swift – 如何从我的mac应用程序中访问Terminal的$PATH变量,似乎使用了不同的$PATH

我正在尝试创建一个mac应用程序,用户可以输入命令,就像在mac终端中一样,我得到了大部分工作,但我发现从发现者或 xcode运行的应用程序的$PATH变量是不同的比终端使用的$PATH变量.

我可以运行命令并找到一种方法来为应用程序的$PATH变量添加预定义路径,但是我需要一种方法来自动读取Terminal的$PATH变量并将其复制到Application的$PATH变量.这应该是自动化的,因为用户将在其变量中具有不同的路径.

我还发现,当我使用“open appname.app”从终端运行应用程序时,使用了正确的$PATH变量(终端使用的是同一个变量)

到目前为止这是我的代码：

let task = Process()
    var env = ProcessInfo.processInfo.environment
    var path = env["PATH"]! as String
    path = "/usr/local/bin:" + path
    env["PATH"] = path
    task.environment = env
    task.launchPath = "/usr/bin/env"
    task.arguments = ["echo","$PATH"]
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    task.waitUntilExit()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output: String = NSString(data: data, encoding: String.Encoding.utf8.rawValue) as! String
    print(output)

这会将“/usr/local/bin”添加到Application的$PATH中,但我需要一种方法来复制终端的$PATH中的值.

谢谢！

添加bash Shell Path

可以在/ etc / paths和/etc/path.d/中找到默认的shell路径.读取shell路径的一种方法是使用path_helper命令.扩展上面的代码示例并使用bash作为shell：

let taskShell = Process()
var envShell = ProcessInfo.processInfo.environment
taskShell.launchPath = "/usr/bin/env"
taskShell.arguments = ["/bin/bash","-c","eval $(/usr/libexec/path_helper -s) ; echo $PATH"]
let pipeShell = Pipe()
taskShell.standardOutput = pipeShell
taskShell.standardError = pipeShell
taskShell.launch()
taskShell.waitUntilExit()
let dataShell = pipeShell.fileHandleForReading.readDataToEndOfFile()
var outputShell: String = NSString(data: dataShell, encoding: String.Encoding.utf8.rawValue) as! String
outputShell = outputShell.replacingOccurrences(of: "\n", with: "", options: .literal, range: nil)
print(outputShell)

let task = Process()
var env = ProcessInfo.processInfo.environment
var path = env["PATH"]! as String
path = outputShell + ":" + path
env["PATH"] = path
task.environment = env
task.launchPath = "/usr/bin/env"
task.arguments = ["/bin/bash", "-c", "echo $PATH"]
let pipe = Pipe()
task.standardOutput = pipe
task.standardError = pipe
task.launch()
task.waitUntilExit()
let data = pipe.fileHandleForReading.readDataToEndOfFile()
var output: String = NSString(data: data, encoding: String.Encoding.utf8.rawValue) as! String
output = output.replacingOccurrences(of: "\n", with: "", options: .literal, range: nil)
print(output)

注意：

>此代码示例以非交互模式调用shell.这意味着它不会执行任何用户特定的配置文件;例如/Users/*userid*/.bash_profile.
>路径可以在PATH环境变量中多次列出.它们将从左到右遍历.

参考

应用程序上有几个线程,OS X的shell PATH提供了更多上下文
How to set system wide environment variables on OS X Mavericks
和
Setting the system wide path environment variable in mavericks