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Driver: simplify `Driver.computeSDKPath(_:compilerMode:toolchain:targ… #1771

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Driver: simplify `Driver.computeSDKPath(_:compilerMode:toolchain:targ… #1771

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56 changes: 17 additions & 39 deletions Sources/SwiftDriver/Driver/Driver.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -2854,53 +2854,31 @@ extension Driver {
diagnosticsEngine: DiagnosticsEngine,
env: [String: String]
) -> VirtualPath? {
var sdkPath: String?

if let arg = parsedOptions.getLastArgument(.sdk) {
sdkPath = arg.asSingle
} else if let SDKROOT = env["SDKROOT"] {
sdkPath = SDKROOT
} else if compilerMode == .immediate || compilerMode == .repl {
// In immediate modes, query the toolchain for a default SDK.
sdkPath = try? toolchain.defaultSDKPath(targetTriple)?.pathString
guard let sdkPath = parsedOptions.getLastArgument(.sdk)?.asSingle ??
env["SDKROOT"] ??
// In immediate modes, query the toolchain for a default SDK.
([.immediate, .repl].contains(compilerMode) ? try? toolchain.defaultSDKPath(targetTriple)?.pathString : nil),
!sdkPath.isEmpty else {
return nil
}

// An empty string explicitly clears the SDK.
if sdkPath == "" {
sdkPath = nil
}
// Validate the SDK if we found one.
let path: VirtualPath = .absolute(.init(URL(fileURLWithPath: sdkPath).absoluteURL.path))

// Delete trailing /.
sdkPath = sdkPath.map { $0.count > 1 && $0.last == "/" ? String($0.dropLast()) : $0 }
guard FileManager.default.fileExists(atPath: path.description) else {
diagnosticsEngine.emit(.warning_no_such_sdk(path.description))
return path
}

// Validate the SDK if we found one.
if let sdkPath = sdkPath {
let path: VirtualPath

// FIXME: TSC should provide a better utility for this.
if let absPath = try? AbsolutePath(validating: sdkPath) {
path = .absolute(absPath)
} else if let relPath = try? RelativePath(validating: sdkPath) {
path = .relative(relPath)
} else {
diagnosticsEngine.emit(.warning_no_such_sdk(sdkPath))
if targetTriple?.isDarwin ?? (defaultToolchainType == DarwinToolchain.self) {
if isSDKTooOld(sdkPath: path, fileSystem: fileSystem,
diagnosticsEngine: diagnosticsEngine) {
diagnosticsEngine.emit(.error_sdk_too_old(path.description))
return nil
}

if (try? fileSystem.exists(path)) != true {
diagnosticsEngine.emit(.warning_no_such_sdk(sdkPath))
} else if (targetTriple?.isDarwin ?? (defaultToolchainType == DarwinToolchain.self)) {
if isSDKTooOld(sdkPath: path, fileSystem: fileSystem,
diagnosticsEngine: diagnosticsEngine) {
diagnosticsEngine.emit(.error_sdk_too_old(sdkPath))
return nil
}
}

return path
}

return nil
return path
}
}

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2 changes: 1 addition & 1 deletion Tests/SwiftDriverTests/SwiftDriverTests.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -7271,7 +7271,7 @@ final class SwiftDriverTests: XCTestCase {
XCTAssertEqual(compileJob.kind, .compile)
try XCTAssertJobInvocationMatches(compileJob, .flag("-primary-file"), toPathOption("foo.swift", isRelative: true))
try XCTAssertJobInvocationMatches(compileJob, .flag("-resource-dir"), toPathOption("relresourcepath", isRelative: true))
try XCTAssertJobInvocationMatches(compileJob, .flag("-sdk"), toPathOption("relsdkpath", isRelative: true))
try XCTAssertJobInvocationMatches(compileJob, .flag("-sdk"), .path(.absolute(.init(URL(fileURLWithPath: FileManager.default.currentDirectoryPath).appendingPathComponent("relsdkpath").path))))
}

do {
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