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//
// Work.swift
// Work
//
// Copyright (c) 2018 Jason Nam (https://jasonnam.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
import Foundation
/// Shell command.
open class Work: Operation {
/// Termination result.
open private(set) var result: WorkResult?
// Standard output.
open var standardOutput: String {
return standardOutputRawString.trimmingNewLineCharacter()
}
// Standard error.
open var standardError: String {
return standardErrorRawString.trimmingNewLineCharacter()
}
/// Standard output raw string.
private var standardOutputRawString: String
/// Standard error raw string.
private var standardErrorRawString: String
/// Standard output pipe.
public let standardOutputPipe: Pipe
/// Standard error pipe.
public let standardErrorPipe: Pipe
/// Process object.
public let task: Process
/// Standard output handler.
open var standardOutputHandler: ((String) -> Void)?
/// Standard error handler.
open var standardErrorHandler: ((String) -> Void)?
/// Block invoked on process termination.
open var completion: ((WorkResult) -> Void)?
/// Initialize work.
///
/// - Parameters:
/// - command: Shell command to execute.
/// - standardOutputHandler: Standard output handler.
/// - standardErrorHandler: Standard error handler.
/// - completion: Block invoked on process termination.
public init(command: String,
standardOutputHandler: ((String) -> Void)? = nil,
standardErrorHandler: ((String) -> Void)? = nil,
completion: ((WorkResult) -> Void)? = nil) {
task = Process()
self.standardOutputHandler = standardOutputHandler
self.standardErrorHandler = standardErrorHandler
self.completion = completion
standardOutputPipe = Pipe()
standardErrorPipe = Pipe()
standardOutputRawString = ""
standardErrorRawString = ""
super.init()
task.launchPath = "/bin/bash"
task.arguments = ["-c", command]
task.standardOutput = standardOutputPipe
task.standardError = standardErrorPipe
standardOutputPipe.fileHandleForReading.readabilityHandler = { [weak self] fileHandle in
guard let string = String(data: fileHandle.availableData, encoding: .utf8) else { return }
guard !string.isEmpty else { return }
self?.standardOutputRawString += string
self?.standardOutputHandler?(string.trimmingNewLineCharacter())
}
standardErrorPipe.fileHandleForReading.readabilityHandler = { [weak self] fileHandle in
guard let string = String(data: fileHandle.availableData, encoding: .utf8) else { return }
guard !string.isEmpty else { return }
self?.standardErrorRawString += string
self?.standardErrorHandler?(string.trimmingNewLineCharacter())
}
}
/// Execute shell command.
open override func main() {
task.launch()
task.waitUntilExit()
if task.terminationStatus == EXIT_SUCCESS {
result = .success(self)
} else {
result = .failure(self, task.terminationStatus)
}
completion?(result!)
}
}