blob: 03267cb35002574f5248c36d610e358099ed5f3d [file] [log] [blame]
// Copyright 2016 The Tulsi Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import Foundation
/// Splits a string containing commandline arguments into an array of strings suitable for use by
/// Process.
class CommandLineSplitter {
let scriptPath: String
init() {
scriptPath = Bundle(for: type(of: self)).path(forResource: "command_line_splitter",
ofType: "sh")!
}
/// WARNING: This method utilizes a shell instance to evaluate the commandline and may have side
/// effects.
func splitCommandLine(_ commandLine: String) -> [String]? {
if commandLine.isEmpty { return [] }
var splitCommands: [String]? = nil
let semaphore = DispatchSemaphore(value: 0)
let process = ProcessRunner.createProcess(scriptPath, arguments: [commandLine]) {
completionInfo in
defer { semaphore.signal() }
guard completionInfo.terminationStatus == 0,
let stdout = NSString(data: completionInfo.stdout, encoding: String.Encoding.utf8.rawValue) else {
return
}
let split = stdout.components(separatedBy: CharacterSet.newlines)
splitCommands = [String](split.dropLast())
}
process.launch()
_ = semaphore.wait(timeout: DispatchTime.distantFuture)
return splitCommands
}
}