Thank you. Yes, giving the full path to the executable name indeed solve the
problem. I found it a few moments after I send this question. Sorry if the
question sounds a bit silly. :)
Another problem from the same code above is it fails to supply data to stdin.
It seems the input data doesn't get delivered to the pipe. So, it just stucks
waiting forever. I had to kill the process manually. Which also raises another
question, how to make Task doesn't wait forever? So, it has some kind of time
out mechanism.
Thank you.
Regards,
–Mr Bee
Pada Senin, 9 Januari 2017 17:09, Alex Blewitt <[email protected]> menulis:
When you run it with absolute paths for the 'swift' and 'python' executables,
does it work then?
Alex
On 9 Jan 2017, at 06:20, Mr Bee via swift-users <[email protected]> wrote:
Hi,
I'm writing a simple editor on Linux for Swift language. I use Task (was
NSTask) to run the Swift REPL. Unfortunately, Task failed to execute the Swift
REPL for no obvious reasons. The Swift compiler and REPL are installed just
fine and able to execute any Swift codes. However, my exact same code has no
problem to run bash commands.
Here's the code:_____
import Foundation
extension Task { func execute(command: String, currentDir: String = "~",
arguments: [String] = [], input: String = "") -> String { if !input.isEmpty
{ let pipeIn = Pipe() self.standardInput = pipeIn // multiple
inputs are separated by newline if let input = input.data(using:
String.Encoding.utf8) { pipeIn.fileHandleForWriting.write(input) }
} let pipeOut = Pipe() self.standardOutput = pipeOut
self.arguments = arguments self.launchPath = command
self.currentDirectoryPath = currentDir self.launch() let output =
pipeOut.fileHandleForReading.readDataToEndOfFile() self.waitUntilExit()
return String(data: output, encoding: String.Encoding(rawValue:
String.Encoding.utf8.rawValue))! }}
print(Task().execute(command: "swift", arguments: ["test.swift"])) // <-
FAILED// print(Task().execute(command: "python", arguments: ["test.py"])) // <-
FAILED// print(Task().execute(command: "/bin/ls", arguments: ["-l"])) // <-
OK
_____
The test code is just a simple hello world program, nothing fancy. Can anybody
here enlighten me what did I wrong with the code? I'm using Swift v.3.0 on
Ubuntu Linux 14.04.
Thank you.
Regards,
–Mr Bee
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