git.r.bdr.sh - rbdr/lyricli/blob - Sources/main.swift

   1 import CommandLineKit
   2 import Foundation
   3
   4 /// Sets up and returns a new options parser
   5 ///
   6 /// - Returns: A new OptionParser instance
   7 func createParser() -> ([String:Option], CommandLineKit) {
   8
   9     let parser = CommandLineKit()
  10     var flags: [String:Option] = [:]
  11
  12     flags["help"] = BoolOption(shortFlag: "h", longFlag: "help", helpMessage: "Prints a help message.")
  13
  14     parser.addOptions(Array(flags.values))
  15
  16     return (flags, parser)
  17 }
  18
  19 func main() {
  20
  21     let (flags, parser) = createParser()
  22
  23     do {
  24         try parser.parse()
  25     }
  26     catch {
  27         parser.printUsage(error)
  28         exit(EX_USAGE)
  29     }
  30
  31     if let helpFlag = flags["help"] as? BoolOption {
  32         if helpFlag.value == true {
  33                 parser.printUsage()
  34                 exit(0)
  35             }
  36     }
  37
  38 }
  39
  40 main()