignatureDoesNotMatch. Probing with the same verb the real download
|
|
// uses is the only way to make the answer mean anything. `bytes=0-0`
|
|
// keeps it to one byte instead of the whole 20-plus MB asset.
|
|
do {
|
|
let status = try await probeStatus(url: url, method: "GET", range: "bytes=0-0")
|
|
if status <= 399 {
|
|
return DoctorCheck(name: name, result: .pass, detail: "\(url.absoluteString) → \(status)")
|
|
}
|
|
// A host that rejects ranges outright still deserves a second look
|
|
// before we call the asset missing.
|
|
let fallback = try await probeStatus(url: url, method: "HEAD", range: nil)
|
|
if fallback <= 399 {
|
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return DoctorCheck(name: name, result: .pass, detail: "\(url.absoluteString) → \(fallback)")
|
|
}
|
|
return DoctorCheck(
|
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name: name,
|
|
result: .warn,
|
|
detail: "\(url.absoluteString) → \(status)",
|
|
remediation: "check runner.version and runner.runnerDownloadURL for a darwin-arm64 asset"
|
|
)
|
|
} catch {
|
|
// Best effort: a proxy or offline build host is not a reason to
|
|
// block the daemon.
|
|
return DoctorCheck(
|
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name: name,
|
|
result: .warn,
|
|
detail: "could not reach \(url.absoluteString): \(error.localizedDescription)",
|
|
remediation: nil
|
|
)
|
|
}
|
|
}
|
|
|
|
/// Issues one probe request and reports its status code, or 0 if the
|
|
/// response was not HTTP.
|
|
private static func probeStatus(url: URL, method: String, range: String?) async throws -> Int {
|
|
var request = URLRequest(url: url)
|
|
request.httpMethod = method
|
|
request.timeoutInterval = 15
|
|
if let range {
|
|
request.setValue(range, forHTTPHeaderField: "Range")
|
|
}
|
|
let (_, response) = try await URLSession.shared.data(for: request)
|
|
return (response as? HTTPURLResponse)?.statusCode ?? 0
|
|
}
|
|
|
|
/// Warns about token files readable by other users on this Mac.
|
|
public static func checkTokenFilePermissions(config: RunnerConfig) -> [DoctorCheck] {
|
|
let insecure = config.insecureTokenFilePaths
|
|
guard !insecure.isEmpty else { return [] }
|
|
return [
|
|
DoctorCheck(
|
|
name: "token file permissions",
|
|
result: .warn,
|
|
detail: "group/world readable: \(insecure.joined(separator: ", "))",
|
|
remediation: "chmod 600 \(insecure.joined(separator: " "))"
|
|
)
|
|
]
|
|
}
|
|
|
|
/// The macOS 15+ Local Network permission note.
|
|
public static func localNetworkNote() -> DoctorCheck {
|
|
DoctorCheck(
|
|
name: "local network access",
|
|
result: .info,
|
|
detail: "guests are reached over the host-private NAT link",
|
|
remediation: """
|
|
on macOS 15+ the first connection to a guest can be blocked by the Local Network \
|
|
privacy prompt, which a background LaunchAgent cannot answer. Approve the app once \
|
|
under System Settings → Privacy & Security → Local Network.
|
|
"""
|
|
)
|
|
}
|
|
|
|
/// Renders checks as aligned, human-readable lines for the CLI.
|
|
public static func format(_ checks: [DoctorCheck]) -> String {
|
|
let width = checks.map(\.name.count).max() ?? 0
|
|
var lines: [String] = []
|
|
|
|
for check in checks {
|
|
let padded = check.name.padding(toLength: max(width, check.name.count), withPad: " ", startingAt: 0)
|
|
lines.append("\(check.result.symbol) \(padded) \(check.detail)")
|
|
if check.result != .pass, let remediation = check.remediation {
|
|
for (index, wrapped) in wrap(remediation, width: 76).enumerated() {
|
|
let prefix = index == 0 ? "→ " : " "
|
|
lines.append(String(repeating: " ", count: width + 4) + prefix + wrapped)
|
|
}
|
|
}
|
|
}
|
|
|
|
let failures = checks.filter(\.isBlocking).count
|
|
let warnings = checks.filter { $0.result == .warn }.count
|
|
lines.append("")
|
|
lines.append("\(checks.count) checks, \(failures) failed, \(warnings) warned")
|
|
return lines.joined(separator: "\n")
|
|
}
|
|
|
|
/// Greedy word wrap for remediation text.
|
|
private static func wrap(_ text: String, width: Int) -> [String] {
|
|
var lines: [String] = []
|
|
var current = ""
|
|
for word in text.split(whereSeparator: { $0 == " " || $0 == "\n" }) {
|
|
if current.isEmpty {
|
|
current = String(word)
|
|
} else if current.count + 1 + word.count <= width {
|
|
current += " " + word
|
|
} else {
|
|
lines.append(current)
|
|
current = String(word)
|
|
}
|
|
}
|
|
if !current.isEmpty { lines.append(current) }
|
|
return lines
|
|
}
|
|
|
|
/// Resolves the running executable, preferring the bundle's own record of it
|
|
/// over `argv[0]`, which may be a symlink or a bare command name.
|
|
private static func resolveExecutablePath(_ candidate: String) -> String? {
|
|
let fm = FileManager.default
|
|
if !candidate.isEmpty, candidate.hasPrefix("/"), fm.fileExists(atPath: candidate) {
|
|
return URL(fileURLWithPath: candidate).resolvingSymlinksInPath().path
|
|
}
|
|
if let executableURL = Bundle.main.executableURL {
|
|
return executableURL.resolvingSymlinksInPath().path
|
|
}
|
|
return nil
|
|
}
|
|
}
|
|
|
|
/// Minimal synchronous process runner for the tools `doctor` shells out to.
|
|
private enum DoctorShell {
|
|
struct Output {
|
|
let exitCode: Int32
|
|
let output: String
|
|
}
|
|
|
|
static func run(_ launchPath: String, _ arguments: [String]) -> Output {
|
|
let process = Process()
|
|
process.executableURL = URL(fileURLWithPath: launchPath)
|
|
process.arguments = arguments
|
|
|
|
let pipe = Pipe()
|
|
process.standardOutput = pipe
|
|
// codesign and security both report on stderr; merge so callers can grep
|
|
// one stream.
|
|
process.standardError = pipe
|
|
|
|
do {
|
|
try process.run()
|
|
} catch {
|
|
return Output(exitCode: 127, output: "\(error)")
|
|
}
|
|
|
|
let data = pipe.fileHandleForReading.readDataToEndOfFile()
|
|
process.waitUntilExit()
|
|
return Output(exitCode: process.terminationStatus, output: String(data: data, encoding: .utf8) ?? "")
|
|
}
|
|
}
|