Calling xcodebuild from Swift command line tool fails

问题

I'm writing simple swift command line tool application that automates some of my iOS Dev work. Everything is working except one thing - calling xcodebuild script.

My method looks like this:

func runTest(deviceName: String, os: String) {
        killAllSimulators()
        let sdk = "iphonesimulator"
        let destination = "platform=iOS Simulator,name=" + deviceName + ",OS=" + os
        let arguments = ["-workspace", workspace, "-scheme", scheme, "-sdk", sdk, "-destination", destination, "test"]
        executor.executeCommand("xcodebuild", arguments: arguments)
    }

deviceName is equal to "iPhone 4s", os is equal to "9.0", workspace and scheme variables are properly set.

My execute command has simple implementation:

func executeCommand(command: String, arguments: [String]) -> NSString?  {
        _ = NSProcessInfo.processInfo().processIdentifier
        let pipe = NSPipe()
        let fileHandle = pipe.fileHandleForReading

        let task = NSTask()
        task.launchPath = "/usr/bin/" + command
        task.arguments = arguments
        task.standardOutput = pipe

        task.launch()
        let data = fileHandle.readDataToEndOfFile()
        fileHandle.closeFile()

        return NSString(data: data, encoding: NSUTF8StringEncoding)
    }

i got error that test failed because cdtool cannot compile. Thats very weird because exactly the same script called from terminal works..

Any ideas?

来源：https://stackoverflow.com/questions/31454008/calling-xcodebuild-from-swift-command-line-tool-fails