Run 🏃

Run provides a quick, concise way to run an external command and read its standard output and standard error.

Usage

To execute a simple command you would do:

let result = run("ls -all")
print(result.stdout)

result type is RunResults, it contains:

• exitStatus: The command exit status
• stdout: The standard output for the command executed
• stderr: The standard error for the command executed

While run("command") can split the arguments by spaces. Some times argument splitting is not trivial. If you have multiple argument to pass to the command to execute, you should use run(command: String, args: String...). The above translates to:

let result = run("ls", args: "-all")

To customize the run function, you can pass in a customization block:

let result = run("ls -all") { settings in
    settings.dryRun = true
    settings.echo = [.Stdout, .Stderr, .Command]
    settings.interactive = false
}

settings is an instance of RunSettings, which contains the following variables:

• settings.dryRun: defaults to false. If false, the command is actually run. If true, the command is logged to the stdout paramter of result
• settings.echo: Customize the message printed to stdout, echo can contain any of the following:
  • EchoSettings.Stdout: The stdout returned from running the command will be printed to the terminal
  • EchoSettings.Stderr: The stderr returned from running the command will be printed to the terminal
  • EchoSettings.Command: The command executed will be printed to the terminal
• settings.interactive: defaults to false. If set to true the command will be executed using system kernel function and only the exit status will be captured. If set to false, the command will be executed using NSTask and both stdout and stderr will be captured. Set interactive to true if you expect the launched command to ask input from the user through the stdin.

runWithoutCapture("command") is a quick way to run a command in interactive mode. The return value is the exit code of that command.

Installation

Swift Package Manager

.package(url: "https://github.com/getGuaka/Run.git", from: "0.1.0"),

License

MIT