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//===--------------- ProessProtocol.swift - Swift Subprocesses ------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import class TSCBasic.Process
import struct TSCBasic.ProcessResult
import class Foundation.FileHandle
import struct Foundation.Data
/// Abstraction for functionality that allows working with subprocesses.
public protocol ProcessProtocol {
/// The PID of the process.
///
/// Clients that don't really launch a process can return
/// a negative number to represent a "quasi-pid".
///
/// - SeeAlso: https://github.com/apple/swift/blob/main/docs/DriverParseableOutput.rst#quasi-pids
var processID: TSCBasic.Process.ProcessID { get }
/// Wait for the process to finish execution.
@discardableResult
func waitUntilExit() throws -> ProcessResult
static func launchProcess(
arguments: [String],
env: [String: String]
) throws -> Self
static func launchProcessAndWriteInput(
arguments: [String],
env: [String: String],
inputFileHandle: FileHandle
) throws -> Self
}
extension TSCBasic.Process: ProcessProtocol {
public static func launchProcess(
arguments: [String],
env: [String: String]
) throws -> TSCBasic.Process {
let process = Process(arguments: arguments, environment: env)
try process.launch()
return process
}
public static func launchProcessAndWriteInput(
arguments: [String],
env: [String: String],
inputFileHandle: FileHandle
) throws -> TSCBasic.Process {
let process = Process(arguments: arguments, environment: env)
let processInputStream = try process.launch()
var input: Data
// Write out the contents of the input handle and close the input stream
repeat {
input = inputFileHandle.availableData
processInputStream.write(input)
} while (input.count > 0)
processInputStream.flush()
try processInputStream.close()
return process
}
}
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