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 Dictionary of Options, and a new CommandLineKit 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     flags["version"] = BoolOption(shortFlag: "v", longFlag: "version", helpMessage: "Prints the version.")
  14
  15     parser.addOptions(Array(flags.values))
  16
  17     return (flags, parser)
  18 }
  19
  20 func main() {
  21
  22     let (flags, parser) = createParser()
  23
  24     do {
  25         try parser.parse()
  26     }
  27     catch {
  28         parser.printUsage(error)
  29         exit(EX_USAGE)
  30     }
  31
  32     if let helpFlag = flags["help"] as? BoolOption {
  33         if helpFlag.value == true {
  34                 parser.printUsage()
  35                 exit(0)
  36             }
  37     }
  38
  39     if let versionFlag = flags["version"] as? BoolOption {
  40         if versionFlag.value == true {
  41                 print(Lyricli.version)
  42                 exit(0)
  43             }
  44     }
  45
  46 }
  47
  48 main()