Swift server-side proc run.txt

import PerfectLib
import Foundation
import Cocoa

#if os(Linux)
	import SwiftGlibc
#else
	import Darwin
#endif

/*
			try runProc("/usr/local/bin/binary_here", args: args, envs: ["API_KEY":config.accessKey, "API_ACCESS_KEY":config.secret]) {
				str in
				// use str
			}

*/

public func runProc(_ cmd: String, args: [String], read: ((String) -> ())? = nil) throws {
	try runProc(cmd, args: args, envs: [String : String](), read: read)
}

public func runProc(_ cmd: String, args: [String], envs: [String:String], read: ((String) -> ())? = nil) throws {
	var ienvs = [("PATH", "/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local:/usr/local/Cellar:~/.swiftenv/"),
	            ("HOME", ProcessInfo.processInfo.environment["HOME"]!),
	            ("LANG", "en_CA.UTF-8")]
	for e in envs {
		ienvs.append(e)
	}
	var newCmd = "\"\(cmd)\""
	for n in 0..<args.count {
		newCmd.append(" $\(n)")
	}
	let proc = try SysProcess("/bin/bash", args: ["--login", "-c", newCmd] + args, env: ienvs)
	if let read = read {
		while true {
			do {
				guard let s = try proc.stdout?.readSomeBytes(count: 1024) , s.count > 0 else {
					break
				}
				let str = UTF8Encoding.encode(bytes: s)
				read(str)
			} catch PerfectLib.PerfectError.fileError(let code, _) {
				if code != EINTR {
					break
				}
			}
		}
	}
	let res = try proc.wait(hang: true)
	if res != 0 {
		let s = try proc.stderr?.readString()
		throw PerfectError.systemError(Int32(res), s!)
	}
}