Reads a plist with top-level dictionary and converts to JSON

plist-to-json.swift

import Foundation

// Reads a plist with top-level dictionary and converts to JSON. JSON printed to stdout.
// Run like this: `swift plist-to-json.swift myplist.plist`

guard CommandLine.arguments.count == 2 else {
  let msg = "Usage: \(CommandLine.arguments[0]) <path-to-input.plist>\n"
  try FileHandle.standardError.write(contentsOf: Data(msg.utf8))
  exit(1)
}

let dict = try NSDictionary(contentsOf: URL(fileURLWithPath: CommandLine.arguments[1]), error: ())
let data = try JSONSerialization.data(withJSONObject: dict, options: [.prettyPrinted, .withoutEscapingSlashes, .sortedKeys])
try FileHandle.standardOutput.write(contentsOf: data)